题解 | #求 1 - n 之间偶数的和#
求 1 - n 之间偶数的和
https://www.nowcoder.com/practice/03df7fa0950046a9ba564b4438f918a3
#include <array>
#include <iostream>
#include <vector>
using namespace std;
int main() {
int n;
cin >> n;
int sum = 0;
vector<int> arr;
// write your code here......
for (int i = 1; i<100000; i++){
if (i<= n && i%2 == 0){sum += i;}
if (i>n){break;}
}
cout << sum << endl;
return 0;
}