设计一个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。-Design a C- language parser. Read into a C language program to determine that the procedure was not a legitimate C- language program. If the program has a syntax and semantic errors, please give an error message.