China DOS Union

@echo off

Setlocal Enabledelayedexpansion

set "var1=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"

for /l %%a in (1 1 26) do (set "var2=!var2!%%a ")

for %%a in (%var1%) do (set /a "nn+=1"&set "!nn!=%%a"&set "%%a=!nn!")

echo %var1%&echo %var2%&echo.

:lp

set /a "bt=%random%%%26+1","aa=%random%%%2+1"

for /f "tokens=%bt%" %%a in ("!var%aa%!") do (

   if defined .%%a goto :lp

   if defined .!%%a! goto :lp

   set "ech=!ech! %%a"

   set ".%%a=ok"&set ".!%%a!=ok"

)

set /a mm+=1

if %mm% lss 10 goto :lp

echo %ech%

for %%a in (%var1%) do (set ".%%a="&set ".!%%a!=")

set "mm=0"&set "ech="

pause>nul&goto :lp

[ Last edited by moniuming on 2008-8-25 at 02:33 PM ]

Thanks to the senior for the guidance...
Will go to study...

The code on floor 16 uses if judgment and return, so it has efficiency issues to a certain extent, and the code is also more complicated, but it is still given points for encouragement.

The following is my solution:

@echo off&setlocal enabledelayedexpansion

for %%i 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 /a n+=1,a=!random!%%2

    if !a! equ 0 (

      set "_!random!!random!!random!=!n!"

      ) else (

      set "_!random!!random!!random!=%%i"

   )

)

for /f "tokens=2 delims==" %%i in ('set _') do (

    set /a n-=1

    if !n! equ 15 pause>nul&goto :eof 

    set /p=%%i <nul

)

Brother zw's code is really powerful...

Can you write comments?
Can you explain the thinking process?

[ Last edited by BC on 2008-8-25 at 08:07 PM ]

Can the moderator brother explain what the meaning of three random numbers connected together is in the following code:
set "_!random!!random!!random!=!n!"
) else (
set "_!random!!random!!random!=%%i"

I'm a newbie, but I did it, and the meaning fully meets the requirements of the topic!
@echo off&setlocal enabledelayedexpansion
set char1=abcdefghijklmnopqrstuvwxyz
set char3=1
set num=0
:loop
set /a ran=%random%%%26
set char2=!char1:~%ran%,1!
set /a num1=%ran%+1
if %num% lss 10 (
echo %char3%|find "%char2%" 1>nul
if errorlevel 1 ( set char3=%char3%%char2%&echo %num1%--%char2%&set /a num+=1&goto loop ) else ( goto loop ) )
pause

Please provide the specific code content that needs to be analyzed so that I can help you translate the relevant request and the code for analysis.

@echo off&setlocal enabledelayedexpansion
set char1=abcdefghijklmnopqrstuvwxyz
set char3=1
set num=0
:loop
set /a ran=%random%%%26-------This line sets a random number from 0 to 25
set char2=!char1:~%ran%,1!-------This line gets the character corresponding to the random number, for example, if the random number is 5, then it corresponds to 'f' because 0 corresponds to 'a'
set /a num1=%ran%+1------This line is the random number +1, which is mainly used for the subsequent output. 1 corresponds to 'a'
if %num% lss 10 ( -------This line is a loop, looping 10 times
echo %char3%|find "%char2%" 1>nul -----This line judges whether this random number has been generated before
if errorlevel 1 ( set char3=%char3%%char2%&echo %num1%--%char2%&set /a num+=1&goto loop ) else ( goto loop ) ) -------This line is connected to the previous line. If this random number has been generated before, continue to the next loop. If not, increment the loop count by 1, then output the corresponding number and letter, and then continue the loop, so as to remove the situation where the first random generation is 1 and the second random generation is still 1. I think this analysis is all understood
pause

&&The attitude of the brother upstairs is still very serious and worthy of praise, but your code does not meet the requirements:
1. What you generated is a corresponding relationship, which is already a condition given in the question in advance and does not need to be generated again;
2. According to your code, only 10 different pure number sequences or pure letter sequences can be generated, while the question requires random value sequences composed of letters and numbers and having no corresponding relationship with each other;
3. The same as other previous codes, using if judgment + return (in your code, it is manifested as not accumulating the count), which has efficiency problems;
4. Using pipes also reduces code efficiency.