Hey again. Just wanted to thank the forum for being so helpful last time I was here. :) Helped save me from a lot of headaches, hehe.

I have a file that has a line somewhere in it that reads:

int SEED = 12345;

How would I use sed to find that instance in the file, and change the file that once, so something like

./CHANGE_SEED 21
would change that line in the file to
int SEED = 21;
and ./CHANGE_SEED 12345
would change it back.

Thanks in advance for all the help. :)

--Natnit

Your file name with:
int SEED = ...;
is input.txt

In CHANGE_SEED file:

#!/bin/ksh
sed "s/int SEED = [0-9]*;/int SEED = $1;/" input.txt

Run it:
$ ./CHANGE_SEED 12345

Luke Chi