C :

#include <stdio.h>

int main()
{
	int score[10];
	int i, sum=0;
	for( i=0; i<10; i++ ){
		scanf("%d",&score[i]);
		if( score[i]>=100 )break;
	}
	int max=score[0], min=score[0];
	if( i==10 ){
		for( i=0; i<10; i++ ){
			if( max<score[i] ){
				max = score[i];
			}
			if( min>score[i] ){
				min = score[i];
			}
			sum += score[i];
		}
		sum = sum-min-max;
		float aver = sum/8.0;
		printf("%.1f",aver);
	}else printf("the score is invalid.");
	
	return 0;
}

C++ :

#include<iostream>
using namespace std;
int main(){
    int i,flag1=0,flag2=0;
    float max=0,min=100,sum=0;
    float da[10];
    for (i=0;i<10;i++){

        cin>>da[i];
        if ((da[i]>100)||(da[i]<0)){
            cout<<"the score is invalid.";
            return 1;
        }
    }
    for (i=0;i<10;i++){
        if (da[i]>max){
            max=da[i];
            flag1=i;
        }
        if (da[i]<min){
            min=da[i];
            flag2=i;
        }
    }
    da[flag1]=0,da[flag2]=0;
    for (i=0;i<10;i++){
        sum+=da[i];
    }
    cout<<sum/8<<endl;
    return 0;
}