win32控制台程序，简易科学型计算器，支持加减乘除四则运算以及多层括号优先级运算，支持对输入的算式进行语法检查，报告错误位置，采用LR1文法进行匹配运算和语法检查。-win32 console program, simple scientific calculator, supports four arithmetic operations, and multi-brackets priority operations, support for input formula syntax che