实现一个C语言子集的词法分析程序。自己任意书写一小段包含上述部分关键字的C语言代码，编写词法分析程序分析所写的代码，可以用任何语言实现，输出程序中所有关键字、整数、自定义标识符对应的二元式。-Achieve a C language subset of the lexical analyzer. Own any writing short contains some of these keywords C language code, written analysis of lexical an

词法分析程序，次程序实现了if else语句的标准输入-Lexical analysis program, sub-program if else statement of the standard input

这里以开始定义的PASCAL语言子集的源程序作为词法分析程序的输入数据(Here to start defining the PASCAL language subset of the source program as input data to the lexical analysis program)