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二叉树类的前序，后序，层次遍历，其以链表方式存储(Binary tree class pre-order, post-order, hierarchy traversal, the linked list storage)

约瑟夫环（约瑟夫问题）是一个数学的应用问题：已知n个人（以编号1，2，3...n分别表示）围坐在一张圆桌周围。从编号为k的人开始报数，数到m的那个人出列；他的下一个人又从1开始报数，数到m的那个人又出列；依此规律重复下去，直到圆桌周围的人全部出列。通常解决这类问题时我们把编号从0~n-1，最后结果+1即为原问题的解。 (Josephus (Josephus problem) is the application of a mathematical problem: Given n individuals (with numbers 1,2,3 ... n respectively) sitting around a round table. From the number of people gettin k, number of the m man out of the line he s the next person and a number of gettin number to m the man was out of the line and so the law is repeated until the round table were all out of the column. We numbered 0 ~ n-1, the final result is the original problem solution+1 usually solve these problems.)

数据结构，利用霍夫曼树实现文本数据的压缩。(Huffman data compression and decompression.)

数据结构简单的课程设计交通换乘算法,里面有零次换乘与一次换乘(Simple structure, curriculum design data traffic transfer algorithm, which have zero time transfer and a transfer)

题意:给你n个数,求出两两组合的最大公约数 类似打素数表的做法 (Meaning of the questions: to give you the number n, find greatest common divisor of a similar combination twenty-two hit the practice table of prime numbers)

说明：  数据结构基本算法实现。包括栈、二叉树基本运算实现，同时包含整数计算器的完整实现。(The basic algorithm data structure. Including implementation of stack, binary tree basic operations, and a complete implementation of an integer calculator.)

这是一个实现找出欧拉路径的的算法，比较完美的解决了欧拉算法(This is an implementation of the algorithm to find Euler path, the more perfect solution to the Euler algorithm)

说明：  数据结构：Huffman编码。哈夫曼编码是哈夫曼树的一个应用。哈夫曼编码应用广泛，如JPEG中就应用了哈夫曼编码。 哈夫曼树又称最优二叉树，是一种带权路径长度最短的二叉树。(Data structure: Huffman coding. Huffman coding is an application of the Huffman tree. Huffman coding is widely used, such as JPEG in the application of the Huffman coding. Huffman tree, also known as the best binary tree is a weighted shortest path length binary tree.)

数字根算法，用最简单的代码计算数字根。如果把一个大数的各位数字相加得到一个和，再把这个和的各位数字相加又得一个和，再继续作数字和，直到最后的数字和是个位数为止，这最后的数称为最初那个数的“数字根”。(Digital root algorithm, with the most simple code to calculate the digital root. If you figure in a large numbers is the sum of a, then this and you figure the sum is again a, and then continue for digital and until the final figure and the single digits, the last number called initially that the number of "digital root".)

简单LR语法分析程序自动生成器的实现，可用作数据结构课程设计(LR (0) grammar analysis)