CHOICE--Examples
What the user sees when you use CHOICE in a batch file
If you use the following syntax in a batch file,
choice /c:ync
the user sees the following when CHOICE is started:
[Y,N,C]?
If you add text to the syntax,
choice /c:ync Yes, No, or Continue
the user sees the following when CHOICE is started:
Yes, No, or Continue [Y,N,C]?
What the user sees if you leave out a prompt
If, as in the following example, you use the /N switch to leave out the
prompt in a batch program,
choice /n Yes, No, or Continue?
the user sees only the text you specified when CHOICE is started:
Yes, No, or Continue?
What the user sees if you use the T switch
If you use the following syntax in a batch program,
choice /c:ync /t:n,5
the user sees the following when CHOICE is started:
[Y,N,C]?
If, after 5 seconds, the user hasn't pressed a key, CHOICE chooses N and
returns an ERRORLEVEL value of 2. If the user presses a key before 5
seconds, CHOICE returns the value corresponding to the user's choice.
To have the option of defragmenting drive C when you start your computer,
you could add the following lines to your AUTOEXEC.BAT file:
choice Defrag drive /ty,5
if errorlevel 2 goto SkipDefrag
defrag c:
:SkipDefrag
If you press N within 5 seconds, DEFRAG will not run and CHOICE returns an
ERRORLEVEL value of 2. If you do not press N within 5 seconds, or if you
choose Y, DEFRAG is run on drive C.
Using CHOICE in a batch program
The following batch program demonstrates using the CHOICE option to select
one of three programs: MS-DOS Editor, Microsoft Anti-Virus, or Microsoft
Backup.
Notice that the IF ERRORLEVEL statements are listed in decreasing order.
MS-DOS will consider the IF statement true if the ERRORLEVEL parameter
returned by CHOICE is greater than or equal to the parameter specified in
the IF command.
@echo off
cls
echo.
echo A Microsoft Editor
echo B Microsoft Anti-Virus
echo C Microsoft Backup
echo.
choice /c:abc Choose an option
if errorlevel 3 goto MSBackup
if errorlevel 2 goto Msav
if errorlevel 1 goto Edit
:Edit
edit
goto End
:Msav
msav
goto End
:Msbackup
msbackup
goto End
:End
Input any number using choice.com:
@echo off
:Choose_i
cls
choice/n/c1234567890- [%i%]. Choose an integer, Press Esc or - (minus:)
if errorlevel 12 if '=='%i% for %%v in (cls goto:Escaped) do %%v
if not errorlevel 10 for %%i in ( 1 2 3 4 5 6 7 8 9 ) do if errorlevel %
%i set i=%i%%%i
if not errorlevel 11 for %%v in ( if goto:Choose_i ) do %%v errorlevel 1
0 set i=%i%0
if errorlevel 12 set i=
if '==%i%' goto Choose_i
for %%v in (echo.[%i%]. pause) do %%v..
for %%v in (set: goto:Choose_) do %%vi=
:Escaped
Here's a better example,
(two lines got wrapped:)
@echo off
echo. Input the password or press the [F1] key twice:
choice /n/c:;0123456789'''''''ABCDEF > nul
for %%v in (0 1 2 3 4 5 6 7 8 9 A B C D E F) do if errorlevel }%%v set X
=%%v
choice /n/c;0123456789'''''''ABCDEF %X%
for %%v in (0 1 2 3 4 5 6 7 8 9 A B C D E F) do if errorlevel }%%v set X
=%X%%%v
ECHO.
ECHO. (Your input) = (%X%)
Bennylevel error checking
Examples:
@echo off
:test! (21 = ASCII()), (27 = ASCII())
set drive=
choice /n/cABCDEFGHIJKLMNOPQRSTUVWXYZ Choose a drive letter:
if not errorlevel 002 for %%v in ( cls goto:ESCaped! ) do %%v
set drive=Z Y X W V U T S R Q P O N M L K J I H G F E D C B A
for %%v in (%drive%) do if not errorlevel %%v set drive=%%v:
echo ------------------- %drive%
goto test!
:ESCaped!
@echo off
choice /n/c'01234567899999999ABCDEF Input a hex number. Range(00;FF):
cls
for %%v in (0 1 2 3 4 5 6 7 8 9 A B C D E F) do if errorlevel }%%v set v
=%%v
choice /n/c'01234567899999999ABCDEF %v%
for %%v in (0 1 2 3 4 5 6 7 8 9 A B C D E F) do if errorlevel }%%v set v
=%v%%%v
for %%v in (echo echo.%v% echo pause cls REM:%0) do %%v.
@echo off
choice /n/c'01234 Input a 2 digit number in range of 00 and 49:
for %%v in (cls set) do %%v v=0
for %%v in (1 2 3 4) do if errorlevel }%%v set v=%%v
choice /n/c'0123456789 %v%
for %%v in (0 1 2 3 4 5 6 7 8 9) do if errorlevel }%%v set v=%v%%%v
for %%v in (echo echo.%v% echo pause cls) do %%v.
:: Returns ASCII values:
:: For example, to test using an ASCII 5 char, hold [Alt] key and press [5]
::
@echo off
echo Input character: ASCII(Range(240;35)), press Ctrl+Z (or F6), Enter:
@ copy con A.tmp >nul
if not exist A.tmp for %%v in ( cls goto ) do %%v eof
find: " " < A.tmp >nul
if not errorlevel 1 for %%v in (set:v goto:end rem:TAB) do %%v=009
find: "þ" < A.tmp >nul
if not errorlevel 1 for %%v in (set:v goto:end rem:þ ) do %%v=254
echo þ>> A.tmp %[-- avoiding freeze of choice.com --]%
:: ASCII 254 char is also used to substitute "trouble-characters":
:: 240;35 240 250 0 10 20 30
:: 0123456789012345012345678901234567890123456789012345
choice /s/n/cþðñòóôõö÷øùúûüýþÿþþþþþþ þþþþþ þ!"#<A.tmp
if not errorlevel 2 goto msg
for %%v in (0 1 2 3 4 5 6 7 8 9) do if errorlevel }%%v set v=24%%v
for %%v in (0 1 2 3 4 5 ) do if errorlevel ~%%v set v=25%%v
for %%v in (0 1 2 3 4 5 6 7 8 9) do if errorlevel e%%v set v=00%%v
for %%v in (0 1 2 3 4 5 6 7 8 9) do if errorlevel f%%v set v=01%%v
for %%v in (0 1 2 3 4 5 6 7 8 9) do if errorlevel g%%v set v=02%%v
for %%v in (0 1 2 3 4 5 ) do if errorlevel h%%v set v=03%%v
:end
for %%v in (echo echo.Result:ÿ%v% echo pause erase:A.tmp ) do %%v.
for %%v in (set:v cls goto:eof) do %%v=
:msg
echo Out of range
echo or the ASCII value are one of those: 0 3 6 8 10 13 16 19 26 27 32
for %%v in (echo. pause cls %0) do %%v
:eof
For more examples, please follow this link.
Definition of BENNYLEVEL
@echo off
for %%v in (cls echo echo set:n) do %%v=
set v=if errorlevel greater than
strings e=ask ÿErrorlevel value to comparison: "%v%/equal VALUE": ,3
if %e%'==' %0
strings t=ask ÿASCII value of a second char T: "%v% or equal XT": ,3
if not %t%'==' set n= :: ::
%n%strings t=ask ÿOK! Input a second character T: "%v% or equal XT": ,1
%n%strings t=val %t%
if %t%'==' %0
strings ten[x]=add 272, %e%
strings ten[x]=sub %ten[x]%, %t%
strings v=right %ten[x]%, 1
strings v=parse . 768 . 256 . 1024 . 512 .,%v%,
if %v%'==.' goto e
strings ten[x]=add %ten[x]%, %v%
strings v=div %ten[x]%, 1280
if not %v%==0 strings ten[x]=sub %ten[x]%, 1280
strings ASCII[X1]=div %ten[x]%, 10
strings ASCII[X2]=add %ASCII[X1]%, 128
strings X1=char %ASCII[X1]%
strings X2=char %ASCII[X2]%
echo.
strings n=char 32,32,32,32,32,32,32,32,32,32
echo %n% Solution:
echo %n% x1: [ ASCII(%X1%) ] = [ %ASCII[X1]% ]
echo %n% x2: [ ASCII(%X2%) ] = [ %ASCII[X2]% ]
echo.
echo %n% 10(x -48) +(t -48) = 256n +e
echo %n% 10(%ASCII[X1]% -48) +%t% -48 = 256n +%e%
echo %n% 10(%ASCII[X2]% -48) +%t% -48 = 256n +%e%
echo.
echo %n% %n% IF ERRORLEVEL %e%
strings T=char %t%
for %%v in (%X1% %X2%) do echo %n% %n%=IF ERRORLEVEL %%v%T%
:e msg
if %v%==. for %%v in (echo echo.ÿNoÿSolution) do %%v.
:end
for %%v in (e t v ten[x] n ASCII[X1] X1 ASCII[X2] X2) do set %%v=
for %%v in (echo. echo. pause cls) do %%v
Using CHOICE with special keys
Example: CHOICE /n/s/c:qQ Hit the [Page Down] key or press [q] to quit:
The following is the list of those special keys:
27 [Esc] 08 [Back Space]
R [Insert] G [Home] I [Page Up]
S [Delete] O [End] Q [Page Down]
H [UP Arrow]
K [Left Arrow] P [Down Arrow] M [Right Arrow]
; [F1] = [F3]
? [F5] @ [F6] A [F7] B [F8]
C [F9] D [F10] 133 [F11] 134 [F12]
Note: The numbers; 27, 08, 133 and 134 are ASCII values.
The following batch file creates this syntax for CHOICE:
@echo off
echo e0100'@echo'20'off'D''A'choice'20''2F'n'2F's'2F> %temp%.\~test.bat
echo f117L16'c'1B''8'RSGOIQPKMH'3B''3D''3F'@ABCD'85>> %temp%.\~test.bat
for %%v in (e012D''86''D''A rcx 30 w q) do echo %%v>> %temp%.\~test.bat
type %temp%.\~test.bat | debug %temp%.\~test.bat
echo if not errorlevel 2 goto:Esc (that key press.)>> %temp%.\~test.bat
::for %%v in ( 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 ) do
::if errorlevel %%v %comspec%/cECHO %%v
for %%v in (echo. pause cls goto:Begin) do echo %%v>> %temp%.\~test.bat
echo :: Create a menu along with the missing labels>> %temp%.\~test.bat
edit %temp%.\~test.bat
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