File list (Check if you may need any files):
BUZZER\B1\B1.dep
......\..\B1.ewd
......\..\B1.ewp
......\..\B1.eww
......\..\Debug\Exe\B1.a43
......\..\.....\...\B1.d43
......\..\.....\...\B1.txt
......\..\.....\Obj\B1.pbd
......\..\.....\...\main.r43
......\..\main.c
......\..\settings\B1.cspy.bat
......\..\........\B1.dbgdt
......\..\........\B1.dni
......\..\........\B1.wsdt
......\.2\B2.dep
......\..\B2.ewd
......\..\B2.ewp
......\..\B2.eww
......\..\Debug\Exe\B2.d43
......\..\.....\...\B2.txt
......\..\.....\Obj\B2.pbd
......\..\.....\...\main.r43
......\..\main.c
......\..\music.h
......\..\settings\B2.cspy.bat
......\..\........\B2.dbgdt
......\..\........\B2.dni
......\..\........\B2.wsdt
......\蜂鸣器实验.pdf
......\B1\Debug\Exe
......\..\.....\List
......\..\.....\Obj
......\.2\Debug\Exe
......\..\.....\List
......\..\.....\Obj
......\.1\Debug
......\..\settings
......\.2\Debug
......\..\settings
......\B1
......\B2
BUZZER