Shell Programming and Scripting

Dear all,
I need your help with some shell scripting which I have just started. I have a file whose content look something like:

Pressure 1 1 1e5
Temperature 1 1 300
Volume 1 1 2e-20

And there are other lines too, but these are the lines i wish to play with. These files are kept in different folders and I wish to change say temperature in each of these folders in systematic fashion say a step of 5. The columns with numbers 1 1 need not change.

sed command is not useful here because 300 is just an example. Temperature may not be 300 in each file. I need a way to do this using shell script. What I do currently is to use vim and change these values every time. But its very cumbersome. Is there a way to change a particular number(in this case 300) from a line containing a particular word(in this case Temperature) without altering other contents of line?

Code:

awk '/Temperature/{$NF=$temp}1' file

Please give more clue about the name and the PATH of the files containing such kind of data
Then we may help to automate making change in it.

---------- Post updated at 07:13 PM ---------- Previous update was at 07:11 PM ----------

Code:

nawk -v STEP="$1" '/Temperature/{$NF+=STEP}1' infile

Code:

# cat tst
Pressure 1 1 1e5
Temperature 1 1 300
Volume 1 1 2e-20

Code:

# nawk -v STEP="-5" '/Temperature/{$NF+=STEP}1' tst
Pressure 1 1 1e5
Temperature 1 1 295
Volume 1 1 2e-20

Name of the file is Input
I have directories named 190,195,...300
Each one has one Input file in which one of the line is Temperature
I want to replace random value of Temperature in each of those Input files by its directory name.

---------- Post updated at 11:52 PM ---------- Previous update was at 11:44 PM ----------

I am sorry, I should have mentioned this before. The problem here with awk is that it doesn't write the modified line in the file. I want the line in file to be changed.

Should the directory name have the same value than the temperature ?

Yes it should have same value.

See if this code can help you out

Code:

 find ./ -type d -maxdepth 1|sed 's|./||'|while read line
do
cd $line
sed -i -r "/Temperature/s/(.*1) (.*)/\1 $line/" *
cd ..
done