#include<iostream.h>
#include<conio.h>
#include<stdlib.h>

int top=-1;

void pushfunc(void);
void popfunc(void);

class stack
{
private:

int array[10];

public:

void push(void)
{
if(top==9)
{
cout<<"Over flow ";getch();
}
else
{
cin>>array[++top];
}
}

void pop(void)
{
if(top<=-1)
{
cout<<"Under flow "<<endl;
}
else
{
cout<<array[top--]<<endl;
}
}
};

stack s;
int n=0;

void main(void)
{
int choice;
do
{
clrscr();
cout<<"================ STACK OPERATIONS ============ "<<endl<<endl;
cout<<"[1] Push  operation "<<endl;
cout<<"[2] Pop   operation "<<endl;
cout<<"[3] Value of top "<<endl;
cout<<"[4] Exit "<<endl<<endl;
cout<<"Enter any of the above choices to perform any operation ";
cin>>choice;

switch(choice)
{
case 1:
pushfunc();
continue;

case 2:
popfunc();
continue;

case 3:
clrscr();
cout<<top;getch();
continue;

case 4:
break;

default:
break;
}
}while(choice!=4);
}

void pushfunc(void)
{
char ans;

do
{
clrscr();
cout<<"Enter value ";

s.push();
n++;
cout<<"\n\nWant to enter more ( y , n ) ";
ans = getche();
}while(ans!='n');
}

void popfunc(void)
{
clrscr();
for(int i=0; i<n; i++)
{
s.pop();
}
getch();
}