China DOS Union

-- Unite DOS · Advance DOS · Grow DOS --
Union site: www.cn-dos.net　Forum site: www.cn-dos.net/forum

中国DOS联盟论坛
The time now is 2026-09-24 04:04

47,812 topics / 349,917 posts / today 0 new / 48,274 members

DOS批处理 & 脚本技术（批处理室） » Understanding the interception function of variable characters in CMD

Floor16　lotus516	Posted 2007-01-14 03:57
高级用户　Posts 246　Credits 551
Thanks to brother lxmxn, it has been very helpful to beginners like us!

Floor19　wuyugui	Posted 2007-01-15 23:48
初级用户　Posts 8　Credits 20
It's too complicated, I can't understand. Can you add annotations to each line? How is the calling and looping process? Please tell me. As for CALL goto :eof, I can't understand this thing. Can you explain the call goto :eof? Thank you!

Floor20　lxmxn	Posted 2007-01-16 04:39
版主　Posts 4,938　Credits 11,386
The call can invoke some external commands and internal commands, and can also invoke the label segments within the batch processing program. Here, call :print means invoking the :print program segment below this batch processing program. In addition, the call can also call the batch program segment with parameters. 　　goto :eof means jumping out of this label if it is inside a label, and if it is in other positions of the batch processing program, it means jumping to the end of the batch processing program, that is, exiting the batch program.

Floor21　lbqldos	Posted 2007-02-02 08:06
新手上路　Posts 7　Credits 16
Wonderful, learned something, thanks!

Floor22　lpclimber	Posted 2007-03-04 22:14
初级用户　Posts 85　Credits 168
Wow, that's impressive! Need to study hard!

Floor23　qingfushuan	Posted 2007-03-04 22:42
高级用户　Posts 327　Credits 502
With LZ's strength, he can definitely make another similar delay variable .bat. Eagerly looking forward to it.

Floor24　tianlijian	Posted 2007-03-14 04:53
初级用户　Posts 45　Credits 120
In the batch command `echo\&pause&cls&echo.`, the backslash (`\`) here is just a literal character. In the context of a batch file, it doesn't have a special syntactic meaning like in some other programming languages. It's probably just part of the text that's being output or manipulated as part of the command sequence. So it's essentially just a character included in the string that the commands are dealing with.

Floor25　yangzhiyi	Posted 2007-03-17 09:49
中级用户　Posts 123　Credits 261
Wow, so powerful, really strong. Then it jumps back later, the loop is really well done.

Floor26　HUNRYBECKY	Posted 2007-03-17 11:47
银牌会员　Posts 442　Credits 1,179
Not bad. Favorite. Haven't studied this aspect in depth yet

Floor27　star8289	Posted 2007-03-22 05:01
新手上路　Posts 5　Credits 12
echo %%var:~%1,%2%% The characters after interception are: !var:~%1,%2! -------------------This sentence is not very clear. Can you explain it in detail? Thank you~

Floor28　enliang	Posted 2007-03-22 05:16
初级用户　Posts 24　Credits 62
Newcomer, still some parts are not understandable

Floor29　lxmxn	Posted 2007-03-22 07:51
版主　Posts 4,938　Credits 11,386
Re tianlijian: The symbols such as / and ; , . \ here have the same function, indicating to output an empty line. Re star8289: You can analyze its function in combination with the output of the code, where %1 and %2 represent the first and second command line parameters.

Floor30　zzhh612	Posted 2007-03-25 10:06
中级用户　Posts 103　Credits 278
Can we make all batch commands into this kind of batch code with a demonstration function. But this is something that only experts can do. I hope someone interested will do this meaningful thing

Prev　 1 2 3 4 5 … 7 　Next