请问各位大佬该怎么改，sum和n-2都没问题，但是结果不对

#include<iostream>
#include<iomanip>
using namespace std;
int main() {
	int n,i,j,p,sum=0, arr[10005] = { 0 };
	cin >> n;
	for (i = 0; i < n; i++) {
		cin >> arr[i];

	}
	for (i = 0; i < n-1; i++) {
		for (j = 0; j < n - 1 - i; j++) {
			if (arr[j] > arr[j + 1]) {
				p = arr[j+1];
				arr[j + 1] = arr[j];
				arr[j] = p;
			}
		}
	}
	for (i = 1; i < n-1; i++) {
		sum = sum + arr[i];
	}
	cout << fixed << setprecision(2) << double(sum/(n-2)) ;
	return 0;
}