分数变小数\2.cpp
..........\2.dsp
..........\2.dsw
..........\2.ncb
..........\2.opt
..........\2.plg
..........\Debug\2.exe
..........\.....\2.obj
..........\.....\2.pdb
..........\.....\vc60.pdb
..........\Debug
分数变小数