Semester

Question

1. Consider the following program.
#include <stdio.h>
#include <stdlib.h>

typedef struct {
    int x;
} global_t;

global_t *g;

int main(void) {
    g = (global_t*)malloc(sizeof(global_t));
    g->x = 5;

    if (fork() == 0) {
        if (fork() == 0) {
            g->x--;
            printf("%d", g->x);
        } else {
            g->x++;
        }
        wait(NULL);
        g->x++;
        printf("%d", g->x);
    } else {
        g->x = 2 * g->x;
        wait(NULL);
        g->x++;
        printf("%d", g->x);
    }

    printf("%d", g->x);
    return 0;
}
What are the possible outputs of this program?