test-JZTXT

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

int main(void) {
    pid_t pid = fork();
    if (pid < 0) {
        // 创建子进程失败
        fprintf(stderr, "Failed to create child process.\n");
        exit(EXIT_FAILURE);
    } else if (pid == 0) {
        // 子进程
        printf("This is the child process.\n");
        exit(EXIT_SUCCESS);
    } else {
        // 父进程
        printf("This is the parent process. Child process ID is %d.\n", pid);
    }
    return 0;
}