Efficient way to get the least non-negative residue modulo n in C?
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Published on 2010-04-25T16:05:39Z
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Hi,
Is there an efficient way to get the least non-negative residue modulo n, where n is positive, in C?
This is quite easy if the number is non-negative, then it's just a % n (where a is the non-negative integer).
However when a is negative, it appears the behaviour, in C89, is undefined. I.e. -2 % 11 = -2 or 9.
Thanks.
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