pat乙级1070代码有测试点过不了，求教

Question

#include
#include
#include
using namespace std;
int main()
{
int a[10004];
int n;
cin>>n;
for(int i=0;i cin>>a[i];
sort(a,a+n);
float sum=0;
for(int i=1;i<n;i++)
{
if(i==1)
sum=(a[i-1]+a[i])/2.0;
else
sum=(sum+a[i])/2;
}
printf("%.0f\n",sum);
return 0;
}

Answer 1

http://blog.csdn.net/leonardo1897/article/details/48803665