计算器，能实现计算器的基本的加减乘除等功能，方便简易，-Calculator, calculator to achieve the basic functions of addition, subtraction, etc., to facilitate easy

用c语言编程的简易计算器，实现了基本的运算，以下是各个模块的程序-C language programming with a simple calculator to realize the basic operations, the following are the procedures for each module