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Revision: 30177
at August 9, 2010 18:05 by kentoy


Initial Code
/* 
 * PROJECT EULER PROBLEM 1
 * If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9.
 * The sum of these multiples is 23.
 * Find the sum of all the multiples of 3 or 5 below 1000.
 * ans: 233168
 */

public class Euler.Problem1
{
	private const int ceiling = 1000;

	public Problem1() {
	}

	private int sum_divisible_by(int factor) {
		int s = 0;
		s = (factor * (((ceiling - 1) / factor) * (((ceiling - 1) / factor) + 1) * 1/2));
		return(s);
	}

	private void collect_sum() {
		int v = 0;
		v = sum_divisible_by(3) + sum_divisible_by(5) - sum_divisible_by(15);
		stdout.printf("sum = %d\n".printf(v));
	}

	public static int main(string[] args) {
		Euler.Problem1 p = new Euler.Problem1();
			p.collect_sum();
		return(0);
	}
}

Initial URL


Initial Description
<ol><li>save: pep1.vala</li><li>compile: valac pep1.vala -o pep1</li><li>execute ./pep1</li></ol>

Initial Title
Vala [Euler Project] - Problem 1

Initial Tags


Initial Language
Other