Problem 1: natural number

At dreamincode.net/forums/ I found a thread regarding a list of sites that can help in learning C++, or programming at general. One of them is projecteuler.net. Interesting, as I have hard time since the first problem. I like solving problem especially when it is challenging. :)


/*
If we list all the natural number below 10 that are multiples of 3 or 5, we get 3,5,6, and 9.
The sum of these multiples is 23. find below 1000.
*/
#include <iostream>
#include <conio.h>
using namespace std;

int main()
{
    int number, sum, max=1000;
    for (number=0,sum=0;number<max;number++)
    {
    if (((number%3)==0)||((number%5)==0))
       sum+=number;
       cout << number <<'+';
    }
    cout << endl;
    cout <<"The sum of natural number below "<< max <<" is:" << sum;
    getch();
}