#include <stdio.h>
#include <unistd.h>

int main(void)
{
    pid_t pid;
    printf("father \n");
    printf("fork \n");
    pid = fork();
    if(!pid)
        printf("child \n");
    else if(pid>0)
        printf("i m the parent ,child pid %d\n",pid);
    else
        printf("fork failed \n");
}