编译原理课程设计，词法分析，语法分析，语义分析等。-Compilation principle course design, lexical analysis, syntactic analysis, semantic analysis, etc.

用于英文语句的词法成分分析和语义相关性分析，只适合英文句法。-And semantic correlation analysis, only suitable for English syntactic lexical analysis of ingredients used in English sentences.

设计并实现一个简单的编译器。该编译器能够从文件读取程序代码，通过词法分析、语法分析、语义分析等步骤输出四元式-Design and implement a simple compiler.The compiler can read from the file program code, through lexical analysis, syntactic analysis, semantic analysis steps such as the output type four yuan