本程序是用纯C语言编的一个基于命令行的四则运算计算器。主要用于计算四则运算 * 表达式的值，同时可以实现四种进制任意两种之间的转换-This program is to use pure C language compiled a command line based on the arithmetic calculator. Mainly used to calculate the value of the arithmetic expression, and to realize t