航电oj 1001 题目及答案

杭州电子科技大学 online judge
1001

Problem Description
Hey, welcome to HDOJ(Hangzhou Dianzi University Online Judge).

In this problem, your task is to calculate SUM(n) = 1 + 2 + 3 + … + n.

Input
The input will consist of a series of integers n, one integer per line.

Output
For each case, output SUM(n) in one line, followed by a blank line. You may assume the result will be in the range of 32-bit signed integer.

Sample Input
1
100

Sample Output
1

5050

以下是我写的程序
语言 c

#include<stdio.h>
main()
{
    long int i, j, sum;
    while (scanf_s("%d", &j) != EOF)
    {
         sum =