此程序使用算符优先法的语义分析方法实现了将赋值语句翻译为四元式的功能这种仅将{=,+,-,*,/}当做运算符，而将括号当做深度的变种算符优先法，很好控制，很容易就能翻译赋值语句。-This program uses operator precedence to achieve a semantic analysis to translate the quaternary assignment functions of this type only the {=,+,-,*,/} as opera

该程序是用来实现语法分析，算法采用算符优先算法，优先表从文件中读取-The program is used to achieve syntax analysis, algorithm uses operator precedence algorithm, the priority table to read from a file

算符优先，赋值语句的分析，输出格式为四元式。在linux环境下实现-Operator precedence, assignment analysis, the output format for the quaternary type. Achieved in the linux environment