WHY

回复 4# smss

@echo off
set "s=12345.6789"
echo;%s%|sed -n -r "/^([1-9][0-9]{0,51}|0)(\.[0-9]{0,12})?$/p"|findstr .&&echo;Y||echo;N
pause
复制代码

WHY

set "s=9999999999999999999999999999999999999999999999999999.999999999999"
PowerShell "'%s%' -match '^(?:[1-9]\d{0,51}|0)(\.\d{0,12})?$'"
复制代码

WHY

回复 7# smss


    findstr 这么容易搞定，还要 sed 做什么？
批处理脚本而已，先谈“够用”，别动不动就谈通用

WHY

@echo off
set "s=9999999999999999999999999999999999999999999999999999.999999999999"

for /f "tokens=1,2delims=." %%i in ('echo;%s%^|findstr /b /e "[1-9][0-9]* 0 [1-9][0-9]*\.[0-9]* 0\.[0-9]*"') do (
    set "a=%%i"
    set "b=%%j"
)

if defined a (
    if defined b (
        if "%b:~12%" NEQ "" (
            echo;N
        ) else if "%a:~52%" NEQ "" (
            echo;N
        ) else (echo;Y)
    ) else if "%a:~52%" NEQ "" (
        echo;N
    ) else (echo;Y)
) else (echo;N)
pause
复制代码