怎的在屏幕中间动态打印本地时间？

怎样在屏幕中间动态打印本地时间？？
要动态！

[解决办法]

C/C++ code

    while(1)    {        time_t now = time(0);        tm *time_tm = localtime(&now);        printf("\r%d-%d-%d %d:%.2d:%.2d",time_tm->tm_year+1900,time_tm->tm_mon+1,time_tm->tm_mday,time_tm->tm_hour,time_tm->tm_min,time_tm->tm_sec);    }
[解决办法]
C/C++ code
 while(1)    {system("cls");        time_t now = time(0);        tm *time_tm = localtime(&now);        printf("\r%d-%d-%d %d:%.2d:%.2d",time_tm->tm_year+1900,time_tm->tm_mon+1,time_tm->tm_mday,time_tm->tm_hour,time_tm->tm_min,time_tm->tm_sec);    }