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

int  push(int *,int , int *);
int  pop(int *, int *, int *);

int main()
{
    int a[MAX],head = -1, ele;
    push(a,8,&head);
    push(a,7,&head);
    push(a,12,&head);
    pop(a,&ele,&head);
    printf("ele = %d  ",ele);
    pop(a,&ele,&head);
    printf("ele = %d  ",ele);
    pop(a,&ele,&head);
    printf("ele = %d  ",ele);
    return 0;
}

int push(int *p, int ele, int *h){
if(*h == MAX){
    printf("Pila piena");
    return -1;
    }else{
     *(h)+=1;
     *(p + *h) = ele;
     return 0;
    }
}

int pop(int *p, int *ele, int *h){
if((*h) < 0)
{
    printf("Pila vuota");
    return -1;
    }else{
        *ele = *(p + *h);
        *(h)-=1;
        return 0;
      }