例子: This game is about guessing a number(0~999).Can you guess it?I think you can't.If you think you can,please try it. 请按任意键继续. . . Round1:please guess a number:500 Too big! Round2:please guess a number:250 Too big! Round3:please guess a number:125 Too small! Round4:please guess a number:187 Too sma