How do you reverse an integer value (e.g. 1234 = 4321)

Question

How do you reverse an integer value (e.g. 1234 => 4321)

Sigiloso · Accepted Answer

can be done with one loop, and modular arithmetic

saroch · Answer

I came up with a quicky but it has a problem, if the number ends with a "0", it wont print in the reversed number, will resort to some ugly hack thing for that.

int reverseInt(int num)
{
	int res = 0;
	do
	{
		res *= 10;
		res += (num % 10);
		num /= 10;
	} while (num > 0);

	return res;
}

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