对于任意输入的一个LL(1)文法，构造预测分析程序，输出输入串的自动匹配过程。首先实现集合FIRST(X)构造算法和集合FOLLOW(A)构造算法，再实现预测分析表构造算法。再构造预测分析程序，输出字符串的自动匹配过程。-For any input of a LL (1) grammar, structure prediction analysis program, import and export series of automatic matching process. First of

四则运算主要是用字符串形式接收一个带括号的四则运算表达式，然后按照四则运算优先级的算法先括号，后乘方，乘除，加减这样的顺序将这个算式解出。-Arithmetic is mainly used to receive a string of four operations with the expression in parentheses, and then follow the four operations in parentheses first priority of the algori

数据结构 树的先序中序后续遍历 递归和非递归算法-Order follow-up in the first sequence of the data structure of the tree traversal recursive and non-recursive algorithm