中国DOS联盟

@echo off
setlocal enabledelayedexpansion
for /f "tokens=1-2 delims= " %%a in (a.txt) do (
  if not defined var_%%b (
    set var_%%b=%%a
  ) else (
    set var_%%b=!var_%%b! %%a
  )
)
for /f "tokens=2-3 delims=_=" %%a in ('set var_') do (
  echo.%%a: %%b
)
pause

@echo off
setlocal EnableDelayedExpansion
for /f "tokens=1,2" %%a in (a.txt) do (
  set sig_%%b=!sig_%%b!%%a 
)
for /f "delims=_= tokens=2,3" %%a in ('set sig_') do (
  echo %%a: %%b
)
pause