多线程

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

struct member
{
   int a;
   char* s;
};
/*线程1，不传递参数 */
void* create1(void* arg)
{
    printf("thread create1 \n");
    return (void*)0;
}
/*线程2，传递一个int型参数*/
void* create2(void* arg)
{
    int* name;
    name=(int*)arg;
    printf("thread create2 %d\n",*name);
    return 0;
}
/*线程3，传递一个string型参数*/
void* create3(void* arg)
{
    char* str;
    str=(char*)arg;
    printf("thread create3 %s \n",str);
    return 0;
}

/*线程4，传递一个struct结构体*/
void* create4(void* arg)
{
    struct member *sm;
    sm=(struct member *)arg;
    printf("thread create4 a=%d,s=%s \n",sm->a,sm->s);
    return 0;
}

int main(int argc, char** argv)
{
    pthread_t pid1,pid2,pid3,pid4;
    int ret;
    int test=8;
    int* name=&test;

    char* a="hello world!";

    struct member *sm;
    sm=(struct member *)malloc(sizeof(struct member));
    sm->a=4;
    sm->s="struct test!";

    ret=pthread_create(&pid1,NULL,create1,NULL);

    pthread_join(pid1,NULL);
    if(!ret)
        printf("pthread_creat1 ok\n");

    ret=pthread_create(&pid2,NULL,create2,(void*)name);
    pthread_join(pid2,NULL);
    if(!ret)
        printf("pthread_creat2 ok\n");

    ret=pthread_create(&pid3,NULL,create3,(void*)a);
    pthread_join(pid3,NULL);
    if(!ret)
        printf("pthread_creat3 ok\n");

    ret=pthread_create(&pid4,NULL,create4,(void*)sm);
    pthread_join(pid4,NULL);
    if(!ret)
        printf("pthread_creat4 ok\n");
    return 0;
}