说明：  设计目的 1. 程序的方法实现语法分析的LL（1）方法。手工构造词法分析程序 。 2. 锻炼自己的编写程序的能力和独立的编程思维能力。提高自己的编程能力。 3. 熟悉编译原理词法分析和语法分析的方法，加深对基本方法的了解。 4. 让我们更家进一步的理解编译原理，更好的的学习它的一些思路，掌握编译原理的理论基础。 5．让我们更加熟悉编程语言的运用和编程的技巧。更加了解编程的思维方式。 6. 采用自动机这种方法来设计词法分析程序，使思路更加清晰，不会产生思维混乱错误。
(designed one. Procedures method syntax analysis LL (1) method. Manual tectonic lexical analysis procedure. 2. Tempering their preparation and the ability to independent programming and thinking abilities. Improve their programming capability. 3. Familiar with the compiler theory lexical analysis and syntax analysis method to deepen the understanding of the basic method. 4. Let us further understand home compiler theory, the better the learning some of its ideas, master compiler principles theoretical basis. 5. Let us become more familiar with the use of programming languages and programming skills. A better understanding of programming way of thinking. 6. The use of automatic machines to design this method lexical analysis procedures so that more clear thinking, thinking no confusion wrong)