this procedure is in a Linux environment FC5 write classical encryption to encrypt playfair procedures. Also in other operating environments. Only text interface

Packet : 111186719playfair_encrypt.rar filelist
playfair_encrypt\playfair\playfair.plg
playfair_encrypt\playfair\playfair.dsp
playfair_encrypt\playfair\playfair.ncb
playfair_encrypt\playfair\playfair.cpp
playfair_encrypt\playfair\playfair.opt
playfair_encrypt\playfair\playfair.dsw
playfair_encrypt\DES\des.cpp
playfair_encrypt\DES\des.h
playfair_encrypt\DES\des.dll
playfair_encrypt\DES\DES_CALL.exe
playfair_encrypt\DES\密文.txt
playfair_encrypt\DES\DES_CALL.cpp
playfair_encrypt\playfair\Debug
playfair_encrypt\playfair
playfair_encrypt\DES
playfair_encrypt

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