Created
April 9, 2018 18:32
-
-
Save kylethedeveloper/a6f2955abcf62caa05db74bcec545864 to your computer and use it in GitHub Desktop.
Project Euler - Problem 2 - Even Fibonacci numbers
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
/* | |
Project_2.cpp : Even Fibonacci numbers | |
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. | |
*/ | |
#include <iostream> | |
using namespace std; | |
int main() | |
{ | |
int a = 0, b = 1, c = 0; | |
unsigned int sum = 0; | |
while (c < 4000000) // as values do not exceed four million | |
{ | |
c = a + b; // sum of last two terms | |
a = b; // 2nd previous | |
b = c; // 1st previous | |
if (c % 2 == 0) // check for even | |
{ | |
sum += c; // sum of evens | |
} | |
} | |
cout << "Last term of Fibonacci: " << c << endl; | |
cout << "Sum of even numbers: " << sum << endl; | |
return 0; | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment