计算5位数的数位\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
...............\Debug
计算5位数的数位