stack

#include<stdio.h>
#define MAX 5
int stack[MAX],top=-1;
void push()
{
    int value;
    if(top==MAX-1)
    {
        printf("\nstack is full\n");
    }
    else
    {
        printf("enter the value to push in the stack:");
        scanf("%d",&value);
        top++;
        stack[top]=value;
    }
}
void pop()
{
    if(top==-1)
    {
        printf("\nstack is empty\n");
    }
    else
    {
        printf("deleted element is %d",stack[top]);
        top--;
    }
}
void display()
{
    if(top>=0)
    {
        printf("stack elements:\n");
        for(int i=top;i>=0;--i)
        {
            printf("%d\n",stack[i]);
        }
    }
    else if(top==-1)
    {
        printf("\nstack is empty\n");
    }
}
int main()
{
    int exit=0;
    for(int x=0;x<=100;x++)
    {
        printf("\npress 1 to push the element in stack\n");
        printf("press 2 to pop the element from stack\n");
        printf("press 3 to display the elements\n");
        printf("press 4 for exit\n");
        printf("NOTE: max input 5\n");
        int ch;
        printf("enter your choice:");
        scanf("%d",&ch);
        switch (ch)
        {
            case 1:
            push();
            break;
            case 2:
            pop();
            break;
            case 3:
            display();
            break;
            case 4:
            printf("EXIT");
            exit++;
            break;
            default:
            printf("INVALID CHOICE");
            break;
        }
        if(exit==1)
        {
            break;
        }
    }
    return 0;
}