hdu1001 Sum Problem(C语言)

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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
1100
 

Sample Output
15050
 

Author
DOOM III



C语言AC代码
#include<stdio.h>
int main()
{
int n,i,sum=0;
while(scanf("%d",&n)!=EOF)
{
for(i=1;i<=n;i++)
sum=sum+i;
printf("%d\n\n",sum);
sum=0;
}
return 0;
}