Null?

回复 63# ghostwar

@echo off
echo.&echo.
set /p str=请输入密码：
if /i "%str%"=="qwer" (echo 密码正确！) else (echo 密码错误!
)
pause>nul
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Null?

另有一行代码求教，

echo off
for %%i in (79) do echo.
pause
:start
if %%i lss 100 (echo pretty good!&pause>nul) else (echo Ah..!&pause>nul)
if %%i lss 0 (echo Pretty good!&pause>nul) else (echo SHIT!&pause>nul)
goto start
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输出结果都是Pretty good，怎么回事？