This is what I used VC++. NET prepared 12 months a year used to determine the number of days per month procedures.

Packet : 3970959days.rar filelist
案例4－确定一个月的天数\Days.aps
案例4－确定一个月的天数\Days.cpp
案例4－确定一个月的天数\Days.exe
案例4－确定一个月的天数\Days.h
案例4－确定一个月的天数\Days.ncb
案例4－确定一个月的天数\Days.rc
案例4－确定一个月的天数\Days.sln
案例4－确定一个月的天数\Days.suo
案例4－确定一个月的天数\Days.vcproj
案例4－确定一个月的天数\DaysDlg.cpp
案例4－确定一个月的天数\DaysDlg.h
案例4－确定一个月的天数\ReadMe.txt
案例4－确定一个月的天数\res\Days.ico
案例4－确定一个月的天数\res\Days.manifest
案例4－确定一个月的天数\res\Days.rc2
案例4－确定一个月的天数\resource.h
案例4－确定一个月的天数\stdafx.cpp
案例4－确定一个月的天数\stdafx.h
案例4－确定一个月的天数\res
案例4－确定一个月的天数

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