#include<iostream>
#include<conio.h>
#include<stdlib.h>
using namespace std;
class stack
{
             int stk[5];
             int top;
      public:
             stack()
              {
                top=-1;
               }
             void push(int x)
              {
                 if(top >  4)
                       {
                           cout <<"stack over flow";
                           return;
                       }
                 stk[++top]=x;
                 cout <<"inserted" <<x;
               }
             void pop()
               {
                  if(top <0)
                   {
                         cout <<"stack under flow";
                         return;
                    }
                    cout <<"deleted" <<stk[top--];
                }
             void display()
               {
                   if(top<0)
                    {
                            cout <<" stack empty";
                            return;
                    }
                    for(int i=top;i>=0;i--)
                    cout <<stk[i] <<" ";
                }
};
 
main()
{
     int ch;
     stack st;
     while(1)
        {
             cout <<"\n1.push  2.pop  3.display  4.exit\nEnter ur choice";
             cin >> ch;
             switch(ch)
              {
               case 1:  cout <<"enter the element";
                        cin >> ch;
                        st.push(ch);
                        break;
               case 2:  st.pop();  break;
               case 3:  st.display();break;
               case 4:  exit(0);
               }
         }
return (0);
}

OUTPUTS
 1.push  2.pop  3.display  4.exit
 Enter ur choice2
 stack under flow
 1.push  2.pop  3.display  4.exit
 Enter ur choice1
 enter the element2

inserted2
1.push  2.pop  3.display  4.exit
 Enter ur choice1
 enter the element3
 inserted3

1.push  2.pop  3.display  4.exit
 Enter ur choice2
 deleted3

1.push  2.pop  3.display  4.exit
 Enter ur choice1
 enter the element5
 inserted5

1.push  2.pop  3.display  4.exit
 Enter ur choice3
 5 2

1.push  2.pop  3.display  4.exit
 Enter ur choice4

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