find the sum of the even-valued terms

helloworld365

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.

public class FibonacciSequence {public static void main(String args[]){int sum = 0;int a = 1;int b = 2;int c = 3;/** * 求偶数之和 * 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, ... * a, b, c *    a, b, c *       a, b, c *          a, b, c * */while (b < 4000000){sum += b;a = b + c;b = a + c;c = a + b;}System.out.println(sum);}}