1:  /*

2:  Author:Justinzhang

3:  email:uestczhangchao@gmail.com

4:  time:2012-8-30 22:17:23

5:  desc：fork problem, from www.qshpan.com

6:  */

7:   

8:  #include 
     

9:  #include 
     

10:  int sum;

11:  int main()

12:  {

13:      int i = 0;

14:      sum = 0;

15:      fork();

16:      for(i=0; i<5; i++)

17:      {

18:          printf("%d\n",i);

19:          fflush(stdout);

20:          sum += i;

21:      }

22:      printf("sum = %d\n", sum);

23:

24:      exit(0);

25:  }