Create stack_array_implementation.cpp

stack_array_implementation.cpp

@@ -0,0 +1,57 @@
+#include <iostream>
+using namespace std;
+
+struct mystack
+{
+    int *arr;
+    int cap;
+    int top;
+
+    mystack(int c)
+    {
+        cap = c;
+        arr = new int[cap];
+        top = -1;
+    }
+
+    void push(int x)
+    {
+        top++;
+        arr[top] = x;
+    }
+
+    int pop()
+    {
+        int res = arr[top];
+        top--;
+        return res;
+    }
+
+    int peek()
+    {
+        return arr[top];
+    }
+
+    int size()
+    {
+        return (top + 1);
+    }
+
+    // can use bool function like this only no need to put the false condition in the else part
+    bool isempty()
+    {
+        return (top == -1);
+    }
+};
+int main(void)
+{
+    mystack s(5);
+    s.push(5);
+    s.push(10);
+    s.push(20);
+    cout << s.pop() << endl;
+    cout << s.size() << endl;
+    cout << s.peek() << endl;
+    cout << s.isempty() << endl;
+    return 0;
+}