windows 如何在 BATCH 脚本中使用随机数？
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How to use random in BATCH script?
提问by IAdapter
How to use random in BATCH script?
如何在 BATCH 脚本中使用随机数？
回答by mousio
%RANDOM%gives you a random number between 0 and 32767.
%RANDOM%给你一个 0 到 32767 之间的随机数。
Using an expression like SET /A test=%RANDOM% * 100 / 32768 + 1, you can change the range to anything you like (here the range is [1…100] instead of [0…32767]).
使用类似 的表达式SET /A test=%RANDOM% * 100 / 32768 + 1，您可以将范围更改为您喜欢的任何内容（这里的范围是 [1…100] 而不是 [0…32767]）。
回答by GaryNg
%RANDOM% gives you a random number between 0 and 32767.
%RANDOM% 为您提供 0 到 32767 之间的随机数。
You can control the number's range with:
您可以通过以下方式控制数字的范围：
set /a num=%random% %%100
- will produce number between 0~99.
- 将产生0~99之间的数字。
This one:
这个：
set /a num=%random% %%100 +1
- will produce number between 1~100.
- 将产生 1~100 之间的数字。
回答by indiv
You'll probably want to get several random numbers, and may want to be able to specify a different range for each one, so you should define a function. In my example, I generate numbers from 25 through 30 with call:rand 25 30. And the result is in RAND_NUMafter that function exits.
您可能希望获得多个随机数，并且可能希望能够为每个随机数指定不同的范围，因此您应该定义一个函数。在我的示例中，我使用call:rand 25 30. 结果是在RAND_NUM该函数退出后。
@echo off & setlocal EnableDelayedExpansion
for /L %%a in (1 1 10) do (
call:rand 25 30
echo !RAND_NUM!
)
goto:EOF
REM The script ends at the above goto:EOF. The following are functions.
REM rand()
REM Input: %1 is min, %2 is max.
REM Output: RAND_NUM is set to a random number from min through max.
:rand
SET /A RAND_NUM=%RANDOM% * (%2 - %1 + 1) / 32768 + %1
goto:EOF
回答by Evgeny Gavrin
@echo off & setLocal EnableDelayedExpansion
for /L %%a in (1 1 100) do (
echo !random!
)
回答by calebhk98
You could do it this way, which does not require EnableDelayedExpansion
你可以这样做，这不需要 EnableDelayedExpansion
:choosenamea
cls
set /a choosemname=%random%
if %choosemname% GTR %max% goto choosenameb
if %choosemname% LSS %min% goto choosenameb
goto gotnamenow
where maxis your max and minis your minimum. This is not very efficient since might take a lot of rounds if your range is too small. Also, this will not work for numbers larger than 32767.
max你的最大值在哪里，你的最小值在哪里min。这不是很有效，因为如果您的范围太小，可能需要很多回合。此外，这不适用于大于 32767 的数字。
回答by Jacob
set /a number=%random% %% [maximum]-[minimum]
example "
例子 ”
set /a number=%random% %% 100-50
will give a random number between 100 and 50. Be sure to only use one percentage sign as the operand if you are not using the line in a batch script!
将给出一个 100 到 50 之间的随机数。如果您不在批处理脚本中使用该行，请确保只使用一个百分号作为操作数！
回答by Sinji58
@echo off
title Professional Hacker
color 02
:matrix
echo %random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%
echo %random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%
echo %random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%
echo %random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%
echo %random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%
echo %random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%
echo %random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%
echo %random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%
goto matrix
回答by user3542843
Let's say you want a number 1-5; you could use the following:
假设您想要一个数字 1-5；您可以使用以下内容：
:LOOP
set NUM=%random:~-1,1%
if %NUM% GTR 5 (
goto LOOP )
goto NEXT
Or you could use :~1,1 in place of :~-1,1. The :~-1,1 is not needed, but it greatly reduces the amount of time it takes to hit the right range. Let's say you want a number 1-50, we need to decide between 2 digits and 1 digit. Use:
或者您可以使用 :~1,1 代替 :~-1,1。:~-1,1 不是必需的，但它大大减少了达到正确范围所需的时间。假设您想要一个数字 1-50，我们需要在 2 位数和 1 位数之间做出决定。用：
:LOOP
set RAN1=%random:~-1,1%
if %RAN1% GTR 5 (
goto 1 )
if %RAN1%==5 (
goto LOOP )
goto 2
:1
set NUM=%random:~-1,1%
goto NEXT
:2
set NUM=%random:~-1,2%
goto NEXT
You can add more to this algorithm to decide between large ranges, such as 1-1000.
您可以向此算法添加更多内容以在大范围（例如 1-1000）之间做出决定。
回答by simple
@(IF not "%1" == "max" (start /MAX cmd /Q /C %0 max&X)ELSE set C=1&set D=2&wmic process where name="cmd.exe" CALL setpriority "REALTIME">NUL)&CLS
:Y
title %random%6%random%%random%%random%%random%9%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%&color %D%&ECHO %random%%C%%random%%random%%random%%random%6%random%9%random%%random%%random%%random%%random%%random%%random%%random%%random%&(IF %C% EQU 46 (TIMEOUT /T 1 /NOBREAK>nul&set C=1&CLS&IF %D% EQU 9 (set D=1)ELSE set /A D=%D%+1)ELSE set /A C=%C%+1)&goto Y
simplified with multiple IF statements and plenty of ((()))
使用多个 IF 语句和大量 ((())) 进行简化
回答by strance
And just to be completely random for those who don't always want a black screen.
对于那些并不总是想要黑屏的人来说，这只是完全随机的。
@(IF not "%1" == "max" (start /MAX cmd /Q /C %0 max&X)ELSE set A=0&set C=1&set V=A&wmic process where name="cmd.exe" CALL setpriority "REALTIME">NUL)&CLS
:Y
(IF %A% EQU 10 set A=A)&(IF %A% EQU 11 set A=B)&(IF %A% EQU 12 set A=C)&(IF %A% EQU 13 set A=D)&(IF %A% EQU 14 set A=E)&(IF %A% EQU 15 set A=F)
(IF %V% EQU 10 set V=A)&(IF %V% EQU 11 set V=B)&(IF %V% EQU 12 set V=C)&(IF %V% EQU 13 set V=D)&(IF %V% EQU 14 set V=E)&(IF %V% EQU 15 set V=F)
(IF %A% EQU %V% set A=0)
title %A%%V%%random%6%random%%random%%random%%random%9%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%&color %A%%V%&ECHO %random%%C%%random%%random%%random%%random%6%random%9%random%%random%%random%%random%%random%%random%%random%%random%%random%&(IF %C% EQU 46 (TIMEOUT /T 1 /NOBREAK>nul&set C=1&CLS&SET /A A=%random% %%15 +1&SET /A V=%random% %%15 +1)ELSE set /A C=%C%+1)&goto Y
This will change screen color also both are random.
这将改变屏幕颜色也是随机的。
