K-近似匹配，动态规划法。输入两个文本和编辑距离k，找出k以内的文本匹配情况。代码很短短，没有相当算法功底很难看懂。最好参考经典的算法设计书籍。-K-approximate matching, dynamic programming method. Two input text and edit distance k, find k within the text to match. The code is a short, not quite algorithms foundation is