How to use sed to increase number in file?

[Madz]

I have a file with four numbers that I want to increase every time I run a script.

How to increase the correct number and write it on correct row? (I have the correct number in an variable)

The "number file" could for example look like this:
row1
100 <- should increase by one the next time I run the cript
row2
355 <- &quot;&quot;
row3
400 <- &quot;&quot;



Thanks in advance!
/mats

 

[fcail]

Hi,
you can try this awk script :

BEGIN{i=0}
$0 ~ /[0-9]/ { tab=$0+1}
$0 !~ /[0-9]/ {tab=$0}{i++ }
END{for(j=0;j<i+1;j++) print tab[j] >FILENAME}

make a file which contains this script, then execute

awk -f yourfile.awk filetomodify

if think there is an easy way to do, but this one work, so...

Fcail

 

[Madz]

I am not so familiar with awk. Is 'yourfile.awk' the script file from above?

I got an error that says; Cannot make assignment to tab.It is an array name.

I saved the script from above to: aa.awk
$awk -f aa.awk nrfile
nrfile = the file that contains the numbers I want to increase

How to manage this?


Thanks for your support!

/mats