【C】——如何用线程进行参数的传递

　　直接上代码：

 #include<pthread.h>
 #include<stdio.h>

 struct val{
     int num1;
     int num2;
 };

 //send a int to arg
 void *text(void *arg)
 {
     int *p = (int *)arg;
     printf("arg is %d\n",*p);
     pthread_exit(NULL);
 }

 //send char to arg
 void *text2(void *arg)
 {
     char *d = (char *)arg;
     printf("arg is %s\n",arg);
     pthread_exit(NULL);
 }

 //send a struct to arg
 void *text3(void *arg)
 {
     struct val *v = (struct val *)arg;
     printf("arg is v.num1:%d,v.num2:%d\n",v->num1,v->num2);
     pthread_exit(NULL);
 }

 int main()
 {
     pthread_t pth;
     char val[] = "i am arg.";
     int arry = ;
     pthread_create(&pth, NULL, text,(void *)&arry);
     pthread_join(pth, NULL);

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

     struct val v;
     v.num1 = ;
     v.num2 = ;
     pthread_create(&pth, NULL, text3, (void *)&v); //一定要用&v因为结构体是值类型；
     pthread_join(pth, NULL);

     return ;
 }

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！