大佬求求 没看懂哪里错了

#include <stdio.h>

int main() {
    double a[100],b[100],average,x=0,sum=0;
    int n;
    scanf("%d",&n);
    for(int i=0;i<n;i++){
        scanf("%lf",&a[i]);
        sum+=a[i];
    }
    for(int i=0;i<n-1;i++){
        for(int j=0;j<n-i;j++){
            if(a[i]>a[i+1]){
                double t=a[i];
                a[i]=a[i+1];
                a[i+1]=t;
            }
        }
    }
    average=(sum-a[0]-a[n-1])/(n-2);
    for(int i=0;i<n;i++){
        b[i]=a[i]-average;
        if(a[i]>average){
            b[i]=a[i]-average;
        }else{
            b[i]=average-a[i];
        }
        if(b[i]>x){
            x=b[i];
        }
    }
    printf("%.2lf %.2lf",average,x);    
    return 0;
}