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Thats how i would do it and just label the columns before the loop so the user knew what number was what.

i guess it depend on your overall goal. You could just printf evertime you find an equivalent number inside the find_same() function. Or if you wanted to save it as data to acess later you could...

it looks like it would only print the last number that was the same and not all numbers that are the same. Is that what you wanted?