词法分析：将该语言的源程序，也就是相应的字符流转换成内码，并根据需要是否对于标识号填写相应的符号表供编译程序的以后各阶段使用- Lexical Analysis：The language of the source, that is, the character stream into corresponding internal codes, and if necessary, fill in the corresponding identification number for the symbol table for the compiler to use the subsequent stages