/*
  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("
  Resultado final: %ld
  ", res);
  
  	return 0;
  }