题解 | #求 1 - n 之间偶数的和#
求 1 - n 之间偶数的和
http://www.nowcoder.com/practice/03df7fa0950046a9ba564b4438f918a3
using namespace std;
int main() {
int n;
cin >> n;
int sum = 0;
int i;
for(i=1;i<=n;i++){
if(i%2==0){
sum+=i;
}
}
// write your code here......
cout << sum << endl;
return 0;
}