diff --git a/college/2 constructor.cpp b/college/2 constructor.cpp
new file mode 100644
index 0000000..cf896ef
--- /dev/null
+++ b/college/2 constructor.cpp	
@@ -0,0 +1,35 @@
+/* WAP to print area of the three rooms usin differenttypes of constrctors
+default -- parameterized constructor*/
+
+#include<iostream>
+using namespace std;
+
+class Area
+{
+    int length, breadth;
+public:
+    Area()
+    {
+        cout<<"Enter length and breadth of room 1"<<endl;
+        cin>>length>>breadth;
+        cout<<"Area of room 1 is "<<length*breadth<<endl;
+    }
+
+    Area(int l, int b)
+    {
+        cout<<"Area of room 2: "<<l*b<<endl;
+    }
+
+    Area(double l, double b)
+    {
+        cout<<"Area of room 3: "<<l*b;
+    }
+
+};
+
+int main(void)
+{
+    Area a;
+    Area ar(12,12);
+    Area are(1.2,2.5);
+}
\ No newline at end of file
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index 0000000..4efccc9
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diff --git a/college/Exception Handling/c1e2 b/college/Exception Handling/c1e2
new file mode 100644
index 0000000..f822e10
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diff --git a/college/Exception Handling/c2 b/college/Exception Handling/c2
new file mode 100644
index 0000000..dbc5988
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diff --git a/college/Exception Handling/c2e3.cpp b/college/Exception Handling/c2e3.cpp
new file mode 100644
index 0000000..ee37215
--- /dev/null
+++ b/college/Exception Handling/c2e3.cpp	
@@ -0,0 +1,17 @@
+/*WAP a program to input the age of the user. If it is above 18 print,
+ * "You are eligible to apply! do the following:
+ * a. Less than 0, "Invalid Age"
+ * b. Less than 18, "Want some years!"
+ * c. Greater than 30, "Not eligible"
+ * d. Greater than 200, "No such age!"
+ */
+
+#include<iostream>
+using namespace std;
+
+int main()
+{
+
+
+    return 0;
+}
diff --git a/college/Exception Handling/case1.cpp b/college/Exception Handling/case1.cpp
new file mode 100644
index 0000000..82e6a96
--- /dev/null
+++ b/college/Exception Handling/case1.cpp	
@@ -0,0 +1,29 @@
+/*
+ * case 1 -- One catch and one throw
+ *        -- three keywords -> try throw catch
+*/
+
+
+#include<iostream>
+using namespace std;
+
+int main()
+{
+    int a = 2, b = 0;
+    int c;
+
+    try
+    {
+        if(b==0)
+            throw 1;
+        else
+            c=a/b;
+            cout<<c<<endl;
+    }
+    catch(int x)
+    {
+        cout<<"Divided by 0 case";
+    }
+
+    return 0;
+}
diff --git a/college/Exception Handling/case2.cpp b/college/Exception Handling/case2.cpp
new file mode 100644
index 0000000..2956273
--- /dev/null
+++ b/college/Exception Handling/case2.cpp	
@@ -0,0 +1,42 @@
+/* multiple throws and multiple catches
+ *
+ * /*
+ * WAP to input only +ve numbers.
+ * If user inputs -ve number show   --  "Negative Numbers Not Allowed" as exception
+ * If user inputs 0 number show   --  "Zero Not Allowed" as exception
+ */
+
+
+
+#include<iostream>
+using namespace std;
+
+int main()
+{
+    int PN;
+    cout<<"Input any positive number"<<endl;
+    cin>>PN;
+    try
+    {
+        if(PN<0)
+            throw 1;
+        else
+            cout<<"You've entered: "<<PN;
+    }
+    catch(int x)
+    {
+        cout<<endl<<"Negative Numbers Not Allowed"<<endl<<endl;
+    }
+
+    try
+    {
+        if(PN==0)
+            throw 1.1f;
+    }
+    catch(float y)
+    {
+        cout<<endl<<"Zero Not Allowed"<<endl<<endl;
+    }
+
+    return 0;
+}
diff --git a/college/Exception Handling/caseg2.cpp b/college/Exception Handling/caseg2.cpp
new file mode 100644
index 0000000..5865de3
--- /dev/null
+++ b/college/Exception Handling/caseg2.cpp	
@@ -0,0 +1,28 @@
+/*
+ * WAP to input only +ve numbers. If user inputs -ve number show
+ * "Negative Numbers Not Allowed" as exception
+ */
+
+
+
+#include<iostream>
+using namespace std;
+
+int main()
+{
+    int PN;
+    cout<<"Input any positive number"<<endl;
+    cin>>PN;
+    try
+    {
+        if(PN<0)
+            throw 0;
+        else
+            cout<<"You've entered: "<<PN;
+    }
+    catch(int x)
+    {
+        cout<<endl<<"Negative Numbers Not Allowed"<<endl<<endl;
+    }
+    return 0;
+}
diff --git a/college/Exception Handling/eg.cpp b/college/Exception Handling/eg.cpp
new file mode 100644
index 0000000..ca1bfc4
--- /dev/null
+++ b/college/Exception Handling/eg.cpp	
@@ -0,0 +1,23 @@
+#include<iostream>
+using namespace std;
+
+int main()
+{
+    int a = 2, b = 0;
+    int c;
+
+    try
+    {
+        if(b==0)
+            throw 1;
+        else
+            c=a/b;
+            cout<<c<<endl;
+    }
+    catch(int x)
+    {
+        cout<<"Divided by 0 case";
+    }
+
+    return 0;
+}
diff --git a/college/Exception Handling/eg1 b/college/Exception Handling/eg1
new file mode 100644
index 0000000..0b18b2a
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diff --git a/college/Lab 8 - Polymorphism/function overloading.cpp b/college/Lab 8 - Polymorphism/function overloading.cpp
new file mode 100644
index 0000000..38d839c
--- /dev/null
+++ b/college/Lab 8 - Polymorphism/function overloading.cpp	
@@ -0,0 +1,25 @@
+#include<iostream>
+using namespace std;
+
+class fxnover
+{
+public:
+    void sum(int a,int b)
+    {
+        int sum = a+b;
+        cout<<"Sum: "<<sum<<endl;
+    }
+    void sum(double a, double b)
+    {
+        double sum = a+b;
+        cout<<"Sum: "<<sum<<endl;
+    }
+};
+
+int main()
+{
+    fxnover fo;
+    fo.sum(1,2);
+    fo.sum(1.2,2.1);
+    return 0;
+}
diff --git a/college/Lab 8 - Polymorphism/fxo b/college/Lab 8 - Polymorphism/fxo
new file mode 100644
index 0000000..aac1051
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diff --git a/college/Lab 8 - Polymorphism/operator overloading.cpp b/college/Lab 8 - Polymorphism/operator overloading.cpp
new file mode 100644
index 0000000..6341bc8
--- /dev/null
+++ b/college/Lab 8 - Polymorphism/operator overloading.cpp	
@@ -0,0 +1,56 @@
+/*
+ * Note: can't overload these operators   ::  .  .*  ?:
+ * operator overloading is fuction of Polymorphism i.e OOP -- hence operator overloading isn't available in C
+*/
+
+
+#include<iostream>
+using namespace std;
+
+class Complex
+{
+    int real,imag;
+
+public:
+    Complex()
+    {
+        real = 0;
+        imag = 0;
+    }
+
+    Complex(int r, int i)
+    {
+        this->real = r;      //this
+        this->imag = i;
+    }
+    void show()
+    {
+        cout<<real<<"+"<<imag<<"i"<<endl;
+    }
+
+    Complex operator +(Complex o) //copy constructor , operator is a keyword
+    {
+        Complex c;
+        c.real = this->real + o.real;
+        c.imag = this->imag + o.imag;
+        return c;
+    }
+};
+
+int main()
+{
+    Complex c1(2,3);
+    cout<<endl<<"First Input"<<endl;
+    c1.show();
+
+    Complex c2(4,3);
+    cout<<endl<<"Second Input"<<endl;
+    c2.show();
+
+    cout<<endl<<"Sum"<<endl;
+    Complex c3;
+    c3 = c1 + c2;
+    c3.show();
+
+    return 0;
+}
diff --git a/college/Lab 8 - Polymorphism/opv b/college/Lab 8 - Polymorphism/opv
new file mode 100644
index 0000000..fefdc76
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diff --git a/college/Lab 8 - Polymorphism/virtual b/college/Lab 8 - Polymorphism/virtual
new file mode 100644
index 0000000..8da0cd4
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diff --git a/college/all construtor.cpp b/college/all construtor.cpp
new file mode 100644
index 0000000..ba75585
--- /dev/null
+++ b/college/all construtor.cpp	
@@ -0,0 +1,38 @@
+/*WAP to print sum and difference of two float numbers using all three types of constructors*/
+
+#include<iostream>
+using namespace std;
+
+class calc
+{
+        float a,b;
+public:
+    calc()
+    {
+        float x=28.34, y=22.21;
+        cout<<"Sum: "<<x+y<<endl<<"Difference: "<<x-y<<endl<<endl;
+    }
+    calc(float x, float y)
+    {
+        a=x;b=y;
+        cout<<"Sum: "<<a+b<<endl<<"Difference: "<<a-b<<endl<<endl;
+    }
+    calc(calc &ulate)
+    {
+        a=ulate.a;
+        b=ulate.b;
+        cout<<"Sum: "<<a+b<<endl<<"Difference: "<<a-b;
+    }   
+};
+
+int main()
+{
+    calc ua;
+    calc mn(12.2,1.22);
+    calc op(ua);
+    calc opq(mn);
+
+    return 0;
+}
+
+
diff --git a/college/all construtor.exe b/college/all construtor.exe
new file mode 100644
index 0000000..ab3e289
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diff --git a/college/c.cpp b/college/c.cpp
new file mode 100644
index 0000000..4d94c85
--- /dev/null
+++ b/college/c.cpp
@@ -0,0 +1,67 @@
+#include <iostream>
+#include <string>
+#include <windows.h>
+// #include<windows.h>
+// Sleep(milliseconds);
+using namespace std;
+
+class k
+{
+    int num, n = 1;
+    string name[100];
+    static int counter;
+
+public:
+    // IT IS THE INPUT SECTION
+    void input()
+    {
+        // cout << "Press 1 to exit from the program" << endl;
+        cout << "Enter the name of the item " << endl;
+        for (int i = 0; i < n; i++)
+        {
+            Sleep(100);
+            cin >> name[i];
+            n++;
+            counter++;
+            cin >> num;
+            if (num == 0)
+            {
+                break;
+            }
+            else
+                continue;
+        }
+    }
+
+    // IT IS THE OUTPUT SECTION
+    void output()
+    {
+        cout << endl
+             << "The name of the stored items is" << endl;
+        for (int i = 0; i < counter; i++)
+        {
+            cout << name[i] << endl;
+        }
+    }
+    static void dc()
+    {
+        cout << "Total no of stored items is : " << counter << endl;
+    }
+};
+int k::counter;
+int main()
+{
+    k c;
+    c.input();
+    c.output();
+    k::dc();
+    return 0;
+}
+
+/*
+
+Yaha maile main kura chai user le input function ma ta jatti pani items haru halna milyo ni ta 
+Ani yesi user lai for eg:5 item halesi input function bata bahira niklina mann xa re haina tara 
+user le harek patak ko string input sang sangai num vanne varaible ko value ni magxa , so yesto huda user 
+le harek patak ma number ko value haliraknu parxa, which is not simple and easy for each repeattion of loop
+*/
\ No newline at end of file
diff --git a/college/c.exe b/college/c.exe
new file mode 100644
index 0000000..6cc6748
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diff --git a/college/complex using complex.cpp b/college/complex using complex.cpp
new file mode 100644
index 0000000..da93c5f
--- /dev/null
+++ b/college/complex using complex.cpp	
@@ -0,0 +1,37 @@
+class complex
+{
+    int real,imag;
+public:
+    void set()
+    {
+        cout<<"enter real and imag part: ";
+        cin>>real>>imag;
+    }
+
+    friend complex sum(complex,complex);
+    void display();
+};
+
+void complex::display()
+{
+cout<<"the sum of complex num is"<<real<<"+i"<<imag;
+}
+
+complex sum(complex a,complex b)
+{
+    complex t;
+    t.real=a.real+b.real;
+    t.imag=a.imag+b.imag;
+    return t;
+}
+
+int main()
+{
+    complex a,b,c;
+    a.set();
+    b.set();
+    c=sum(a,b);
+    c.display();
+
+    return(0);
+}
\ No newline at end of file
diff --git a/college/constructor copy.cpp b/college/constructor copy.cpp
new file mode 100644
index 0000000..5e781fb
--- /dev/null
+++ b/college/constructor copy.cpp	
@@ -0,0 +1,42 @@
+#include<iostream>
+using namespace std;
+
+class Example
+{
+    int n1,n2;
+public:
+    Example()
+    {
+        n1=100;
+        n2=50;
+    }
+    Example(int num1, int num2)
+    {
+        n1=num1;
+        n2=num2;
+    }
+    Example(Example &obj)
+    {
+        n1=obj.n1;
+        n2=obj.n2;
+    }
+
+    void display()
+    {
+        cout<<"n1 ="<<n1<<"\t n2="<<n2<<endl;
+    }
+};
+
+int main()
+{
+    Example e1(10,5);       //parameterized constructor
+    e1.display();           //10 5 will be displayed
+    Example e2(e1);         //copy constructor -- e2 copies e1
+    e2.display();           //10 5
+    Example e3;             //default constructor
+    e3.display();           //100 50
+    Example e4(e3);         //e4 copies e3 -- 100 50 from default
+    e4.display();
+
+    return 0;
+}
\ No newline at end of file
diff --git a/college/constructor copy.exe b/college/constructor copy.exe
new file mode 100644
index 0000000..d16fe4f
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diff --git a/college/constructor copy2.cpp b/college/constructor copy2.cpp
new file mode 100644
index 0000000..ed4b881
--- /dev/null
+++ b/college/constructor copy2.cpp	
@@ -0,0 +1,47 @@
+/*
+WAP to print sum and product of two numbers using sum() and product() functions
+using concept of all constructors
+*/
+
+#include<iostream>
+using namespace std;
+
+class calc
+{
+    int n1,n2,sum,product;
+public:
+    calc()
+    {
+        n1=100;
+        n2=50;
+        sum = n1+n2;
+        product = n1*n2;
+        cout<<"Sum is "<<sum<<" and product is "<<product<<"."<<endl;
+    }
+    calc(int num1, int num2)
+    {
+        n1=num1;
+        n2=num2;
+        sum = n1+n2;
+        product = n1*n2;
+        cout<<"Sum is "<<sum<<" and product is "<<product<<"."<<endl;
+    }
+    calc(calc &obj)
+    {
+        n1=obj.n1;
+        n2=obj.n2;
+        sum = n1+n2;
+        product = n1*n2;
+        cout<<"Sum is "<<sum<<" and product is "<<product<<"."<<endl;
+    }
+};
+
+int main()
+{
+    calc ul;
+    calc ula(10,20);
+    calc ulat(ul);
+    calc ulate(ula);
+
+    return 0;
+}
\ No newline at end of file
diff --git a/college/constructor copy2.exe b/college/constructor copy2.exe
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diff --git a/college/constructor parameterized.cpp b/college/constructor parameterized.cpp
new file mode 100644
index 0000000..fb0fc22
--- /dev/null
+++ b/college/constructor parameterized.cpp	
@@ -0,0 +1,63 @@
+/*
+Wap to print sum, difference, product and remainfder of two numbers using 
+sum(), difference(), product() and remainder() functions by initializing using
+parameterized cinstructor.
+*/
+
+#include<iostream>
+
+using namespace std;
+
+class calc
+{
+    int x,y;
+public:
+    calc(int n1, int n2)
+    {
+        x=n1;
+        y=n2;
+    }
+
+    int sum()
+    {
+        int sum;
+        sum = x+y;
+        cout<<"sum: "<<sum<<endl;
+    }
+
+    int difference()
+    {
+        int diff;
+        diff = x-y;
+        cout<<"difference: "<<diff<<endl;
+    }
+
+    int product()
+    {
+        int product;
+        product = x*y;
+        cout<<"product: "<<product<<endl;
+    }
+
+    float remainder()
+    {
+        int rem;
+        rem = x%y;
+        cout<<"remainder: "<<rem<<endl;
+    }
+};
+
+int main()
+{
+    int num1, num2;
+    cout<<"Enter two numbers:\n";
+    cin>>num1>>num2;
+    
+    calc op(num1,num2);
+    op.sum();
+    op.difference();
+    op.product();
+    op.remainder();
+
+    return 0;
+}
\ No newline at end of file
diff --git a/college/constructor parameterized.exe b/college/constructor parameterized.exe
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diff --git a/college/constructor.cpp b/college/constructor.cpp
new file mode 100644
index 0000000..487cf55
--- /dev/null
+++ b/college/constructor.cpp
@@ -0,0 +1,21 @@
+#include<iostream>
+#include<conio.h>
+
+using namespace std;
+
+class counter
+{
+    int count;
+public:
+    counter(int num)
+    {
+        count = num;
+        cout <<"count: "<<count;
+    }
+};
+
+int main()
+{
+    counter c1(11);
+    return 0;
+}
\ No newline at end of file
diff --git a/college/constructor.exe b/college/constructor.exe
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index 0000000..7752c4b
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diff --git a/college/copy single inheritance.cpp b/college/copy single inheritance.cpp
new file mode 100644
index 0000000..67c4524
--- /dev/null
+++ b/college/copy single inheritance.cpp	
@@ -0,0 +1,55 @@
+#include<iostream>
+#include<conio.h>
+using namespace std;
+
+class Staff
+{
+    protected:
+        char name[50];
+        int id;
+
+    public:
+    void ReadData()
+    {
+        id = 201;
+        name = "Sita";
+    }
+
+    void DisplayData()
+    {
+        cout<<"Name:"<<name<<endl;
+        cout<<"ID:"<<id<<endl;
+    }
+};
+
+class Fulltime: public Staff
+{
+    private:
+        char post[50];
+    public:
+        void ReadData()
+        {
+            post = "CEO";
+        }
+        void DisplayData()
+        {
+            cout<<"Post:"<<post<<endl;
+        }
+};
+
+
+int main()
+{
+    Fulltime Sita;
+    
+    Sita.Staff::ReadData();
+    Sita.ReadData();
+
+    cout<<endl<<"Display data"<<endl;
+    
+    Sita.Staff::DisplayData();
+    Sita.DisplayData();
+    
+    getch();
+    return 0;
+}
\ No newline at end of file
diff --git a/college/copy single inheritance.exe b/college/copy single inheritance.exe
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diff --git a/college/data hiding.cpp b/college/data hiding.cpp
new file mode 100644
index 0000000..cd83cdf
--- /dev/null
+++ b/college/data hiding.cpp	
@@ -0,0 +1,27 @@
+#include<iostream>
+using namespace std;
+
+class Square
+{
+private:
+int num;
+
+public:
+    void getdata()
+    {
+        cout << "Enter the number"<<endl;;
+        cin>>num;
+    }
+    void display()
+    {
+        cout << "Square of a given number= "<< num*num<<endl;
+    }
+};
+
+int main()
+{
+    Square obj;
+    obj.getdata();
+    obj.display();
+    return 0;
+}
\ No newline at end of file
diff --git a/college/default constructor.cpp b/college/default constructor.cpp
new file mode 100644
index 0000000..0d42aa9
--- /dev/null
+++ b/college/default constructor.cpp	
@@ -0,0 +1,27 @@
+#include <iostream>
+using namespace std;
+
+class Complex
+{
+private:
+    int real,imag ;
+public:
+    Complex()
+    {
+        real=0;
+        imag=0;
+    }
+
+    void display( )
+    {
+        cout<<"Real part="<<real<<endl;
+        cout<<"Imaginary part="<<imag<<endl ;
+    }
+} ;
+
+int main( )
+{
+    Complex c1;
+    c1.display();
+    return 0;
+}
\ No newline at end of file
diff --git a/college/default vaule.cpp b/college/default vaule.cpp
new file mode 100644
index 0000000..2362e09
--- /dev/null
+++ b/college/default vaule.cpp	
@@ -0,0 +1,34 @@
+/* function
+WAP to make a proogram having packets of items like biscuits, chips, chocolates,and pastries 12,20,34 and 4 respectively. (se defalt arguments concepts)
+a) display the default values,
+b) display info with change in packets of biscuits to 90,
+c) display info with change in packets of chips to 100,
+d) display info with change in packets of chocolates to 20,
+e) display info with change in packets of chips to 80, pastries to 200,
+f) change everything and display
+
+*/
+
+#include<iostream>
+using namespace std;
+
+void items(int pb=12, int pc=20, int pch=34, int ppa=45)
+{
+    cout<<"packets of biscuits: "<<pb<<endl;
+    cout<<"packets of chips: "<<pc<<endl;
+    cout<<"packets of chocolates: "<<pch<<endl;
+    cout<<"packets of pastries: "<<ppa<<endl;
+    cout<<"----------------------------------"<<endl;
+}
+
+int main()
+{
+    items();            //default values -q.a
+    items(90);          //value of first item (biscuit) changes   -q.b
+    items(12,100);      //q.c
+    items(12,20,20);    //q.d
+    items(12,80,34,200);//q.e
+    items(9,8,10,7);    //q.f
+
+    return 0;
+}
\ No newline at end of file
diff --git a/college/default vaule.exe b/college/default vaule.exe
new file mode 100644
index 0000000..4629b3c
Binary files /dev/null and b/college/default vaule.exe differ
diff --git a/college/friend fuction 3.cpp b/college/friend fuction 3.cpp
new file mode 100644
index 0000000..37d8687
--- /dev/null
+++ b/college/friend fuction 3.cpp	
@@ -0,0 +1,21 @@
+/*
+friend function
+class 1 ->  2+3i
+class 2 -> 4-9i
+WAP to add two complex numbers
+*/
+
+#include<iostream>
+using namespace std;
+
+class c1
+{
+    float r1,i1;
+
+    void display(float a, float b)
+    {
+        r1=a;
+        i1=b;
+
+    }
+};
\ No newline at end of file
diff --git a/college/friend function 2.cpp b/college/friend function 2.cpp
new file mode 100644
index 0000000..3582f48
--- /dev/null
+++ b/college/friend function 2.cpp	
@@ -0,0 +1,53 @@
+/*
+friend function
+WAP to add numbers in twow classes and display the output
+*/
+
+
+#include<iostream>
+using namespace std;
+
+class first; 
+class second
+{
+    int num2;
+public:
+    void display()
+    {
+        cout<<"Enter a number: ";
+        cin>>num2;
+        cout<<"Num is "<<num2<<endl;
+    }
+    friend void addfxn(first obj1,second obj2);
+};
+
+class first
+{
+    int num;
+public:
+    void display()
+    {
+        cout<<"Enter a number: ";
+        cin>>num;
+        cout<<"Num is "<<num<<endl;
+    }
+    friend void addfxn(first obj1,second obj2);
+};
+
+void addfxn(first obj1,second obj2)
+{
+    int sum;
+    sum = obj1.num+obj2.num2;
+    cout<<"Sum of data of two function is "<<sum<<endl;
+}
+
+int main()
+{
+    first o1;
+    second o2;
+    o1.display();
+    o2.display();
+    addfxn(o1,o2);
+
+    return 0;
+}
\ No newline at end of file
diff --git a/college/friend function 4.cpp b/college/friend function 4.cpp
new file mode 100644
index 0000000..ed45c30
--- /dev/null
+++ b/college/friend function 4.cpp	
@@ -0,0 +1,55 @@
+/*
+friend function
+WAP to add two numbers in class 1 and two numbers in class 2 and display the output
+*/
+
+
+#include<iostream>
+using namespace std;
+
+class first;
+class second;
+ 
+class second
+{
+    int num2,num1;
+public:
+    void display()
+    {
+        cout<<"Enter two numbers: ";
+        cin>>num2>>num1;
+        cout<<"Numbers are "<<num2<<" and "<<num1<<endl;
+    }
+    friend void addfxn(first obj1,second obj2);
+};
+
+class first
+{
+    int num4,num3;
+public:
+    void display()
+    {
+        cout<<"Enter two number: ";
+        cin>>num3>>num4;
+        cout<<"Numbers are "<<num3<<" and "<<num4<<endl;
+    }
+    friend void addfxn(first obj1,second obj2);
+};
+
+void addfxn(first obj1,second obj2)
+{
+    int sum;
+    sum = obj1.num3+obj2.num2+obj1.num4+obj2.num1;
+    cout<<"Sum of data of two function is "<<sum<<endl;
+}
+
+int main()
+{
+    first o1;
+    second o2;
+    o1.display();
+    o2.display();
+    addfxn(o1,o2);
+
+    return 0;
+}
\ No newline at end of file
diff --git a/college/friend function 4.exe b/college/friend function 4.exe
new file mode 100644
index 0000000..b188ae6
Binary files /dev/null and b/college/friend function 4.exe differ
diff --git a/college/friend function 5.cpp b/college/friend function 5.cpp
new file mode 100644
index 0000000..08718c9
--- /dev/null
+++ b/college/friend function 5.cpp	
@@ -0,0 +1,58 @@
+/*
+friend function
+WAP to find the diffrerence between number of books of person 1 and person 2.
+*/
+
+#include<iostream>
+using namespace std;
+
+class person2;
+class person1;
+
+class person1
+{
+    int nob;        //number of books
+public:
+    void num()
+    {
+        cout<<"Enter your number of books"<<endl;
+        cin>>nob;
+    }
+
+    friend void diff(person1 obj1, person2 obj2);
+};
+
+class person2
+{
+    int nob;        //number of books
+public:
+    void num()
+    {
+        cout<<"Enter your number of books"<<endl;
+        cin>>nob;
+    }
+
+    friend void diff(person1 obj1, person2 obj2);
+};
+
+void diff(person1 obj1, person2 obj2)
+{
+    int diff;
+    if (obj1.nob > obj2.nob)
+        diff = obj1.nob - obj2.nob;
+    else
+        diff = obj2.nob - obj1.nob;
+
+    cout<<"The difference in your books is: "<<diff;
+}
+
+int main()
+{
+    person1 b1;
+    person2 b2;
+    b1.num();
+    b2.num();
+    diff(b1,b2);
+
+    return 0;
+}
\ No newline at end of file
diff --git a/college/friend function 5.exe b/college/friend function 5.exe
new file mode 100644
index 0000000..6ea5858
Binary files /dev/null and b/college/friend function 5.exe differ
diff --git a/college/friend function 6.cpp b/college/friend function 6.cpp
new file mode 100644
index 0000000..8ed7f0c
--- /dev/null
+++ b/college/friend function 6.cpp	
@@ -0,0 +1,52 @@
+    /*
+    friend function
+    WAP to find the product of period of BEIT 2nd sem and 4th sem
+    */
+
+    #include<iostream>
+    using namespace std;
+
+    class sem2;
+    class sem4;
+
+    class sem2{
+        int nop;        //number of periods
+    public:
+        void in()
+        {
+            cout<<"Enter your number of periods: ";
+            cin nop;
+        }
+
+        friend void product(sem2 o1, sem4 o2);
+    };
+
+    class sem4{
+        int nop;        //number of periods
+    public:
+        void in()
+        {
+            cout<<"Enter your number of periods: ";
+            cin nop;
+        }
+
+        friend void product(sem2 o1, sem4 o2);
+    };
+
+    friend void product(sem2 o1, sem4 o2)
+    {
+        int pro;
+        pro = o1.nop*o2.nop;
+        cout<<"Product of number of period is: "<<pro;
+    }
+
+    int main()
+    {
+        sem2 sec;
+        sem4 fou;
+        sec.in();
+        fou.in();
+        product(sec,fou);
+
+        return 0;
+    }
\ No newline at end of file
diff --git a/college/friend function.cpp b/college/friend function.cpp
new file mode 100644
index 0000000..616f5a2
--- /dev/null
+++ b/college/friend function.cpp	
@@ -0,0 +1,37 @@
+/*
+friend funciton
+wap to add 100 to num in a class using friend function
+*/
+
+#include<iostream>
+using namespace std;
+
+class first
+{
+    int num;
+public:
+    void display()
+    {
+        cout<<"Enter a number: ";
+        cin>>num;
+        cout<<"Num is "<<num<<endl;
+    }
+    
+    friend void frnfxn(first obj);     //friend return_type function_name(class_name object_name)
+};
+
+void frnfxn(first obj)
+{
+    int sum;
+    sum = obj.num + 100;
+    cout<<"100 added is "<<sum<<endl;
+}
+
+int main()
+{
+    first lass;
+    lass.display();
+    frnfxn(lass);       //fruend_fuction_name(object_name);
+    
+    return 0;   
+}
\ No newline at end of file
diff --git a/college/hello.cpp b/college/hello.cpp
new file mode 100644
index 0000000..e8cd9df
--- /dev/null
+++ b/college/hello.cpp
@@ -0,0 +1,7 @@
+#include<iostream>
+
+int main()
+{
+	std::cout<<"Hello, World!";
+	return 0;
+}
diff --git a/college/inheritance/hierarchical inheritance/mul.cpp b/college/inheritance/hierarchical inheritance/mul.cpp
new file mode 100644
index 0000000..f108037
--- /dev/null
+++ b/college/inheritance/hierarchical inheritance/mul.cpp	
@@ -0,0 +1,76 @@
+/*
+
+*/
+
+#include<iostream>
+
+using namespace std;
+
+class Numbers
+{
+protected:
+    int n1,n2,sum,diff,mul;
+};
+
+class Add:protected Numbers
+{
+public:
+    void getNumbers()
+    {
+        cout<<"Duita anka haalnuhoss: ";
+        cin>>n1>>n2;
+    }
+    void calcultaion()
+    {
+        sum=n1+n2;
+        cout<<endl<<"Tesko jod huncha: "<<sum;
+    }
+};
+
+class Sub:protected Numbers
+{
+public:
+    void getNumbers()
+    {
+        cout<<"Duita anka haalnuhoss: ";
+        cin>>n1>>n2;
+    }
+    void calcultaion()
+    {
+        diff=n1-n2;
+        cout<<endl<<"Tesko gathau huncha: "<<diff;
+    }
+};
+
+class Multiply:protected Numbers
+{
+public:
+    void getNumbers()
+    {
+        cout<<"Duita anka haalnuhoss: ";
+        cin>>n1>>n2;
+    }
+    void calcultaion()
+    {
+        mul=n1*n2;
+        cout<<endl<<"Tesko gudan huncha: "<<mul;
+    }
+};
+
+
+int main(void)
+{
+    Add anka;
+    anka.getNumbers();
+    anka.calcultaion();
+    cout<<endl;
+    Sub nka;
+    nka.getNumbers();
+    nka.calcultaion();
+    cout<<endl;
+    Multiply ka;
+    ka.getNumbers();
+    ka.calcultaion();
+
+    return 0;
+}
\ No newline at end of file
diff --git a/college/inheritance/hierarchical inheritance/mul.exe b/college/inheritance/hierarchical inheritance/mul.exe
new file mode 100644
index 0000000..20cd7c9
Binary files /dev/null and b/college/inheritance/hierarchical inheritance/mul.exe differ
diff --git a/college/inheritance/multiple inheritance/sum.cpp b/college/inheritance/multiple inheritance/sum.cpp
new file mode 100644
index 0000000..a3be6a5
--- /dev/null
+++ b/college/inheritance/multiple inheritance/sum.cpp	
@@ -0,0 +1,44 @@
+#include<iostream>
+using namespace std;
+
+class Numbre1
+{
+protected:
+    int Num1;
+public:
+    void ask1()
+    {
+        cout<<"Pahilo anka: ";
+        cin>>Num1;
+    }
+};
+
+class Numbre2
+{
+protected:
+    int Num2;
+public:
+    void ask2()
+    {
+        cout<<"Pahilo anka: ";
+        cin>>Num2;
+    }
+};
+
+class Sum:public Numbre1,Numbre2
+{
+public:
+    void um()
+    {
+        cout<<"Sum is "<<Num1+Num2;
+    }
+};
+
+int main()
+{
+    Sum add;
+    Sum.Num1 = Numbre1.Num1;
+    Sum.Num2 = Numbre2.Num2;
+    add.um
+    return 0;
+}
\ No newline at end of file
diff --git a/college/inheritance/single  inheritance/p1 b/college/inheritance/single  inheritance/p1
new file mode 100644
index 0000000..0a3602e
Binary files /dev/null and b/college/inheritance/single  inheritance/p1 differ
diff --git a/college/inheritance/single  inheritance/p1.cpp b/college/inheritance/single  inheritance/p1.cpp
new file mode 100644
index 0000000..bf1040c
--- /dev/null
+++ b/college/inheritance/single  inheritance/p1.cpp	
@@ -0,0 +1,41 @@
+/*WAP to create a class called fruit with constructor displaying "i am fruit".
+Create a derived class named Banana with constructor displaying "i am banana".
+i. Make object of fruit only
+ii. Make object of banana only
+iii. Make objects of both fruit and mango
+*/
+
+#include<iostream>
+
+using namespace std;
+
+class Fruit
+{
+public:
+    Fruit()
+    {
+        cout<<"i am fruit";
+    }
+};
+
+class Banana:public Fruit
+{
+public:
+    Banana()
+    {
+        cout<<"i am banana";
+    }
+};
+
+int main()
+{
+    cout<<"i. Make object of fruit only"<<endl;
+    Fruit fr;
+    cout<<endl<<endl<<"ii. Make object of banana only"<<endl;
+    Banana bn;
+    cout<<endl<<endl<<"iii. Make objects of both fruit and mango"<<endl;
+    Fruit ft;
+    Banana baanaanaa;
+
+    return 0;
+}
\ No newline at end of file
diff --git a/college/inheritance/single  inheritance/p1.exe b/college/inheritance/single  inheritance/p1.exe
new file mode 100644
index 0000000..8240de4
Binary files /dev/null and b/college/inheritance/single  inheritance/p1.exe differ
diff --git a/college/inheritance/single  inheritance/sum.cpp b/college/inheritance/single  inheritance/sum.cpp
new file mode 100644
index 0000000..81611cd
--- /dev/null
+++ b/college/inheritance/single  inheritance/sum.cpp	
@@ -0,0 +1,38 @@
+/*
+Single Inheritance -- base class = Numbers -- *n1,*n2,*sum  
+                    -- derived class = Add -- +getNumbers(), +addition()
+*/
+
+#include<iostream>
+
+using namespace std;
+
+class Numbers
+{
+protected:
+    int n1,n2,sum;
+};
+
+class Add:protected Numbers
+{
+public:
+    void getNumbers()
+    {
+        cout<<"Duita anka haalnuhoss: ";
+        cin>>n1>>n2;
+    }
+    void addition()
+    {
+        sum=n1+n2;
+        cout<<endl<<"Tesko jod huncha: "<<sum;
+    }
+};
+
+int main(void)
+{
+    Add anka;
+    anka.getNumbers();
+    anka.addition();
+
+    return 0;
+}
\ No newline at end of file
diff --git a/college/inheritance/single  inheritance/sum.exe b/college/inheritance/single  inheritance/sum.exe
new file mode 100644
index 0000000..e2b4eee
Binary files /dev/null and b/college/inheritance/single  inheritance/sum.exe differ
diff --git a/college/inline.cpp b/college/inline.cpp
new file mode 100644
index 0000000..af53840
--- /dev/null
+++ b/college/inline.cpp
@@ -0,0 +1,18 @@
+#include<iostream>
+
+using namespace std;
+
+inline int max(int a, int b)
+{
+    return (a>b)?a:b;
+}
+
+int main()
+{
+    int x,y;
+    cout<<"Enter x and y:"<<endl;
+    cin>>x>>y;
+    cout<<"Maximum value is:"<<max(x,y);
+
+    return 0;
+}
diff --git a/college/message passing.cpp b/college/message passing.cpp
new file mode 100644
index 0000000..c80cc4b
--- /dev/null
+++ b/college/message passing.cpp	
@@ -0,0 +1,28 @@
+#include<iostream>
+#include<conio.h>
+using namespace std;
+
+class student
+{
+    int roll;
+public:
+    void getdata(int x)
+    {
+        roll=x;
+    }
+
+    void display()
+    {
+    cout<<"Roll number="<<roll;
+    }
+};
+
+
+int main()
+{
+    student s;
+    s.getdata(325); //objects passing message
+    s.display(); //objects passing message
+    getch();
+    return 0;
+}
\ No newline at end of file
diff --git a/college/prisha.cpp b/college/prisha.cpp
new file mode 100644
index 0000000..d8f1c5c
--- /dev/null
+++ b/college/prisha.cpp
@@ -0,0 +1,37 @@
+/*
+WAP to add, substract,product and reminder of two numbers in display() function using default 
+constructor
+*/
+
+#include<iostream>
+using namespace std;
+
+class Number
+{
+private:
+    int n1,n2;
+public:
+    Number()
+    {
+        n1=4;
+        n2=8;
+    }
+
+    display()
+    {
+        int add,sub,pro,rem;
+        add= n1+n2;
+        sub= n1-n2;
+        pro= n1*n2;
+        rem= n1%n2;
+        cout<<"Add: "<<add<<" Sub: "<<sub<<" Prouct: "<<pro<<" Rem: "<<rem<<endl;
+    }
+};
+
+int main()
+{
+    Number no;
+    no.display();
+
+    return 0;
+}
\ No newline at end of file
diff --git a/college/prisha.exe b/college/prisha.exe
new file mode 100644
index 0000000..afb1341
Binary files /dev/null and b/college/prisha.exe differ
diff --git a/college/pure virtual function.cpp b/college/pure virtual function.cpp
new file mode 100644
index 0000000..5a511b5
--- /dev/null
+++ b/college/pure virtual function.cpp	
@@ -0,0 +1,32 @@
+#include<iostream>
+using namespace std;
+
+class A
+{
+public:
+    virtual void disp()=0;
+};
+
+class B:public A
+{
+public:
+    void disp()
+    {
+        cout<<"Pure Virtual Function";
+    }
+};
+
+int main()
+{
+A *p;
+B o;
+p = &o;
+p -> disp();
+return 0;
+}
+
+/*
+
+Pure Virtual Function
+
+*/
diff --git a/college/rabin code.cpp b/college/rabin code.cpp
new file mode 100644
index 0000000..82da8d6
--- /dev/null
+++ b/college/rabin code.cpp	
@@ -0,0 +1,61 @@
+#include <iostream>
+#include <stdlib.h>
+using namespace std;
+main()
+{
+   start:
+    system("cls");
+    int h = 0, m = 0, s = 0;
+    // again for setting an alarm which produces sound for efficiency
+    int h1 = 0, m1 = 0, s1 = 0;
+    cout << "Enter in the proper format of HH:MM:SS" << endl;
+    cin >> h >> m >> s;
+    cout << "set the alaem in proper time format of HH:MM:SS" << endl;
+    cin >> h1 >> m1 >> s1;
+    if (h < 24 && m < 60 && s < 60)
+    {
+     
+
+        for (h = 0; h < 24; h++)
+        {
+            for (m = 0; m < 60; m++)
+            {
+                for (s = 0; s < 60; s++)
+                {
+		            system("cls");
+                    // This above code will cler the existing data
+                    // This above code will cler the existing data
+                    cout << h << ":" << m << ":" << s;
+                    // for checkiung of and determination of AM and PM
+                    if (h < 12)
+                    {
+                        cout << "PM";
+                    }
+                    else
+                    {
+                        cout << "AM";
+                    }
+                    if (h == h1 && m == m1 && s == s1)
+                    {
+                        cout<<"play the alarm"<<endl;
+                    }
+                    for (double i = 0; i < 99999999; i++)
+                    {
+                        i++;
+                        i--;
+                        // this will stop the time at each of the count of one  second
+                    }
+                }
+                s = 0;
+            }
+            m = 0;
+        }
+        h = 0;
+        goto start;
+    }
+
+    else
+    {
+        cout << "Enter the authentic correct time format HH:MM:SS" << endl;
+    }
+}
\ No newline at end of file
diff --git a/college/rabin code.exe b/college/rabin code.exe
new file mode 100644
index 0000000..3029410
Binary files /dev/null and b/college/rabin code.exe differ
diff --git a/college/single inheritance.cpp b/college/single inheritance.cpp
new file mode 100644
index 0000000..204fb02
--- /dev/null
+++ b/college/single inheritance.cpp	
@@ -0,0 +1,49 @@
+#include<iostream>
+#include<string.h>
+using namespace std;
+
+class Staff
+{
+privte:
+    int id;
+    string name;
+public:
+    void ReadData(int i, string n)
+    {
+        id = i;
+        name = n;
+    }
+    void DisplayData()
+    {
+        cout<<"ID: "<<id<<endl;
+        cout<<"Name: "<<name;
+    }
+};
+
+class Fulltime:public Staff
+{
+private:
+    string post;
+public:
+    void ReadData(int i, string n, string p)
+    {
+        post = p;
+    }
+    void DisplayData()
+    {
+        cout<<"Post: "<<post;
+    }
+};
+
+int main()
+{
+    Fulltime Sita;
+
+    Sita.Staff::ReadData(900, "Sita");
+    Sita.ReadData("CEO");
+    Sita.Staff::DisplayData();
+    Sita.DisplayData();
+
+    return 0;
+}
+
diff --git a/college/single inheritance.exe b/college/single inheritance.exe
new file mode 100644
index 0000000..11a3af1
Binary files /dev/null and b/college/single inheritance.exe differ
diff --git a/college/static member.cpp b/college/static member.cpp
new file mode 100644
index 0000000..3b6c498
--- /dev/null
+++ b/college/static member.cpp	
@@ -0,0 +1,39 @@
+#include<iostream>
+using namespace std;
+
+class items
+{
+char name[20];
+float price;
+static int counter;
+
+public:
+void IO();
+static void Counter();
+};
+
+int items::counter={0};
+void items::IO()
+{
+    cout<<"Enter a name and price of item: "<<endl;
+    cin>>name>>price;
+    cout<<"Name is "<<name<<" and price is "<<price<<endl;
+    counter++;
+}
+void items::Counter()
+{
+    cout<<"Counter: "<<counter<<endl;
+}
+
+int main()
+{
+    items i1,i2,i3;
+    i1.IO();
+    i1.Counter();
+    i2.IO();
+    i2.Counter();
+    i3.IO();
+    i3.Counter();
+
+    return 0;
+}
\ No newline at end of file
diff --git a/college/stirng_test_check.c++ b/college/stirng_test_check.c++
new file mode 100644
index 0000000..475ac26
--- /dev/null
+++ b/college/stirng_test_check.c++
@@ -0,0 +1,37 @@
+#include<iostream>
+using namespace std;
+
+class stirng_test_check
+{
+private:
+    string name;
+public:
+    stirng_test_check();
+    ~stirng_test_check();
+};
+
+stirng_test_check::stirng_test_check()
+{
+    cout<<"Enter your name : ";
+    cin>>name;
+}
+
+stirng_test_check::~stirng_test_check()
+{
+        // cout<<"Enter your name : ";
+        // cin>>name;
+        
+}
+
+int main()
+{
+    stirng_test_check h[3];
+    for (int i = 0; i < 3; i++)
+    {
+        sting
+    }
+    
+   // stirng_test_check();
+    return 0;
+
+}
diff --git a/college/stirng_test_check.exe b/college/stirng_test_check.exe
new file mode 100644
index 0000000..c09eae1
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diff --git a/college/tempCodeRunnerFile.cpp b/college/tempCodeRunnerFile.cpp
new file mode 100644
index 0000000..fb0fc22
--- /dev/null
+++ b/college/tempCodeRunnerFile.cpp
@@ -0,0 +1,63 @@
+/*
+Wap to print sum, difference, product and remainfder of two numbers using 
+sum(), difference(), product() and remainder() functions by initializing using
+parameterized cinstructor.
+*/
+
+#include<iostream>
+
+using namespace std;
+
+class calc
+{
+    int x,y;
+public:
+    calc(int n1, int n2)
+    {
+        x=n1;
+        y=n2;
+    }
+
+    int sum()
+    {
+        int sum;
+        sum = x+y;
+        cout<<"sum: "<<sum<<endl;
+    }
+
+    int difference()
+    {
+        int diff;
+        diff = x-y;
+        cout<<"difference: "<<diff<<endl;
+    }
+
+    int product()
+    {
+        int product;
+        product = x*y;
+        cout<<"product: "<<product<<endl;
+    }
+
+    float remainder()
+    {
+        int rem;
+        rem = x%y;
+        cout<<"remainder: "<<rem<<endl;
+    }
+};
+
+int main()
+{
+    int num1, num2;
+    cout<<"Enter two numbers:\n";
+    cin>>num1>>num2;
+    
+    calc op(num1,num2);
+    op.sum();
+    op.difference();
+    op.product();
+    op.remainder();
+
+    return 0;
+}
\ No newline at end of file
diff --git a/college/tempCodeRunnerFile.exe b/college/tempCodeRunnerFile.exe
new file mode 100644
index 0000000..90b3356
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diff --git a/college/template/2parameter.cpp b/college/template/2parameter.cpp
new file mode 100644
index 0000000..2b858db
--- /dev/null
+++ b/college/template/2parameter.cpp
@@ -0,0 +1,22 @@
+#include<iostream>
+using namespace std;
+
+template<class A,class B>
+void maximum(A first, B second)
+{
+	if(first>second)
+        {
+                cout<<first;
+        }
+        else
+        {
+                cout<<second;
+        }
+}
+
+int main()
+{
+        cout<<"Using different datatypes -- int , float "<<maximum(4,3.98)<<endl;
+	return 0;
+}
+
diff --git a/college/template/cit b/college/template/cit
new file mode 100644
index 0000000..f6f7ffe
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diff --git a/college/template/classin template.cpp b/college/template/classin template.cpp
new file mode 100644
index 0000000..0d40687
--- /dev/null
+++ b/college/template/classin template.cpp	
@@ -0,0 +1,25 @@
+#include<iostream>
+using namespace std;
+
+template<class T>
+class Test
+{
+    T a;
+public:
+    void add(T x, T y)
+    {
+        a = x+y;
+    }
+    void show()
+    {
+        cout<<a<<endl;
+    }
+};
+
+int main()
+{
+    Test<float>te;
+    te.add(12.2f,2.21f);
+    te.show();
+    return 0;
+}
diff --git a/college/template/classtemplateformat b/college/template/classtemplateformat
new file mode 100644
index 0000000..d673134
--- /dev/null
+++ b/college/template/classtemplateformat
@@ -0,0 +1,18 @@
+//format foe class multiple class template, with multiple parametere
+
+/* practice quiestions:
+1. Make a class template what will show the addition and subbtraction of two float numbers.
+2. Make a class template what will show the multiplication and division of two integer numbers.
+3. Make a class template that wil display three things(integer, float and character)
+*/
+
+template<class T1, class T2,.....>
+class class_name
+{
+........
+.....//Body of class
+.....
+};
+
+Object:
+class_name<type 1,type 2>object name;
diff --git a/college/template/format b/college/template/format
new file mode 100644
index 0000000..4e9510b
--- /dev/null
+++ b/college/template/format
@@ -0,0 +1,15 @@
+//Template Format::
+
+template <class template_name>
+class class_name
+{
+
+..............//class member
+..............//specifications with
+..............//anonymous type T
+..............//where or approproate
+
+};
+
+Object:
+class_name <Type> object_name;
diff --git a/college/template/max b/college/template/max
new file mode 100644
index 0000000..649c2f3
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diff --git a/college/template/max.cpp b/college/template/max.cpp
new file mode 100644
index 0000000..c1fe046
--- /dev/null
+++ b/college/template/max.cpp
@@ -0,0 +1,24 @@
+#include<iostream>
+using namespace std;
+
+template<class T>		//Template Function declaration
+T maximum(T first, T second)	//Template Function definition
+{
+	if(first>second)
+	{
+		return first;
+	}
+	else
+	{
+		return second;
+	}
+}
+
+int main()
+{
+	cout<<"The highest interger number is: "<<maximum(4,3)<<endl;
+	cout<<"The highest float number is: "<<maximum(10.522,5.633)<<endl;
+	//doesn't work with different parameters -- (2,3.2) (int,float) doesn't work.
+	return 0;
+}
+
diff --git a/college/template/mcmt1 b/college/template/mcmt1
new file mode 100644
index 0000000..3e6a091
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diff --git a/college/template/mcmt1.cpp b/college/template/mcmt1.cpp
new file mode 100644
index 0000000..569267c
--- /dev/null
+++ b/college/template/mcmt1.cpp
@@ -0,0 +1,45 @@
+// 1. Make a class template what will show the addition and subbtraction of two float numbers.
+//2. Make a class template what will show the multiplication and division of two integer numbers.
+
+
+
+#include<iostream>
+using namespace std;
+
+template<class I, class F>
+class AB
+{
+    F add, sub;
+    I  mul, div;
+public:
+    void Add(F a, F b)
+    {
+        add = a + b;
+        cout<<"The addition is "<<add<<endl;
+    }
+    void Sub(F a, F b)
+    {
+        sub = a - b;
+        cout<<"The subbtraction  "<<sub<<endl;
+    }
+    void Mul(I a, I b)
+    {
+        mul = a * b;
+        cout<<"The multiplication is "<<mul<<endl;
+    }
+    void Div(I a, I b)
+    {
+        div = a / b;
+        cout<<"The division is "<<div<<endl;
+    }
+};
+
+int main()
+{
+    AB<int,float>ab;
+    ab.Add(21.2,21.2);
+    ab.Sub(22.1,2.21);
+    ab.Mul(1,2);
+    ab.Div(2,1);
+    return 0;
+}
diff --git a/college/template/mul3 b/college/template/mul3
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index 0000000..3b6a96c
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diff --git a/college/template/multiplication b/college/template/multiplication
new file mode 100644
index 0000000..5d971d6
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diff --git a/college/template/multiplication.cpp b/college/template/multiplication.cpp
new file mode 100644
index 0000000..c87ebb5
--- /dev/null
+++ b/college/template/multiplication.cpp
@@ -0,0 +1,16 @@
+#include<iostream>
+using namespace std;
+
+template<class T>
+T mul(T n1, T n2)
+{
+        return n1*n2;
+}
+
+int main()
+{
+        cout<<"The multiplication of two integers is: "<<mul(12,21)<<endl;
+        cout<<"The multiplication of two floats is: "<<mul(1.23,3.21)<<endl;
+        return 0;
+}
+
diff --git a/college/template/multiply3.cpp b/college/template/multiply3.cpp
new file mode 100644
index 0000000..661575d
--- /dev/null
+++ b/college/template/multiply3.cpp
@@ -0,0 +1,15 @@
+#include<iostream>
+using namespace std;
+
+template<class T>               //single parameter
+T mul(T n1, T n2, T n3)
+{
+        return n1*n2*n3;
+}
+
+int main()
+{
+        cout<<"The multiplication of two integers is: "<<mul(12,21,2)<<endl;
+        cout<<"The multiplication of two floats is: "<<mul(1.23,3.21,2.1)<<endl;
+        return 0;
+}
diff --git a/college/template/sum b/college/template/sum
new file mode 100644
index 0000000..f03089a
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diff --git a/college/template/sum.cpp b/college/template/sum.cpp
new file mode 100644
index 0000000..7c4e3e0
--- /dev/null
+++ b/college/template/sum.cpp
@@ -0,0 +1,16 @@
+#include<iostream>
+using namespace std;
+
+template<class T>
+T sum(T n1, T n2)
+{
+	return n1+n2;
+}
+
+int main()
+{
+	cout<<"The sum of two integers is: "<<sum(12,21)<<endl;
+	cout<<"The sum of two floats is: "<<sum(1.23,3.21)<<endl;
+	return 0;
+}
+
diff --git a/college/template/sumcq b/college/template/sumcq
new file mode 100644
index 0000000..f03089a
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diff --git a/college/template/sumforcoreq b/college/template/sumforcoreq
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index 0000000..f03089a
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diff --git a/college/test_string.c++ b/college/test_string.c++
new file mode 100644
index 0000000..1c74f22
--- /dev/null
+++ b/college/test_string.c++
@@ -0,0 +1,53 @@
+#include <iostream>
+#include <string>
+using namespace std;
+class info
+{
+    string name[100];
+    static int count;
+
+public:
+    void input()
+    {
+        static int n = 1;
+        cout << "Press 0 for exit :" << endl;
+        for (int i = 1; i <= n; i++)
+        {
+            cout << "name of the item :";
+            cin >> name[i];
+
+            if (name[i] == "0")
+            {
+                break;
+            }
+
+            else
+            {
+                count++;
+                n++;
+            }
+        }
+    }
+    void output()
+    {
+        cout << endl;
+        for (int i = 1; i <= count; i++)
+        {
+            cout << "name of the item :" << name[i] << endl;
+        }
+    }
+    static void displaycount()
+    {
+        cout << "The total no. of items stored is : " << count << endl;
+    }
+};
+int info::count;
+int main()
+{
+    system("cls");
+    info i;
+    i.input();
+    i.output();
+    info::displaycount();
+    return 0;
+}
diff --git a/college/test_string.exe b/college/test_string.exe
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index 0000000..bd97676
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diff --git a/college/virtualfxn.cpp b/college/virtualfxn.cpp
new file mode 100644
index 0000000..87b22b4
--- /dev/null
+++ b/college/virtualfxn.cpp
@@ -0,0 +1,29 @@
+#include<iostream>
+using namespace std;
+
+class Base
+{
+public:
+    virtual void disp()
+    {
+        cout<<"Base Class";
+    }
+};
+
+class Derived: public Base
+{
+public:
+    void disp()
+    {
+        cout<<"Derived Class";
+    }
+};
+
+int main()
+{
+    Base *p;    //pointer
+    Derived d;  //object
+    p = &d;     //pointer pointing to object of derived class
+    p -> disp();    //invokes function of derived class
+    return 0;
+}
diff --git a/college/virtualfxn2.cpp b/college/virtualfxn2.cpp
new file mode 100644
index 0000000..245b0dc
--- /dev/null
+++ b/college/virtualfxn2.cpp
@@ -0,0 +1,47 @@
+#include<iostream>
+using namespace std;
+
+class Base
+{
+public:
+    virtual void print()    //virtual in base clsas doesn't get invoked
+    {
+        cout<<"Print base class"<<endl;
+    }
+    void show()
+    {
+        cout<<"Show base class"<<endl;    
+    }
+};
+
+class Derived: public Base
+{
+public:
+    void print()
+    {
+        cout<<"Print derived class"<<endl;
+    }
+    void show()
+    {
+        cout<<"Show derived class"<<endl;    
+    }
+};
+
+int main()
+{
+    Base *bptr;
+    Derived d;
+    btpr = &d;
+
+    bptr -> print();    //virtaual function bind at runtime
+    bptr -> show();     //non virtual function. bind at compile time
+    return 0;
+}
+
+/*
+
+
+Print Derived Class
+Show Derived Class
+
+*/