# Problem #2

This is problem 2 from project Euler. The task is to find the sum of all the even numbers which make up the Fibonacci sequence that starts with 1 and is less than 4 million.

```/*
* challenge2.cpp
*
* This is challenge 2 of project Euler. The objective is to find the sum of the even numbers that lie within
* the fibonacci sequence calculated up to 4,000,000.
*
* Copyright 2012 Bill Heaster <TheCreator@ApexLogic.net>
*
* This program is free software; you can redistribute it and/or modify
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*
*
*/

#include <iostream>

using namespace std;

int main(int argc, char **argv)
{

//make array, fill with fibonici sequence

int myArray ;

int a =1;
int b = 2;
int c = 0;

int cnt = 2;

int temp, res;

//add the beginning to the array
myArray = a;
myArray = b;

while(c < 4000000)
{
c = a + b;
temp = c;
if(temp % 2 == 0) //if it is even
{
myArray[cnt++] = c;
}
a = b;
b = c;
}

int i;
res = 0;
for(i = 0; i<cnt; i++)
{
res+=myArray[i];
}

cout<<"the sum of the even numbers within the fibonacci sequence, up to 4 million is: "<<res<<endl;

return 0;
}

```