说明： 本程序主要用于实现自底向上分析技术中的简单优先分析算法，简单文法可由键盘输入，实现功能包括：简单优先文法的判别，优先关系矩阵的输出，句子的识别等 (the procedures used to achieve a bottom-up analysis of a simple priority analysis algorithms, simple grammar could be the keyboard input to achieve features include : simple grammar discriminant priority, the priority matrix output, sentence recognition)
