应用于模式分类中，用模式匹配方法对数据进行分类来获得对手写汉字识别的功能-Applied to pattern classification, the use of pattern-matching methods to classify the data to obtain the function of Handwritten Chinese Character Recognition

全排列，详细讲解全排列，同时还手写实现了一个-Permutation, explain in detail the whole arrangement, and also implements a handwritten