Shell Programming and Scripting

Hello,

I have two data (.txt) files which I need to do some operations on them simultaneously. for example:

file1:
word11 word12 word13
word21 word 22 word 23
word31 word32 word33

file2:
word11 word12 word13
word21 word 22 word 23
word31 word32 word33

I need to see if each word in the first column in the first file exists in the second column in the second file. This is not the problem, the problem is to receive both of the files to the same script. Is it possible?

I thought about two options, but none of them worked;

first option:
I wrote a main script and pipelined the first file to a secondary script (let's call it scr1), and pipelined the other file to another secondary script (let's call it scr2). In scr1 I moved the word I needed into a var, and in scr2 I did the same thing to the word I needed in the second file. The problem is that now I can't compare between these two vars, because they're in different scripts. Is there a way to do that?

second option:
I wrote a main script and pipelined the two files to a secondary script, but I can't do
set line1 = ($<)
set line2 = ($<)
(obviously)
and also, it joins both of the files together so I can't refer to both of them, because it's one file now.

Is there another way to do this? And was the beginning of one of my ways somehow correct?

I have to use C-Shell and I can't use sed and awk.

Thank you so much if you're able to help me.
Shira.

Why not? Is this a homework assignment?
Homework questions are not allowed, please read our rules.

Regards

I'm using c-shell since I have background in ansi c and it's easier to comprehend, that's it.

You'll find scripting much easier with a POSIX shell, and you'll find far more people ready to help, and much more documentation online and in print.

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Thank you for your response!
The thing is that I've almost finished my script, I just have this problem which I cannot overcome. If there's anyone who is able to help, I would really appreciate it.

Perhaps you have run up against one of the deficiencies of csh?

If it's not homework, why can't you use sed or awk?

When you want to study a language to its depth, you have to have strong basic skills and then you can use the shortcuts. Like when I studied ansi c, I didn't use all the <string.h> functions, I wrote them by myself.
And as you can see, I cannot solve this particular problem, so I have to learn this in order to progress.
Also, cshell is a basic script language. I will move on to more advanced languages when I feel I have enough knowledge.