产品详情
说明： 实现两个数的加减乘处运算，用两个文本框接收输入，加减乘除为按钮，用标签显示
(Addition and subtraction of two numbers to multiply at the operation, with two text boxes to receive input, addition, subtraction button labels show)
(Addition and subtraction of two numbers to multiply at the operation, with two text boxes to receive input, addition, subtraction button labels show)
文件列表：
5-1.txt,1992,2012-05-12
