picottcn是ETSI的TTCN-3协议测试语言的开源编译器，需要与执行器一并编译。对于大型语言编译器的开发设计是一个参考-picottcn is the ETSI TTCN-3 protocol test of open source language compiler needs to be compiled with the actuator. Language compiler for the development of large-scale design is a refere

本人编写的一个采用递归下降法实现了PL0语言的编译器，程序分三部分：词法分析、语法分析、模拟执行器。运用有限状态自动机的方式实现，比传统的if-else方式更加简洁清晰。-Achieved by recursive descent PL0 language compiler, the program divided into three parts: lexical analysis, syntax analysis, simulation of the actuator. Finite sta