多线程并行与退出

例1：进程与线程并行输出

#include <stdio.h>

#include <string.h>

#include <errno.h>

#include <pthread.h>

void *thread_routine(void *arg)

{

printf("I am a thread, my thread id is : %dn", pthread_self());

int i;

for ( i = 0; i < 5; i++)

{

printf("thread i = %dn", i);

fflush(stdout);

sleep(1);

}

printf("I am a thread, I will exitn");

}

int main()

{

pthread_t tid;

int ret = 0;

ret = pthread_create(&tid, NULL, thread_routine, NULL);

if (ret != 0)

{

printf("pthread_create errorn");

exit(0);

}

int i;

for ( i = 0; i < 5; i++)

{

printf("main i = %dn", i);

fflush(stdout);

sleep(1);

}

sleep(2);