判断是否为闰年\year.dsp
..............\Debug\vc60.pdb
..............\.....\year.exe
..............\.....\year.pdb
..............\.....\year.obj
..............\year.ncb
..............\year.plg
..............\year.cpp
..............\year.opt
..............\year.dsw
..............\Debug
判断是否为闰年