Oh man, super rookie mistake there- thanks for catching that. However, even when corrected, it prints:
A from FILE1 with number 1_1 and A from FILE2 with number 2_1 match
A from FILE1 with number 1_2 and B from FILE2 with number 2_2 DO NOT match
B from FILE1 with number 1_3 and from FILE2 with number DO NOT match
C from FILE1 with number 1_4 and from FILE2 with number DO NOT match

and is still is missing two of the matches and two of the mismatches, so that's in the looping.

In reply to Re^4: Simple comparison of 2 files by Q.and
in thread Simple comparison of 2 files by Q.and

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