linux小实验（1）－－－线程

（1）、线程会随创建它的进程死掉而死掉

#include  
#include  
#include  
#include 

void *thread(void *);

int main() 
{ 
    pthread_t t_a; 
    pthread_t t_b; 

    pthread_create(&t_a,NULL,thread,(void *)1);
    pthread_create(&t_b,NULL,thread,(void *)2);
    printf("main process is teminated!\n");
    exit(0); 
} 

void *thread(void *junk)
{ 
    int i=1;

    for(i=1;i<=4;i++)
    { 
        printf("thread %d ...\n",(int)junk);
        sleep(1);
   }
   pthread_exit(0);
}

（2）、线程不会随创建它的线程死掉而死掉

#include  
#include  
#include  
#include 

void *thread_parent(void *);
void *thread_child(void *);

int main() 
{ 
    pthread_t t;
    void* ret;

    pthread_create(&t,NULL,thread_parent,(void *)0);

    pthread_join(t,&ret);
    printf("parent thread process is terminated.\n");

    sleep(10);

    printf("main process is teminated!\n");
    exit(0);

}

void *thread_parent(void *para)
{
    pthread_t t1,t2;

    pthread_create(&t1,NULL,thread_child,(void *)1);
    pthread_create(&t2,NULL,thread_child,(void *)2);
    pthread_exit(0);
}

void *thread_child(void *para)
{ 
    int i=1;
    for(i=1;i<=4;i++)
    { 
        printf("child thread %d...\n",(int)para);
        sleep(1);
    }
    printf("child thread %d t is terminated!\n",(int)para);
    pthread_exit(0);
}