#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 ;

 }