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What is the safe way to fill multidimensional array using std::fill?

Asked 2010-10-16T09:14:35.000
21

Here is what I am using:

class something
{
   char flags[26][80];
} a;

std::fill(&a.flags[0][0], &a.flags[0][0] + 26 * 80, 0);

(Update: I should have made it clear earlier that I am using this inside a class.)

c++ arrays algorithm multidimensional-array fill
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it is safe, a two-dimensional array is an array of arrays. Since an array occupied contiguous storage, so the whole multidimensional thing will too. So yeah, it's OK, safe and portable. Assuming you are NOT asking about style, which is covered by other answers (since you're using flags, I strongly recommend std::vector<std::bitset<80> > myFlags(26))

answered 2010-10-16T09:17:24.633

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