一个用VB写的四则计算器源代码. 功能:1、实现简单的四则运算 2、加入了每日一贴的功能，为了练习每日一贴程序的编制方法，其实本程序完全没有必要加入此功能 3、程序的难点在于对每个按键的判断，其实是比较麻烦，但技术含量不高，仔细看都能看懂 -a VB wrote four calculators source code. Features : 1, the simple four Operational 2, joined a daily functions, in order to practice a daily process of the preparation method, the procedure is absolutely not necessary to include this feature 3, the procedure is difficult for everyone by Bond judgment, which is troublesome, but not high technological content, carefully read all understand