对一段只含有几种字符的字符串进行转换，转换成相应的数字
......................................................\1.cpp
......................................................\1.dsp
......................................................\1.dsw
......................................................\1.ncb
......................................................\1.opt
......................................................\1.plg
......................................................\Debug
......................................................\.....\1.exe
......................................................\.....\1.ilk
......................................................\.....\1.obj
......................................................\.....\1.pch
......................................................\.....\1.pdb
......................................................\.....\vc60.idb
......................................................\.....\vc60.pdb
......................................................\.....\zifuchuan.pch
......................................................\.....\zifuchuan.pdb
......................................................\zifuchuan.dsp
......................................................\zifuchuan.dsw
......................................................\zifuchuan.ncb
......................................................\zifuchuan.opt
......................................................\zifuchuan.plg