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Ok, I get numbers with wc and stty. How do I use it as variables for formula?

It's part of my program. Still missing centering by the screen. Is it ok so far?


#!/bin/sh

echo "What is the file name:"

read FILE

echo "Set X"

read X

echo "Set Y"

read Y
...

Thank you, I'll try this :)

Hello, people,

1. The problem statement, all variables and given/known data:

I have to make a tool that is centering the given text by the screen width or given parameter.

I have no idea...

Yes, it is homework.

Hello, people,

I have to make a tool that is centering the given text by the screen width or given parameter.

I have no idea how to write this script. Can anyone make it for me ir at least...