一个用C++写成的，修改文件扩展名的程序。可以参考其中大量的自定义字符串处理函数。而且也用到了一部分编译原理的内容。我的作品-one written in C, modify file extensions procedures. Can refer to the large-defined string handling functions. It also uses part of the contents of compiler theory. My work

测试对字符串的加密和解密；有注释有内容；新手初始；有大神；请指教；谢谢评价啊；这是一个小白的真心话(#define ENCRYPTION_H_INCLUDED#include "encryption.h")