Problem2

问题描述
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.


就是求出满足小于4000000,并且是偶数的Fibonacci数的和。

public long Count1(){
long result = 0;
int start1 = 1;
int start2 = 1;
int end = 4000000;

int cur ;
do{
cur = start1 + start2;
if(cur%2==0){
result += cur;
}
start1 = start2;
start2 = cur;
}while(start2<4000000);
return result;
}
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