Hi,

I am confused about it. I have read that when a child is created by a parent process, child gets a copy of its parent's address space. What it means here by copy? If i use code below, then it prints same addresses of variable 'a' which is on heap in all cases. i.e in case of child and parent. So what is happening here?

#include <sys/types.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
int main ()
{
    pid_t pid;
    int *a = (int *)malloc(4);
    printf ("heap pointer %p\n", a);
    pid = fork();
    if (pid < 0) {
            fprintf (stderr, "Fork Failed");
            exit(-1);
    }
    else if (pid == 0) {
            printf ("Child\n");
            printf ("in child heap pointer %p\n", a);
    }
    else {

            wait (NULL);
            printf ("Child Complete\n");
            printf ("in parent heap pointer %p\n", a);
            exit(0);
    }
}