对前一个Linux多线程编程实例的修改

#include <pthread.h>
#include <stdio.h>
#include <sys/time.h>
#include <string.h>
#include <unistd.h>
#define MAX 10
pthread_t thread[2];
pthread_mutex_t mut;
int number=0, i;
void *thread1(void *)
{
        printf ("thread1 : I'm thread 1\n");
        for (i = 0; i < MAX; i++)
        {
        	sleep(2);
                printf("thread1 : number = %d\n",number);
                pthread_mutex_lock(&mut);
                        number++;
                pthread_mutex_unlock(&mut);

        }
        printf("thread1 :the main function is waiting for me?\n");
        pthread_exit(NULL);
}
void *thread2(void *)
{
        printf("thread2 : I'm thread 2\n");
        for (i = 0; i < MAX; i++)
        {
        	sleep(3);
                printf("thread2 : number = %d\n",number);
                pthread_mutex_lock(&mut);
                        number++;
                pthread_mutex_unlock(&mut);
        }
        printf("thread2 :the main function is waiting for me? \n");
        pthread_exit(NULL);
}
void thread_create(void)
{
        int temp;
        memset(&thread, 0, sizeof(thread));          //comment1
        /*创建线程*/
        if((temp = pthread_create(&thread[0], NULL, thread1, NULL)) != 0)       //comment2
                printf("Thread 1 fail to create!\n");
        else
                printf("Thread 1 created!\n");
        if((temp = pthread_create(&thread[1], NULL, thread2, NULL)) != 0)  //comment3
                printf("Thread 2 fail to create!");
        else
                printf("Thread 2 created!\n");
}
void thread_wait(void)
{
        /*等待线程结束*/
        if(thread[0] !=0) {                   //comment4
                pthread_join(thread[0],NULL);
                printf("Thread 1 completed\n");
        }
        if(thread[1] !=0) {                //comment5
                pthread_join(thread[1],NULL);
                printf("Thread 2 completed.\n");
        }
}
int main()
{
        /*用默认属性初始化互斥锁*/
        pthread_mutex_init(&mut,NULL);
        printf("Main function,creating thread...\n");
        thread_create();
        printf("Main function,waiting for thread end....\n");
        thread_wait();
        return 0;
}

 运行结果：