sem 2 stack lab 2

#include<stdio.h>
int main()
{
    int stack[5],n,element,top=-1;
    x:
    printf("enter a number within 1 to 4\n");
    scanf("%d",&n);
    while(n!=4)
    {
        if(n==1)
        {
            top++;
            printf("enter ur element\n");
            scanf("%d",&element);
            stack[top]=element;
            if(top>=5)
            {
                printf("NO SPACE TO PUSH");
            }
            goto x;
        }
        else if(n==2)
        {
            printf("%d\n",stack[top]);
            top--;
            if(top<0)
            {
                printf("nothing to pop\n");
            }
            goto x;
        }
        else if(n==3)
        {
            printf("%d\n",stack[top]);
            if(top<0)
            {
                printf("nothing on top\n");
            }
            goto x;
        }
    }
}