说明: 一个程序,用于判定给定的文法是否为LL(1)文法。 实现了:1.文法的机内表示;2. FIRST集和FOLLOW集的计算; 3. LL(1)预测分析表的构造。 (a procedure for the determination of grammar to whether LL (1) grammar. Realized : 1. Grammar said the machines; 2. FIRST FOLLOW sets and set computing; 3. LL (1) Forecast and Analysis table structure.)