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1. #include <sys/types.h>
2. #include <unistd.h>
3. #include <stdlib.h>
4. #include <stdio.h>
5. int main(void)
6. {
7. pid_t reuslt ;
8. result = fork();
9. if(result == -1)
10. {
11. perror("fork");
12. exit;
13. }
14. else if(result==0)
15. {
16. printf("The return value is %d\nIn child process!\nMy PID is %d\n",result,getpid());
17. }
18. else
19. {
20. printf("The return value is %d\nIn father process!\nMy PID is %d\n",result ,getpid());
21. }
22. }