algorithm idea of ​ ​ the experiment, use VC++ written in normal operation!

3_idea\idea\de.enc
......\....\Debug\idea.bsc
......\....\.....\idea.exe
......\....\.....\idea.ilk
......\....\.....\IDEA.obj
......\....\.....\idea.pch
......\....\.....\idea.pdb
......\....\.....\IDEA.sbr
......\....\.....\idea_cmd.obj
......\....\.....\idea_cmd.sbr
......\....\.....\test.obj
......\....\.....\test.sbr
......\....\.....\vc60.idb
......\....\.....\vc60.pdb
......\....\idea.c
......\....\idea.def
......\....\idea.dsp
......\....\idea.dsw
......\....\idea.ncb
......\....\idea.opt
......\....\idea.plg
......\....\in.ext
......\....\out.enc
......\....\test.cpp
......\....\Debug
......\idea
3_idea

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