一个android上的计算器，独有独立计算和表达式计算的功能，而且还能记录日志-Calculator on a android unique independent calculation and expression calculation function, but also logging

基于MFC的科学计算器，基本实现XP自带科学计算器的功能，另外增加了一次性计算表达式的能力。-a science calculator based on MFC, which has realized the basic functions in calculator in win-XP. what s more, it adds a new function that allowed