该源代码可以实现一个简易计算器！如可以实现就最基本的加减乘除的功能外，还能实现二进制，平方，开方，取余，阶乘等功能！是人们日常生活中必不可少的实用的办公软件！-The source code can achieve a simple calculator! As can be achieved on the basic arithmetic functions, but also to achieve binary, square, square root, take I, the factorial function! Is essential for people' s daily life and practical office software!