taofan712

@echo off&setlocal enabledelayedexpansion
set str=bBAathToHOMmEe
set str_bp=%str%
for %%a in (A B C D E F G H I J K L M N O P Q R S T U V W X Y Z) do call set str_bp=%%str_bp:%%a=%%a%%
for /l %%a in (0 1 14) do (
	for /f "tokens=1,2 delims=#" %%b in ('call echo;%%str:~%%a^,1%%#%%str_bp:~%%a^,1%%') do (
		if not "%%b"=="%%c" (set lc=!lc!%%b) else ( set uc=!uc!%%c)
))
echo;!lc!!uc!
pause
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请各位帮忙看下我的代码为什么这么慢，我原以为是用了call set和call echo，改成下面的，还是一样的慢。将近2秒。

@echo off&setlocal enabledelayedexpansion
set str=bBAathToHOMmEe
set str_bp=%str%
for %%a in (A B C D E F G H I J K L M N O P Q R S T U V W X Y Z) do set str_bp=!str_bp:%%a=%%a!
for /l %%a in (0 1 14) do (
	for /f "tokens=1,2 delims=#" %%b in ('echo;!str:~%%a^,1!#!str_bp:~%%a^,1!') do (
		if not "%%b"=="%%c" (set lc=!lc!%%b) else ( set uc=!uc!%%c)
))
echo;!lc!!uc!
pause
复制代码

@terse 感谢指点，去掉了中间一个for。

@echo off&setlocal enabledelayedexpansion
set str=bBAathToHOMmEe
set str_bp=%str%
for %%a in (A B C D E F G H I J K L M N O P Q R S T U V W X Y Z) do set str_bp=!str_bp:%%a=%%a!
for /l %%a in (0 1 14) do (
    if not "!str:~%%a,1!"=="!str_bp:~%%a,1!" (set lc=!lc!!str:~%%a,1!) else ( set uc=!uc!!str_bp:~%%a,1!)
)
echo;!lc!!uc!
pause
复制代码

taofan712

回复 13# codegay


    前辈，请帮忙指点下我写的代码（13楼），为什么会耗费将近2秒。该怎么改才对呢

taofan712

回复 16# codegay


    谢谢，因为经常见到你的id...现在才注意到你主要在python区发帖 ^_^