程序接受用户键入的一行字符（字符数不超过80个，该字符串用回车符结束），并按字母、

数字以及其他字符分类统计，然后将结果存入以letter,digit和other为名的存储单元。

-Procedures acceptable to the user typed his character (the number of characters is not more than 80, the end of the string with carriage return), and letters, numbers and other characters keep statistics of the results and then deposited by letter, digit and the other under the pretext of memory cell.