这是一个制导翻译的源代码，因为跟我们作业无关，我也不知道具体是什么，但可能有人有用吧，这东西我反正很少听说，也许很难找吧-This a guided translation of source code, because the operation has nothing to do with us, I do not know the specifics of what It might be useful to it, something I rarely heard anyway, it

这是一个用C++实现的语法制导翻译程序，当输入一个表达式时可以将其转化为相应的四元式-This is a realization of the C syntax translation guided procedure, when an input expression can be translated into the corresponding four yuan -

VC PL0编译器PL/0编译器是个一遍的编译程序，词法分析程序作为子程序，需要的时候被语法分析程序调用，使用语法制导的翻译技术，在语法分析的同时生成中间代码，并保存到文件中。-VC PL0 compiler PL/0 compiler is again compiled program, lexical analysis program as a subroutine, and when required by the syntax analysis program call, use the