【C】——如何用线程进行参数的传递

　　直接上代码：

 1 #include<pthread.h>

 2 #include<stdio.h>

 3 

 4 struct val{

 5     int num1;

 6     int num2;

 7 };

 8 

 9 //send a int to arg

10 void *text(void *arg)

11 {

12     int *p = (int *)arg;

13     printf("arg is %d\n",*p);

14     pthread_exit(NULL);

15 }

16 

17 //send char to arg

18 void *text2(void *arg)

19 {

20     char *d = (char *)arg;

21     printf("arg is %s\n",arg);

22     pthread_exit(NULL);

23 }

24 

25 //send a struct to arg

26 void *text3(void *arg)

27 {

28     struct val *v = (struct val *)arg;

29     printf("arg is v.num1:%d,v.num2:%d\n",v->num1,v->num2);

30     pthread_exit(NULL);

31 }

32 

33 int main()

34 {

35     pthread_t pth;

36     char val[10] = "i am arg.";

37     int arry = 10;

38     pthread_create(&pth, NULL, text,(void *)&arry);

39     pthread_join(pth, NULL);

40     

41     pthread_create(&pth, NULL, text2, (void *)val);

42     pthread_join(pth, NULL);    

43 

44     struct val v;

45     v.num1 = 0;

46     v.num2 = 1;

47     pthread_create(&pth, NULL, text3, (void *)&v); //一定要用&v因为结构体是值类型；

48     pthread_join(pth, NULL);

49 

50     return 0;

51 }

结果如下：

　　每次传递的时候，都需要转化成void，接收之后，再由void转换成自己需要的类型！