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 <iostream>
using namespace std;
int main() {
int n;
cin >> n;
int sum = 0;
int p;
int p_1;
for(p = n; p > 0;)
{
sum = sum + p;
p = p - 2;
}
cout << sum << endl;
return 0;
}