说明：  由计算机“想”一个四位数，请人猜这个四位数是多少。人 输入四位数字后，计算机首先判断这四位数字中有几位是猜对了 ，并且在对的数字中又有几位位置也是对的，将结果显示出来， 给人以提示，请人再猜，直到人猜出计算机所想的四位数是多少 为止。
(by computer "to" a four-digit, four-digit people to guess how much. Importing four figures, the computer first judge four figures Several guess is right, and the right of several figures have the right location, the results are displayed, as well as to suggest that asked people guessing until the people to guess what the computer is the number of the four-digit date.)