/*
Even Fibonacci numbers
Problem 2
Each new term in the Fibonacci sequence is generated by adding the previous two terms. By starting with 1 and 2, the first 10 terms will be:

1, 2, 3, 5, 8, 13, 21, 34, 55, 89, ...

By considering the terms in the Fibonacci sequence whose values do not exceed four million, find the sum of the even-valued terms.

by:dbk

*/

#include <stdio.h>

#define LIMITE 4000000

int main()
{

	int i;
	unsigned int a = 1;
	unsigned int b = 1;
	unsigned int res = 0;
	unsigned int tmp = 0;

	do
	{

		tmp = a;
		a = b;
		b += tmp;

		if (b % 2 == 0) res += b;

	}while(b < LIMITE);

	printf("\nResultado final: %ld\n", res);

	return 0;
}