在Linux下循环创建N个子进程的具体实现方法

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

int main() {
    pid_t pid = fork();
    if (pid == -1) {
        perror("fork error");
        return 1;
    } else if (pid == 0) {
        printf("I am the child process, PID: %d\n", getpid());
    } else {
        printf("I am the parent process, PID: %d, Child PID: %d\n", getpid(), pid);
    }
    return 0;
}

I am the parent process, PID: 1234, Child PID: 1235
I am the child process, PID: 1235

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

int main() {
    int i;
    pid_t pid;
    for (i = 0; i < 5; i++) {
        pid = fork();
        if (pid == -1) {
            perror("fork error");
            return 1;
        } else if (pid == 0) {
            printf("Child %d: PID = %d, PPID = %d\n", i + 1, getpid(), getppid());
            break;  // 子进程退出循环
        } else {
            sleep(1);  // 父进程等待子进程完成
            printf("Parent: PID = %d, Child %d completed\n", getpid(), i + 1);
        }
    }
    return 0;
}

Parent: PID = 1234, Child 1 completed
Child 1: PID = 1235, PPID = 1234
Parent: PID = 1234, Child 2 completed
Child 2: PID = 1236, PPID = 1234
...
Child 5: PID = 1238, PPID = 1234

#include <sys/wait.h>

// 在父进程中添加以下代码
int status;
waitpid(pid, &status, 0);  // 等待子进程完成