qt延时程序

QTime time;    QDateTime datetime;    for(int i=0;i<10;++i)    {        qDebug()<<QDateTime::currentDateTime().toString("hh:mm:ss.zzz");        time.start();        while(time.elapsed()<1000);    }

输出为：

Starting D:\code\untitled3\debug\untitled3.exe..."10:30:10.593" "10:30:11.625" "10:30:12.625" "10:30:13.625" "10:30:14.625" "10:30:15.625" "10:30:16.625" "10:30:17.625" "10:30:18.625" "10:30:19.625" 

很准确。