线程函数参数如何void* p接受(void*)&str)？

线程函数参数怎么void* p接受(void**)&str)？？？

C/C++ code

#include <stdio.h>#include <pthread.h>#include <stdlib.h>/*返回字符串常量的地址*/void* task1(void* p){    char* str = "Hello World";    return str;}int main(){    pthread_t tid;    pthread_create(&tid, 0, task1, 0);    char* str;    pthread_join(tid, (void**)&str);    printf("str=%s\n", str); //return的str保存在str里？？？}