欧拉计划problem

JAVA：

package exercise;
public class _偶斐波那契数 {

	public static void main(String[] args) {
		int[] a = new int[500];
		int sum = 0;
		int var = 0;
		a[0]=1;
		a[1]=2;
		for(int i=0;a[i]<4000000;i++) {
			var = a[i]+a[i+1];
			a[i+2] = var;
			//System.out.println(a[i]);
			if(a[i]%2==0) {
				sum+=a[i];
			}
		}
		System.out.println(sum);
	}

}

C#：

#include
//13195 = 5 * 7 * 13 *29
int main(){
    long long num = 600851475143L;
    int max = 0;
    for(long long i = 2;i<=num ; i++){
        if(num%i==0){
            num /= i;
            if(max < i) max = i;
        }
    }
    printf("%d",max);
}

结果：6857