butterworth  in C\1.cpp
.................\1.dsp
.................\1.dsw
.................\1.ncb
.................\1.opt
.................\1.plg
.................\1.sln
.................\1.suo
.................\1.vcproj
.................\1.vcproj.SuWei-PC.SuWei.user
.................\Debug\1.exe.embed.manifest
.................\.....\BuildLog.htm
.................\.....\vc90.idb
.................\.....\vc90.pdb
.................\Release\BuildLog.htm
.................\.......\vc90.idb
.................\Debug
.................\Release
butterworth  in C