myzwd

@echo off
set /p str=
echo. %str%
echo *****************************
if %str:~0,1% neq 0 (echo This is not a numeral ---NaN  & echo bye & goto:eof) 
echo orginal str---%str%

:one
if %str:~0,1% equ 0 (set str=%str:~1% ) 
if %str:~0,1% equ 0 goto one


:end
echo string after delete zero---- %str%
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[ 本帖最后由 myzwd 于 2009-2-28 17:31 编辑 ]