c—语言的句法分析器。读入一个C--语言程序，判断该程序是不是一个合法的C-- 语言程序。如果程序有语法和语义错误，请给出错误信息。-c-language Parser. Reading into a C language program to determine that the procedure was not a legal C-language program. If the program has grammar and semantic error, please give a