#include <stdio.h>
#include <stdlib.h>
#define max 10


struct stack
{

     int top;
     int items[max];


}s;
void push();
void pop();
void display();

void main()
{
    s.top=-1;
     int choice;
     top1:

     printf("1.push\n2.pop\n3.display\n4.exit");
     scanf("%d",&choice);
     switch(choice){
     case 1:
     push();
     break;
     case 2:
     pop();
     break;
     case 3:
     display();
     break;
     case 4:
     exit(0);
     default:
     printf("Enter number in range: ");
     }
     goto top1;
}


void push(){
if((s.top)==max-1)
{
    printf("Stack overflow");
}
else{
    int d;
 s.top=s.top+1;
    printf("Enter the element: ");
    scanf("%d",&s.items[s.top]);


}
}

void pop(){
    if(s.top==-1)
    {
        printf("Stack underflow");
    }
s.top=s.top-1;

}


void display(){
    printf("The element are");
    printf("\n [");
    int i;
for(i=0;i<=s.top;i++)
{

printf(" %d ",s.items[i]);
       }
       printf("]");


}