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
#include using namespace std;
int main() {
int n;
cin >> n;
int sum = 0;
if(n >=1 && n <= 1000){
for(int i = 1; i <= n; i++){
if( i % 2 == 0){
sum += i;
}
}
}
cout << sum << endl;
return 0;
}
