线程的创建与使用

#include<pthread.h>#include<stdio.h>void *inc_x(void *x_void_ptr){    int *x_ptr=(int *)x_void_ptr;    while(++(*x_ptr)<100);    printf("x increment finished\n");    sleep(2);    return NULL;}int main(){    int x = 0;    int y = 0;    printf("x:%d,y:%d\n",x,y);    pthread_t inc_x_thread;    if(pthread_create(&inc_x_thread,NULL,inc_x,&x))    {        fprintf(stderr,"Error creating thread\n");        return 1;     }        while(++y<100);    printf("y increment finished\n");    if(pthread_join(inc_x_thread, NULL))    {        fprintf(stderr,"Error joining thread\n");        return 2;    }       printf("x:%d,y:%d\n",x,y);    return 0;}