dvigenere.h

简单的vigenere解密及其解密功能实现代码

#ifndef __DVIGENERE_H__
#define __DVIGENERE_H__

extern char *dvigenere_encrypt( char *p, char *k, int l );
extern char *dvigenere_decrypt( char *c, char *k, int l );

extern int getoffset( char c );
extern int blowerletter( char c );
extern int bpowerletter( char c );

#endif