Question

这个程序在杭电1001里面怎么总是说Presentation Error 呢？

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

Answer 1

Output
For each case, output SUM(n) in one line, followed by a blank line.

每一个输出的数值后面，要跟一个空行，所以你输出的格式不对，修改很简单

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