求多项式根
..........\Debug
..........\.....\test.exe
..........\.....\test.ilk
..........\.....\test.obj
..........\.....\test.pch
..........\.....\test.pdb
..........\.....\vc60.idb
..........\.....\vc60.pdb
..........\test.cpp
..........\test.dsp
..........\test.dsw
..........\test.ncb
..........\test.opt
..........\test.plg