p02.cpp
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/*
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;
}