China DOS Union

If there is a file Try.txt with the following content

AAA    = 10.7

BBB    = 11.6

CCC    = 13.4

DDD    = 15.8

EEE    = 17.1

If you want to use a batch file to replace the line

"CCC    = 13.4" 

with

"CCC    = 55.33" 

How should this be written

Thank you

This problem should be encountered by quite a few people
Or is it needed
Is it too simple or unsolvable ah
No news at all @@

Are third-party tools allowed? If allowed, you can try tools like XCHANGE, which can be solved in one line. For example, try this command (XCHANGE is in the attachment):

XCHANGE Try.txt "CCC = 13.4" "CCC = 55.33"

Is there a detailed application explanation of this tool?

```@echo off & setlocal EnableDelayedExpansion
echo.>n_try.txt
for /f "tokens=1,2,3*" %%i in (try.txt) do set var1=%%i && if "CCC " == "!var1!" (echo CCC = 55.33>>n_try.txt) else (echo %%i %%j %%k>>n_try.txt)
pause

I use HEXC, which is only 5KB, smaller than XCHANGE, but the function is a bit simpler, it's enough.
hexc Try.txt Try.txt "CCC = 13.4" "CCC = 55.33" /u

It is best not to use third - party tools, otherwise the value of batch processing cannot be realized

Re vptdosme:

Brother arding provided a program on the 5th floor. That is, if there is no third-party program used in CMD, if you want to implement it under Win9x/DOS, it will be much more complicated. You need to use a text traversal algorithm or use an ASCII assembler to echo out a similar replacement program for replacement. Unless it is really necessary, it is generally not recommended to adopt it.

Originally posted by Wengier at 2005-12-11 11:29:
Is third-party tool usage allowed? If allowed, you can try tools like XCHANGE, which can be solved in one line. For example, try this command (XCHANGE is in the attachment):

XCHANGE Try.txt "CCC ...

Sorry, this method doesn't seem to work
Because CCC =12.5 #TEST
If it is CCC =12.5 #TEST
The number of spaces after each person's modification is not fixed, so that's why my title says
Modify specific line data
And the version owner proposed a string, so can you help solve it?
Thanks

Originally posted by arding at 2006-1-12 20:18:

@echo off & setlocal EnableDelayedExpansion

echo.>n_try.txt

for /f "tokens=1,2,3*" %%i in (try.txt) do set var1=%%i && if "CCC " == "!var1!" (ec ... 

This method can indeed modify, but there is a problem. It will cut off the data. That is, when your space is generated by the TAB key, the subsequent data is all cut off. Is there a way to overcome this? Thanks.
Modify the line 11b_ATTEN_DUT_PM

Original data

11b_ATTEN_DUT_SA              = 15.5;	# Attenuation at 2.5GHz between DUT and spectrum analyzer (double)

11b_ATTEN_FIXED_DUT_GOLDEN    = 41.8;   # Fixed attenuation at 2.5GHz between DUT and GOLDEN (double)

11b_ATTEN_DUT_PM              = 21.4;  	# Attenuation at 2.5GHz between DUT and power meter (double)

Data after execution

11b_ATTEN_DUT_SA    = 15.5;

11b_ATTEN_FIXED_DUT_GOLDEN    = 41.8;

11b_ATTEN_DUT_PM    = 33.55;

Re dosfroum:

This has nothing to do with tab. When /f is used without parameters, it recognizes tab as a delimiter. The main reason is that the output of %%l is omitted in the original program. The example is as follows:

@echo off

if exist tabo.txt del tabo.txt

for /f "tokens=1,2,3*" %%i in (tab.txt) do (

    if "%%i"=="11b_ATTEN_DUT_PM" (echo %%i   %%j 33.55 %%l>>tabo.txt) else (echo %%i   %%j %%k %%l>>tabo.txt)

)

Re willsort:

There is a small mistake in your program, the semicolon is lost. Also, the program did not generate the "execution data" that dosfroum expects; instead, it followed the subsequent comments.

Re 220110:

The semicolon was indeed my oversight; due to time constraints, I didn't conduct strict testing. As for the comments, my understanding is that Brother dosfroum hoped to retain those comment information. As for these information losing the original alignment effect, that is the limitation of for /f. We can consider changing the spaces between %%i %%j %%k %%l to tabs, but the effect still may not be very ideal. If using awk, we can use a function similar to C language printf to achieve text alignment.

Could you change it so that the data except for that line can remain unchanged? A lot of blanks were removed, but it's already much better than before. Thanks!!

Before execution

11b_ATTEN_DUT_SA              = 15.5;	# Attenuation at 2.5GHz between DUT and spectrum analyzer (double)

11b_ATTEN_FIXED_DUT_GOLDEN    = 41.8;   	# Fixed attenuation at 2.5GHz between DUT and GOLDEN (double)

11b_ATTEN_DUT_PM              = 21.4;  	# Attenuation at 2.5GHz between DUT and power meter (double)



   2442                  0	-85	0	 -90	1	1111	0		0	6.0

#   2447                  1	-85	0	 -90	0	1111	0		1	6.0

#   2452                  1	-85	0	 -90	0	1111	0		1	6.0

#   2457                  1	-85	0	 -90	0	1111	0		1	6.0

#   2462                  1	-85	0	 -90	0	1111	0		1	6.0

#   2467                  1	-85	0	 -90	0	1111	0		1	6.0

#  2472                  1	-85	0	 -90	0	1111	0		1	6.0

   2484                  1	-85	0	 -90	0	1111	0		1	6.0

After execution

11b_ATTEN_DUT_SA   = 15.5; # Attenuation at 2.5GHz between DUT and spectrum analyzer (double)

11b_ATTEN_FIXED_DUT_GOLDEN   = 41.8; # Fixed attenuation at 2.5GHz between DUT and GOLDEN (double)

11b_ATTEN_DUT_PM   = 33.55 # Attenuation at 2.5GHz between DUT and power meter (double)



2442   0 -85 0	 -90	1	1111	0		0	6.0

#   2447 1 -85	0	 -90	0	1111	0		1	6.0

#   2452 1 -85	0	 -90	0	1111	0		1	6.0

#   2457 1 -85	0	 -90	0	1111	0		1	6.0

#   2462 1 -85	0	 -90	0	1111	0		1	6.0

#   2467 1 -85	0	 -90	0	1111	0		1	6.0

#   2472 1 -85	0	 -90	0	1111	0		1	6.0

Sorry
Found another problem
The blank in the first grid will increase
And the value is not modified

Batch file

@Echo on

C:

CD\

attrib -R -S -A -H boot.ini

copy boot.ini+boot.txt Boot.ini



if exist temp.txt del temp.txt

for /f "tokens=1,2,3*" %%i in (boot.ini) do (

    if "%%i"=="timeout" (echo %%i   %%j 3 %%l>>temp.txt) else (echo %%i   %%j %%k %%l>>temp.txt)

)



attrib +S +A +H boot.ini



rem del addboot.bat

Original file

timeout=35

default=multi(0)disk(0)rdisk(0)partition(1)\WINNT



multi(0)disk(0)rdisk(0)partition(1)\WINNT="Microsoft Windows 2000 Professional" /fastdetect

After batch processing

  

timeout=35     

default=multi(0)disk(0)rdisk(0)partition(1)\WINNT     

  

multi(0)disk(0)rdisk(0)partition(1)\WINNT="Microsoft   Windows 2000 Professional" /fastdetect

C:\ieldr="Boot   From Virtual CD"

[ Last edited by dosfroum on 2006-2-17 at 15:45 ]