Shell Programming and Scripting

Hi Everyone,
I am new to this forum and new to sed/awk programming too !!
I need to find particular string in file1(text file) and replace it with a value from another text file(file2) the file2 has only one line and the value to be replaced with is in the second column.

file 1:
(assert (= c OUT))

file 2:
OUT 0


NOW, I HAVE TO REPLACE 'OUT' WITH THE VALUE 0.
please pleeaseee tell me how to do this using sed/awk or any other way!!! am in distress!! HELP

Code:

 
key=$(awk '{print $1}' file2)
value=$(awk '{print $2}' file2)
sed -i "s/$key/$value/g" file1

maybe something like this ?

Code:

while read a b
do
    sed "s/$a/$b/g" file1 >output
    cat output >file1
done <file2

or

Code:

while read a b
do
    sed -i "s/$a/$b/g" file1
done <file2

Guys thanx for replying!!
But will these solve my problem? since where exactly are we searching the string 'OUT' here? I actually have similar other strings to search and replace with other values from other files.. actually this is the case:

file 1:

(define argc :: int)
(assert (> argc 1))
(assert (= argc ARG))
<check>

(define argc :: float)
(assert (> c 0))
(assert (= c OUT))
<check>

.
.
.

file2:
main 1


file 3:
main 0
.
.
.
Now, I have to find the string 'ARG' from file 1 and replace it with the value '1' from file 2. And, find 'OUT' and replace it with the value '0' from file 3.

Now can you put some more light on it?

If you have too many files like file2, file3,....file50
Then all above files can be concatenated into one say a temp file..
then use temp file and change values in file1.
Then go with ctsgnb in post #3

I had a file which had all this data... I had separated it only :P
actually the data in file 2, 3, 4 etc are divided into 2 files... i have to merge them. okay i will see this and get back to you. thanx a ton!! )

---------- Post updated at 11:50 PM ---------- Previous update was at 11:48 PM ----------

does the link u gave show how to concatenate files into a single?

---------- Post updated 12-17-10 at 12:06 AM ---------- Previous update was 12-16-10 at 11:50 PM ----------

ques---->
does a and b signify the strings i want to find?

In

Code:

 
while read a b

a is first string (i.e. OUT) and b is 2nd string (i.e. 0)
and in

Code:

 
sed -i "s/$a/$b/g" file1

$a will be replaced by $b

If you don't have file2, file3, ..., file50 concatenate into one already then you need few lines of script to do that 1st. If you are facing problem in this, pls tell all such files and there names (name format)