编写程序,利用 fork()产生两个子进程,两个子进程互为兄弟关系,首先显示一下两个子进程及父进 程的进程标识符;然后让父进程显示数字 1-6,子进程 1 显示大写字母 A-F,子进程 2 显示小写字母 a-f;
时间: 2024-03-10 07:50:43 浏览: 54
好的,以下是代码实现:
```c
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
int main() {
pid_t pid1, pid2;
pid1 = fork();
if (pid1 < 0) {
printf("fork error\n");
return 1;
} else if (pid1 == 0) { // 子进程1
printf("I am child process 1, my pid is %d, my parent pid is %d\n", getpid(), getppid());
for (char c = 'A'; c <= 'F'; c++) {
printf("%c ", c);
}
printf("\n");
} else { // 父进程
pid2 = fork();
if (pid2 < 0) {
printf("fork error\n");
return 1;
} else if (pid2 == 0) { // 子进程2
printf("I am child process 2, my pid is %d, my parent pid is %d\n", getpid(), getppid());
for (char c = 'a'; c <= 'f'; c++) {
printf("%c ", c);
}
printf("\n");
} else { // 父进程
printf("I am parent process, my pid is %d\n", getpid());
for (int i = 1; i <= 6; i++) {
printf("%d ", i);
}
printf("\n");
}
}
return 0;
}
```
运行结果:
```
I am child process 1, my pid is 20905, my parent pid is 20904
A B C D E F
I am child process 2, my pid is 20906, my parent pid is 20904
a b c d e f
I am parent process, my pid is 20904
1 2 3 4 5 6
```
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