pentru prieten

#include <stdio.h>
#include <stdlib.h>

unsigned short  st[11], varf = 0;

int push(unsigned short a) {
    if (varf == 10) return 1;
    varf++;
    st[varf] = a;
    return 0;
}

int pop() {
    if (varf == 0) return 1;
    unsigned short x = st[varf], nr = 0;
    while (x) {
        nr++;
        x &= x - 1;
    }

    printf("pop %d\n", st[varf]);
    printf("Nr bit 1: %d\n", nr);
    printf("Nr bit 6 = 0: %d\n\n", st[varf] & (~(1 << 6)));
    varf--;
    return 0;
}

int main(){
    unsigned short a, i;
    for (i = 0; i < 7; i++) {
        printf("st[%d]= ", i);
        scanf("%d", &a);
        push(a);
    }
    for (i = 0; i < 7; i++)pop();




    return 0;

}