HDOJ_Problem Archive_1001_Sum Problem

题目链接:点击打开链接

我的C++代码

#include<iostream>using namespace std;int main(){int n;while (cin>>n)//这里不能用scanf(),会超时{int sum = 0;for (int i = 1; i <= n; i++){sum = sum + i;}printf("%d\n\n", sum);}//system("pause");return 0;}