如何在BATCH脚本中使用随机？

如何在BATCH脚本中使用随机？

%RANDOM% 为您提供0到32767之间的随机数。

使用类似的表达式SET /A test=%RANDOM% * 100 / 32768 + 1，您可以将范围更改为任意值（此处的范围是[1…100]而不是[0…32767]）。

％RANDOM％为您提供0到32767之间的随机数。

您可以使用以下方法控制数字范围：

set /a num=%random% %%100

-将产生介于0到99之间的数字。

这个：

set /a num=%random% %%100 +1

-将产生1〜100之间的数字。

您可能希望获得几个随机数，并且可能希望能够为每个数字指定不同的范围，因此您应该定义一个函数。在我的示例中，我使用生成从25到30的数字call:rand 25 30。结果是RAND_NUM该函数退出后的结果。

@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

@echo off & setLocal EnableDelayedExpansion

for /L %%a in (1 1 100) do (
echo !random!
)

您可以通过这种方式进行，不需要 EnableDelayedExpansion

:choosenamea
cls
set /a choosemname=%random%

if %choosemname% GTR %max% goto choosenameb
if %choosemname% LSS %min% goto choosenameb
goto gotnamenow

max最大和min最小是哪里？这不是很有效，因为如果您的范围太小，可能会花费很多回合。同样，这不适用于大于32767的数字。

假设您要输入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

或者您可以使用：〜1,1代替：〜-1,1。：〜-1,1是不需要的，但是它大大减少了达到正确范围所需的时间。假设您想要一个1-50的数字，我们需要在2位数和1位数之间进行选择。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

您可以向此算法添加更多内容，以在较大范围（例如1-1000）之间进行决定。

set /a number=%random% %% [maximum]-[minimum]

例子

set /a number=%random% %% 100-50

会给出100到50之间的随机数。如果您未在批处理脚本中使用该行，请确保仅使用一个百分号作为操作数！

@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

@(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

使用多个IF语句和大量（（（（）））

对于不总是想要黑屏的用户，完全是随机的。

@(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

这将更改屏幕颜色，并且两者都是随机的。

如果您将其除以某个较大的值，则将得到大量的重复项。您需要做的是对％RANDOM％值取模：

@echo off
REM 
SET maxvalue=10
SET minvalue=1

SETLOCAL 
SET /A tmpRandom=((%RANDOM%)%%(%maxvalue%))+(%minvalue%)
echo "Tmp random: %tmpRandom%"
echo "Random:  %RANDOM%"
ENDLOCAL

这是我为您创建的示例，它应显示一个对话框，要求您选择一个1-10的数字，具体取决于您选择的数字，它将为您命名的批处理文件生成一个随机数字示例。如果选择“ 1”，则将获得一个随机的1位数示例。如果选择“ 10”，则将获得一个随机的10位数字示例。

@echo off
color f0
set /p "FileName= Enter Filename (Without Extension) : "
echo @echo off >> %FileName%.bat
echo File Created!
pause
cls
:CommandLine
set /p "calc= ~%ComputerName%: Enter a number to recieve the amount of  random digits :"
if %calc%==genrand_help goto GenerateRandomHelp
if %calc%==1 echo echo %%RANDOM:~-1%% >> %FileName%.bat
if %calc%==2 echo echo %%RANDOM:~-1%%%%RANDOM:~-1%% >> %FileName%.bat 
if %calc%==3 echo echo %%RANDOM:~-1%%%%RANDOM:~-1%%%RANDOM:~-1%% >>  %FileName%.bat
if %calc%==4 echo echo %%RANDOM:~-1%%%%RANDOM:~-1%%%%RANDOM:~-1%%%%RANDOM:~-1%% >> %FileName%.bat
if %calc%==5 echo echo %%Random%% >> %FileName%.bat
if %calc%==6 echo echo %%Random%%%%RANDOM:~-1%% >> %FileName%.bat
if %calc%==7 echo echo %%Random%%%%RANDOM:~-1%%%%RANDOM:~-1%% >> %FileName%.bat 
if %calc%==8 echo echo %%Random%%%%RANDOM:~-1%%%%RANDOM:~-1%%%%RANDOM:~-1%% >> %FileName%.bat
if %calc%==9 echo echo  %%Random%%%%RANDOM:~-1%%%%RANDOM:~-1%%%%RANDOM:~-1%%%%RANDOM:~-1%% >>  %FileName%.bat
if %calc%==10 echo echo %%Random%%%%Random%% >> %FileName%.bat  
goto CommandLine

现在具有dos彩虹的所有颜色

@(IF not "%1" == "max" (start /MAX cmd /Q /C %0 max&X)
  ELSE set C=1&set D=A&wmic process where name="cmd.exe" CALL setpriority "REALTIME">NUL)&CLS
:Y
set V=%D%

(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)
title %random%6%random%%random%%random%%random%9%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%&color %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&IF %D% EQU 15 (set D=1)ELSE set /A D=%D%+1)
  ELSE set /A C=%C%+1)&goto Y

只是完全随机，完全缺乏秩序： SET /A V=%random% %%15 +1

@(IF not "%1" == "max" (start /MAX cmd /Q /C %0 max&X)ELSE set C=1&set V=A&wmic process where name="cmd.exe" CALL setpriority "REALTIME">NUL)&CLS
:Y
(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)
title %V%%random%6%random%%random%%random%%random%9%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%%random%&color %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 V=%random% %%15 +1)ELSE set /A C=%C%+1)&goto Y