PLx语言的编译器。PLx语言是一种类Pascal语言，但语法比较简单，适用于编译原理教学。这个编译器不仅实现了编译，同时也集成了运行目标代码的虚拟机。当程序编译通过后，可以看到生成的汇编指令及其执行情况，用户可以选择单步执行，并同时观察指令流与数据流。源代码比较简洁且含有注释-PLx language compiler. PLx language is a language like Pascal, but relatively simple syntax, the principle applies to compile teaching. The compiler is not only achieved a compiler, as well as integration of the operational objectives of the virtual machine code. When the compiler is passed, we can see the generation and compilation of the implementation of the Directive, users can choose single-step, and while observing instruction stream and data stream. The source code contains more concise and Notes