WHY

@echo off
setlocal enabledelayedexpansion
for /f %%i in ('sort 1.txt') do (
    if "%%i" == "!s!" (set /a n+=1) else (set n=101)
    echo;%%i!n:~-2!
    set "s=%%i"
)
pause
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如果不希望打乱顺序，可以这样，兼容性稍差

@echo off
setlocal enabledelayedexpansion
for /f %%i in (a.txt) do (
    if defined _%%i (set /a _%%i+=1) else (set _%%i=101)
    echo;%%i!_%%i:~-2!
)
pause
复制代码