学步园

用于判断输入的一个字符是否为"&^>中的符号。注意匹配串中的空格不可省略！

@echo off
set Input=S 
set /p Input=Please input a number:
set Filter=S%Input%echo off >nul 2 >nul 
rem replace " with >
set Filter=%Filter:"=>% 
echo %Filter%a
rem & 
if "%Filter%"=="S " echo and 
rem ^
if "%Filter%"=="Secho off  2   " echo fan
rem >
if "%Filter%"=="S off  2   " echo gtr
echo %Filter%