c++多线程参数的传递

#include <iostream>
#include <pthread.h> //多线程相关操作头文件，可移植众多平台
using namespace std;struct mypara
{
int para1; //参数1
char *para2; //参数2
pthread_t wait;
};void* thread1( void* args ) //本函数演示的是数据的传出
{
mypara *my = (mypara *)args;
srand(unsigned(time()));
my->para1 = rand()%;
my->para2 = "。";
cout << "给结构体赋值结束"<< endl;
return ;
}
void* thread2( void* args ) //本函数演示的是数据的传入
{
mypara *str_in = (mypara *)args;
cout << "线程2开始运行........................" <<endl;
pthread_join(str_in->wait,NULL); //需要等待thread1线程给struct 结构体赋值结束后才能运行
cout << "线程1产生的随机数是：" << str_in->para1<< " "<< str_in->para2 <<endl;
return ;
}
int main()
{
pthread_t tid1,tid2;
mypara my_para; int ret = pthread_create( &tid1, NULL, thread1, (void *)&my_para );
//pthread_join(tid1,NULL);
my_para.wait = tid1;
pthread_create( &tid2, NULL, thread2, (void *)&my_para );
system("pause");
pthread_exit( NULL );
}