字符串比较相似度的一个实例，写的还行吧，希望对大家有所帮助。-An example of a string comparison similarity, write OK, we hope to help.

delphi 计算两个字符串的相似度 , 做验证码识别用来匹配特征库-Delphi calculate the similarity of two strings, do the verification code to identify the signature library