MatrixComputation.cpp

#include<bits/stdc++.h>
using namespace std;
#define sk 100
class matrix
{
public:
int i,j,k,sum,r1,r2,c1,c2;
int m1[sk][sk],m2[sk][sk];
char reply;
void getin(void);
void mply(void);
void add(void);
void minus(void);
void read(void);
void input(void);
};
void matrix::getin()
{
cout<<"                   WELCOME TO SOLUTION OF TWO MATRICRES ";
cout<<endl;

cout<<"YOU CAN CALCULATE UPTO A LIMIT OF MATRIX 100 * 100 \n";
cout<<"YOU CAN DO THE FOLLOWING :ADDITION SUBTRACTION \n";
cout<<"MULTIPLICATION AND READ ONLY \n";
cout<<" DO YOU WANT TO CONTINUE [Y/N] : ";
cin >>reply;
if(reply=='y'||reply=='Y')
{
cout<<"\nEnter the number of rows and columns of matrix 1 : ";
cin>>r1>>c1;
cout<<"\nEnter the value of matrix 1 : "<<endl;
for(i=0;i<r1;i++)
   for(j=0;j<c1;j++)
   cin>>m1[i][j];
cout<<"\nEnter the number of rows and columns of matrix 2 : ";
cin>>r2>>c2;
cout<<"\nEnter the value of matrix 2 : "<<endl;
for(i=0;i<r2;i++)
   for(j=0;j<c2;j++)
   cin>>m2[i][j];
}
else exit(0);
}
void matrix::mply()
{
cout<<"THE RESULT AFTER MULTIPLICATION IS :";
if(c1==r2)
{
for(i=0;i<r1;i++)
   {
   cout<<endl;
   for(j=0;j<c2;j++)
   {
   sum=0;
   for(k=0;k<c1;k++)
   sum+=m1[i][k]*m2[k][j];
   cout<<setw(6)<<sum;
   }
   }
}
else
	{
	cout<<"\nNVALID INPUT ";
	cout<<"\nMULTIPLICATION NOT POSSIBLE ";
	}
}
void matrix::add()
{
cout<<"\nTHE RESULT AFTER ADDITION IS :";
if(r1==r2&&c1==c2)
{
for(i=0;i<r1;i++)
   {
   cout<<endl;
   for(j=0;j<c1;j++)
   cout<<setw(3)<<(m1[i][j]+m2[i][j]);
   }
}
else
	{
	cout<<"\nINVALID INPUT ";
	cout<<"\nADDITION NOT POSIIBLE ";
	}
}
void matrix::minus()
{
cout<<"\nTHE RESULT AFTER SUBTRACTION IS :";
if(r1==r2&&c1==c2)
{
for(i=0;i<r1;i++)
   {
   cout<<endl;
   for(j=0;j<c1;j++)
   cout<<setw(3)<<(m1[i][j]-m2[i][j]);
   }
}
else
	{
	cout<<"\nINVALID INPUT ";
	cout<<"\nSUBTRACTION NOT POSSIBLE ";
	}

}
void matrix::read()
{
cout<<" ENTERED MATRIX 1 IS :\n";
for(i=0;i<r1;i++)
   {
   cout<<endl;
   for(j=0;j<c1;j++)
   cout<<setw(3)<<m1[i][j];
   }
cout<<endl;
cout<<"ENTERED MATRIX 2 IS :\n";
for(i=0;i<r2;i++)
   {
   cout<<endl;
   for(j=0;j<c2;j++)
   cout<<setw(3)<<m2[i][j];
   }
}
int main()
{
int ans,option;
char response;
matrix m;

start :
m.getin();
again :
cout<<"\nWhat you wish to do : "<<endl;
cout<<"1.ADDITION ";
cout<<"2.SUBTRACTION ";
cout<<"3.MULTIPLY ";
cout<<"4.READ ONLY ";
cout<<"5.EXIT \n";
cout<<"\nENTER YOUR CHOICE IN NUMBERS : ";
repeat :
cin>>ans;
switch(ans)
{
case 1 : m.add(); break;
case 2 : m.minus(); break;
case 3 : m.mply(); break;
case 4 : m.read(); break;
case 5 : goto exit ;
default :
{
cout<<"INVALID ENTRY ENTER YOUR CHOICE AGAIN : \n";
goto repeat;
}
}
cout<<"\nDO YOU WANT TO DO IT FOR ANOTHER TIME [Y/N] :";
cin>>response;
if(response=='y'||response=='Y')
{
wrong:
cout<<"\nEnter your choice in number ";
cout<<"\n1.FOR Same matrix 2.FOR Another matrix";
cin>>option;
switch(option)
{
case 1 : goto again;
case 2 : goto start;
default: cout<<"\nINVALID ENTRY ";
    goto wrong;
}
}
exit :
return 0;
}