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

int main(void)
{
    int i = 0;
    pid_t pid;
    pid = fork();
    if  (pid < 0)
    {
        printf("fork is error \n");
        return -1;
    }
    // 父进程
    if (pid > 0){
        printf("this is parent, parent pid is %d\n",getppid());
    }
    // 子进程
    if (pid == 0){
        printf("this is dhild, child pid is %d\n",getpid());
        
    }
    return 0;
}