Please help me take a look at this batch file - China DOS Union Forum

SHIFT

　　Changes the position of replaceable parameters in a batch program.

　　

　　Syntax

　　
　　SHIFT

　　SHIFT─Notes

　　How the SHIFT command works

　　The SHIFT command changes the values of replaceable parameters %0 to %9 by copying each parameter to the previous parameter. That is, the value of %1 is copied to %0, the value of %2 is copied to %1, and so on. This command is useful for batch files that perform the same operation on a series of parameters.

　　

　　:m567

　　Using more than 10 command-line parameters

　　

　　Using the SHIFT command, a batch file can also receive more than 10 command-line parameters. If the specified command-line parameters exceed 10, then the parameters appearing after the 10th parameter (%9) will in turn be shifted into (%9).

　　

　　Restoring replaceable parameters

　　The SHIFT command is irreversible. Once the SHIFT command has been executed, the first parameter before the SHIFT command (%0) cannot be restored.

　　

　　

　　SHIFT─Example

　　The following batch file MYCOPY.BAT shows how to use the SHIFT command to process any number of command-line parameters and copy a series of files to a specified directory. The parameters used are the directory name followed by a series of file names.

　　

　　@echo off

　　rem MYCOPY.BAT copies any number of files

　　rem to a directory。

　　rem The command uses the following syntax:

　　rem mycopy dir file1 file2 ...

　　set todir=%1

　　:getfile

　　shift

　　if "%1"=="" goto end

　　copy %1 %todir%

　　goto getfile

　　:end

　　set todir=

　　echo All done

　　

Floor1　oceanwind	Posted 2006-01-31 12:56
初级用户　Posts 12　Credits 136
Here is a batch file. I don't understand it. I don't understand SHIFT or the parameters. REM MYCOPY.BAT copies any number of REM files to a directory. The command REM is MYCOPY DIR FILES SET TODIR=%1 :ONE SHIFT IF"%1"=" "GOTO TWO COPY %1 %TODIR% GOTO ONE :TWO SET TODIR= ECHO ALL DONE Thanks in advance

Floor2　lks205	Posted 2006-01-31 14:30
初级用户　Posts 32　Credits 86
I'm just thinking of learning this. Friend in the post above, could you send me a SHIFT program? I'm trying to study it, thanks. lks205#163.com　(please change ＃ to ＠)

Floor3　oceanwind	Posted 2006-01-31 16:29
初级用户　Posts 12　Credits 136
Replied already, thanks

Floor4　JonePeng	Posted 2006-01-31 18:19
金牌会员　Posts 1,883　Credits 4,562　From 广东广州
The function of Shift is to move the command-line parameters forward, that is, %2 becomes %3, %2 becomes %1, and so on.

Floor5　lks205	Posted 2006-01-31 20:24
初级用户　Posts 32　Credits 86
SHIFT 　　Changes the position of replaceable parameters in a batch program. 　　　　Syntax 　　　　SHIFT 　　SHIFT─Notes 　　How the SHIFT command works 　　The SHIFT command changes the values of replaceable parameters %0 to %9 by copying each parameter to the previous parameter. That is, the value of %1 is copied to %0, the value of %2 is copied to %1, and so on. This command is useful for batch files that perform the same operation on a series of parameters. 　　　　:m567 　　Using more than 10 command-line parameters 　　　　Using the SHIFT command, a batch file can also receive more than 10 command-line parameters. If the specified command-line parameters exceed 10, then the parameters appearing after the 10th parameter (%9) will in turn be shifted into (%9). 　　　　Restoring replaceable parameters 　　The SHIFT command is irreversible. Once the SHIFT command has been executed, the first parameter before the SHIFT command (%0) cannot be restored. 　　　　　　SHIFT─Example 　　The following batch file MYCOPY.BAT shows how to use the SHIFT command to process any number of command-line parameters and copy a series of files to a specified directory. The parameters used are the directory name followed by a series of file names. 　　　　@echo off 　　rem MYCOPY.BAT copies any number of files 　　rem to a directory。　　rem The command uses the following syntax: 　　rem mycopy dir file1 file2 ... 　　set todir=%1 　　:getfile 　　shift 　　if "%1"=="" goto end 　　copy %1 %todir% 　　goto getfile 　　:end 　　set todir= 　　echo All done