Please tell me the usage of the shift batch command? - China DOS Union Forum

In batch processing of DOS, only 9 command-line parameters from %1 to %9 are supported (%0 is used to represent the command itself). If you want your batch to support more than 9 command-line parameters, you need to use the shift command. Each time the shift command is run, the command-line parameters shift left by one position, that is, %2 becomes %1, %3 becomes %2, and so on. A simple example: You create a batch file, suppose it is named tstshift.bat, and the content is as follows:
@echo off
echo %0
echo %1 %2 %3 %4 %5 %6 %7 %8 %9
echo %1
::1
shift
echo %1
::2
shift
echo %1
::3
shift
echo %1
::4
shift
echo %1
::5
shift
echo %1
::6
shift
echo %1
::7
shift
echo %1
::8
shift
echo %1
::9
shift
echo %1
::10
shift
echo %1
Then run:
tstshift 0 1 2 3 4 5 6 7 8 9 a The running result is as follows:
D:\>tstshift 0 1 2 3 4 5 6 7 8 9 a
tstshift
0 1 2 3 4 5 6 7 8
0
1
2
3
4
5
6
7
8
9
a The above are all the functions supported by the shift command. And the shift function under 2000/xp/2003 has a new /n parameter, which is used to specify starting from the nth parameter for shifting. The Chinese help of the shift command under 2000/xp/2003 is:
D:\>shift /?
Change the position of replaceable parameters in a batch file. SHIFT If command extensions are enabled, the SHIFT command supports the /n command-line switch; this command-line switch tells
The command to shift starting from the nth parameter; n is between zero and eight. For example: SHIFT /2 would shift %3 to %2, shift %4 to %3, and so on; and it does not affect %0 and %1.

Floor1　doslr	Posted 2004-11-08 00:00
初级用户　Posts 27　Credits 168
I really don't understand the usage of the shift command?? Can any expert teach me how the shift command is used? Finally, can you attach an example. Thanks!

Floor2　autoit	Posted 2004-11-09 00:00
系统支持　Posts 339　Credits 904　From 厦门
更改批处理文件中可替换参数的位置。SHIFT 如果启用了命令扩展，SHIFT命令支持/n开关，该开关告诉命令从第n个参数开始移位，其中n可以在0到8之间。例如：SHIFT /2会将%3移到%2，%4移到%3，等等，并且不影响%0和%1。 The SHIFT command changes the position of replaceable parameters in a batch file. SHIFT If Command Extensions are enabled, the SHIFT command supports the /n switch, which tells the command to start shifting at the nth argument, where n can be between 0 and 8. For example: SHIFT /2 would shift %3 to %2, %4 to %3, etc., and leave %0 and %1 unaffected.

Floor3　Climbing	Posted 2004-11-10 00:00
铂金会员　Posts 2,753　Credits 6,962　From 河北保定
In batch processing of DOS, only 9 command-line parameters from %1 to %9 are supported (%0 is used to represent the command itself). If you want your batch to support more than 9 command-line parameters, you need to use the shift command. Each time the shift command is run, the command-line parameters shift left by one position, that is, %2 becomes %1, %3 becomes %2, and so on. A simple example: You create a batch file, suppose it is named tstshift.bat, and the content is as follows: @echo off echo %0 echo %1 %2 %3 %4 %5 %6 %7 %8 %9 echo %1 ::1 shift echo %1 ::2 shift echo %1 ::3 shift echo %1 ::4 shift echo %1 ::5 shift echo %1 ::6 shift echo %1 ::7 shift echo %1 ::8 shift echo %1 ::9 shift echo %1 ::10 shift echo %1 Then run: tstshift 0 1 2 3 4 5 6 7 8 9 a The running result is as follows: D:\>tstshift 0 1 2 3 4 5 6 7 8 9 a tstshift 0 1 2 3 4 5 6 7 8 0 1 2 3 4 5 6 7 8 9 a The above are all the functions supported by the shift command. And the shift function under 2000/xp/2003 has a new /n parameter, which is used to specify starting from the nth parameter for shifting. The Chinese help of the shift command under 2000/xp/2003 is: D:\>shift /? Change the position of replaceable parameters in a batch file. SHIFT If command extensions are enabled, the SHIFT command supports the /n command-line switch; this command-line switch tells The command to shift starting from the nth parameter; n is between zero and eight. For example: SHIFT /2 would shift %3 to %2, shift %4 to %3, and so on; and it does not affect %0 and %1.

Floor4　doslr	Posted 2004-11-12 00:00
初级用户　Posts 27　Credits 168