qfedu-linux-advanced-level/day2/homework/h3.c

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// 编写一个程序创建一个子进程并在子进程中打印出自己的进程IDPID在父进程中打印出子进程的PID。
#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>
int main(int argc, char const *argv[])
{
pid_t pid = fork();
if (pid < 0)
{
printf("fork error\n");
return -1;
}
if (pid == 0)
{
printf("子进程打印子进程ID: %d\n", getpid());
}
else
{
printf("父进程打印子进程ID: %d\n", pid);
}
return 0;
}