1、给出各单词符号的类别编码。

2、词法分析程序应能发现输入串中的错误。

3、词法分析作为单独一遍编写，词法分析结果为二元式序列组成的中间文件。

4、设计两个测试用例（尽可能完备），并给出测试结果。-A given class of coding each word symbols. 2, lexical analysis program should be able to find errors in the input string. 3, again written as a separate lexical analysis, lexical analysis results for the intermediate file consisting of binary sequence. 4, the design of the two test (as complete as possible), and the test results are given.