Sum Problem

Sum Problem

**Time Limit : 1000/500ms (Java/Other) Memory Limit : 65536/32768K (Java/Other)
Total Submission(s) : 50 Accepted Submission(s) : 20
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

**

#include<stdio.h>
int main(int argc, const char* argv[])
{
	int sum,num=0;
	while (scanf("%d", &num) != EOF)
	{
		sum = 0;
		for (int i = 1; i <= num; i++)
			sum += i;
		printf("%d\n\n", sum);
	}
	return 0;
}

The author is so lazy that he doesn’t leave anything