Weird error in for loop

[QWERTYman]

I tried a very simple projecteuler.com problem (the first one, in fact), that went like so:

Find the sum of all multiples of 3 and 5 up to 1,000.

I wrote this brief program to try to do this, as follows:

#include <iostream>

int main()
{
    int sum = 0;
    for (int i = 0; i < 1000; i++)
    {
        if(sum % 3 == 0 || sum % 5 == 0)
        sum += i;
    }
    std::cout << sum;
    std::cin.ignore(std::numeric_limits<std::streamsize>::max(), '\n');
}

However, my output at this stage is just 1.

I've looked this whole thing over and can't find the error. Any ideas?

[m4ster r0shi]

I believe what you mean here:
if(sum % 3 == 0 || sum % 5 == 0)

is:
if(i % 3 == 0 || i % 5 == 0)

:P

[QWERTYman]

LAWL. Epic fail.

Thanks, mate. Gave me the right answer.