#include <iostream.h>
class Stack
{
   private:
      int st[100];
      int top;
   public:
      Stack()
      { top = 0; }
      void push(int var)
      { st[top++] = var; }
      int pop()
      { return st[--top]; }
};

void main()
{
   Stack s1;
   s1.push(1);
   s1.push(2);
   cout << s1.pop() << endl;
}