China DOS Union

@echo off 

if not exist bb.txt

for /f "delims=" %%i in (bb.txt) do set passwords=%%i

:begin

cls&set /p password=  Please enter the password:

if "%password%"=="%passwords%" goto ok

cls&echo   Wrong password&ping /n 2 127.1>nul&goto begin

:set

set select=2

cls&set /p select=  Change the password? (default is not to change if you just press Enter): (1. Change 2. Do not change)

if %select% equ 1 goto change

if %select% equ 2 goto ok

if %select% neq 1 if %select% neq 2 goto wrong

:change

set /a n=%random%%%38,m+=1

call,set pwd=%pwd%%%code:~%n%,1%%

if %m% lss 16 goto change

echo :: %pwd%>>%~nx0

cls&echo   Please keep your new password safe: %pwd%&pause&goto :eof



:wrong

cls&echo   Invalid input, please enter the correct choice!&ping /n 2 127.1>nul&goto set

:ok

cls&echo   Correct password!&pause&goto :eof

This code was written by someone else. My idea is:
if the BB.txt file does not exist, then display a prompt (if it exists, then run the password verification program according to bb.txt)
For first-time use, please set a password:
Then save it to BB.txt
When running the program again next time

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[ Last edited by HAT on 2008-12-13 at 22:56 ]

@echo off
if exist bb.txt goto next
set /p password=For first-time use, please set a password:
echo.%password%>bb.txt

:next
for /f "delims=" %%i in (bb.txt) do set passwords=%%i
:begin
cls&set /p password= Please enter the password:
...

Does the part from :set to :wrong have any chance to execute?

Can someone write code based on the above idea that can set a password and change a password?

Change:
if "%password%"=="%passwords%" goto ok
to:
if "%password%"=="%passwords%" goto set

@echo off



if exist %windir%\bb.txt goto check_pass

set /p password=Please set a password:&echo %password%>%windir%\bb.txt&goto opration_ver

:check_pass 

for /f "delims=" %%i in (%windir%\bb.txt) do set passwords=%%i

cls&set /p password=Please enter the password:

if "%password%"=="%passwords%" goto opration_ver

cls&echo   Wrong password&ping /n 2 127.1>nul&goto check_pass

Everyone help me take a look, with the code above, after setting the password the content written to bb.txt is: ECHO is off.
Where exactly is the problem?

:set_pass

cls&set /p New_pass=Please enter the new password:

cls&set /p New_pass1=Please enter the new password again:

if %New_pass% equ %New_pass1% echo %New_pass%>bb.txt&echo.Set successfully&pause&goto ok

echo.The two passwords entered do not match, please set it again&pause&goto set_pass

:ok

cls&echo   Correct password!&pause&goto :eof

This is the code for changing the password. Everyone take a look, is this okay?

@echo off

if exist M.RQM goto bn

rem llts in 0070303schj by qq251485609

@echo 12345678>M.RQM

:bn

@cls

@echo off

@echo.

@echo. 

@echo.

@echo                 For the security of the user's settings, only the administrator can enter operations in this program! 

@echo.

@echo.

@echo                                Enter T to exit

@echo.

@echo          -------         *         --------         *         --------

@echo.

@echo     Initial password: 12345678

@echo.

SET /P SY=     Please enter the administrator password:

FOR /F %%I IN (M.RQM) DO SET syq=%%I

IF "%SY%" == "%syq%" GOTO kyjr

IF "%SY%" == "CK" GOTO ckmm

IF "%SY%" == "T" GOTO :eof

@cls

@echo. 

@echo.

@echo.

@echo               Sorry, (the password may have been changed) you are not an administrator and cannot enter to use the operations!

pause>nul

@goto  bn

:kyjr

@cls

@echo.

SET /P SYg=   Password correct. Press any key to enter the program (if you need to change the password, please enter XGMM):

IF "%SYg%" == "XGMM" GOTO xg

IF not "%SYg%" == "XGMM" goto  k

:xg  

@cls

SET /P xmm=      Please enter the new password:

@cls

SET /P cxmm=    Please enter it once again:



IF "%cxmm%" == "%xmm%" GOTO gng

@echo Passwords do not match!

pause

goto xg

:gng

@echo %xmm%>M.RQM

@echo   Password changed successfully! Please remember this password %xmm%

pause>nul

goto bn

:ckmm

@cls

FOR /F %%I IN (M.RQM) DO SET syq=%%I

@echo %syq%

pause>nul

goto bn

:k

@cls

@echo  Entering the program

pause>nul

[ Last edited by ZJHJ on 2008-12-13 at 21:31 ]

Thanks, ZJHJ.
What I wanted was: if the M.rqm file does not exist, then prompt the user to set a password; if it exists, then use the contents of M.Rqm to verify the password. I've already solved the problem, thanks.