GodInHell

@echo off
Setlocal Enabledelayedexpansion
set /a most=1,max=1
for /f "delims=" %%a in (a.txt) do (
  for %%i in (%%a) do (
    set /a _%%i+=1
    if !_%%i! gtr !most! (set most=!_%%i!&set num=%%i)
    if %%i gtr !max! set max=%%i
  )
)
echo.出现最多的是:!num!   出现次数为:!most!   最大数是:!max!&pause
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