【练习-039】批处理输出设定范围内的字母

@echo off
setlocal enabledelayedexpansion
set "line=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 %%i in (!line!) do (set /a n+=1 & set _!n!=%%i)
set /a aa=%random%%%26+1
set /p bb=请输入一个0－－26之间的随机数
if !aa! leq !bb! (
for /l %%i in (!aa!,1,!bb!) do set /p =!_%%i! <nul
) else (
for /l %%i in (!bb!,1,!aa!) do set /p =!_%%i! <nul
)
pause>nulCOPY

请输入1-26中的任意一个数值：3
c和w之间的字母是：defghijklmnopqrstuvCOPY

@echo off
setlocal enabledelayedexpansion
set "line=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 %%i in (!line!) do (set /a n+=1 & set _!n!=%%i)
set /a aa=%random%%%26+1
set /p bb=请输入一个1－26之间的随机数:
if !aa! lss !bb! (set cc=!aa!&set aa=!bb!&set bb=!cc!)
set /a cc=%aa%-%bb%
call set /p=%%_%bb%%%和<nul & call set /p=%%_%aa%%%之间的字母是：<nul
if %cc%==0  (set /p=空<nul) else (
 if %cc%==1 (set /p=空<nul) else (
  set /a a2=!aa!-1
  set /a b2=!bb!+1
  for /l %%i in (!b2!,1,!a2!) do set /p =!_%%i! <nul
)
)
echo.
pause>nulCOPY

@echo off
SetLocal EnableDelayedExpansion
set "var= abcdefghijklmnopqrstuvwxyz"
set /p Get_var=
set bc=%random%%random%%random%
set count=1
:Count
    if %count% lss 27 (
        if "!var:~%count%,1!" equ "!Get_var!" set /a Num1=count
        set /a count+=1
        goto :Count
        )
    set/p,=!Num1! <nul
:GetRan
    set /a Ran=%random%%%26+1
    set/p,=!Ran!<nul
    set /a Tem=Ran-Num1
    if %Tem% lss 0 (set /a n1=Ran+1,n2=Num1-Ran-1) else (if %Tem% gtr 0 (set /a n1=Num1+1,n2=Tem-1) else (goto :GetRan))
 
:Print
    echo. !var:~%n1%,%n2%!COPY

@echo off
SetLocal EnableDelayedExpansion
set "var=abcdefghijklmnopqrstuvwxyz"
set /p Input=Enter a number 
 
:Get_Ran
    set /a Ran=%random%%%26+1
    set/p,=%Input% %Ran%<nul
    if %Ran% equ %Input% goto :Get_Ran
    if %Ran% lss %Input% (
        set /a N1=%Ran%,N2=%Input%-%Ran%-1
        ) else (
        set /a N1=%Input%,N2=%Ran%-%Input%-1
        )
:Print 
    echo. !var:~%N1%,%N2%!
    pause>nulCOPY