C :

#include <stdio.h>
struct student {
    int num;
    char name[20];
    int score[3];
}stud[10];
void main() {
    int i, j, best;
    float sum, tot[3], aveg[3], aveg_score[10];
    for (i = 0;i < 3;i++)
        tot[i] = 0;
    for (i = 0;i < 10;i++) {
        scanf("%d %s", &stud[i].num, stud[i].name);
        sum = 0;
        for (j = 0;j < 3;j++) {
            scanf("%d", &stud[i].score[j]);
            tot[j] += stud[i].score[j];
            sum += stud[i].score[j];
        }
        aveg_score[i] = sum / 3;
    }
    for (i = 0;i < 3;i++) {
        aveg[i] = tot[i] / 10;
        printf("%.2f ", aveg[i]);
    }
    printf("\n");
    best = 0;
    for (i = 1;i < 10;i++)
        if (aveg_score[i] > aveg_score[best])
            best = i;
    printf("%d %s", stud[best].num, stud[best].name);
    for (i = 0;i < 3;i++)
        printf(" %d", stud[best].score[i]);
    printf("\n");
}

C++ :

#include<iostream>
#include<algorithm>
#include<numeric>
using namespace std;

struct Student
{
	int num;
	char name[3];
	int a;
	int b;
	int c;
	float ave;
}student[10];

int main()
{
	int i,k;
	int a=0,b=0,c=0;
	float g=0;
	for(i=0;i<10;i++)
	{
		scanf("%d%s%d%d%d",&student[i].num,&student[i].name,&student[i].a,&student[i].b,&student[i].c);
		student[i].ave=(student[i].a+student[i].b+student[i].c)*1.0/3;
		a+=student[i].a;b+=student[i].b;c+=student[i].c;
	}
	printf("%.2f %.2f %.2f \n",a*1.0/10,b*1.0/10,c*1.0/10);
	for(i=0;i<10;i++)
	{
		if(g<student[i].ave) {g=student[i].ave;k=i;}

	}
	printf("%d %s %d %d %d\n",student[k].num,student[k].name,student[k].a,student[k].b,student[k].c);
	return 0;
}

Java :

import java.text.DecimalFormat;
import java.util.Arrays;
import java.util.Scanner;

public class Main {
   private static Scanner s = new Scanner(System.in) ;
   private static DecimalFormat df = new DecimalFormat("0.00") ;
   public static void main(String[] args) {
	  B b[] = new B[10] ;
	  
	  for (int i = 0; i < b.length; i++) {
		  b[i] = new B() ;
		  
		  b[i].num = s.nextInt() ;
		  b[i].name = s.next() ;
		  b[i].s1 = s.nextInt() ;
	      b[i].s2 = s.nextInt() ;
		  b[i].s3 = s.nextInt() ;
	  }
	  double sum1 = 0 ;
	  double sum2 = 0 ;
	  double sum3 = 0 ;
	  for (int i = 0; i < b.length; i++) {
		 sum1 = sum1 + b[i].s1 ;
		 sum2 = sum2 + b[i].s2 ;
		 sum3 = sum3 + b[i].s3 ;
	  }
	  
	  System.out.println(df.format(sum1/b.length)+" "+df.format(sum2/b.length)+" "+df.format(sum3/b.length)+" ");
	  Arrays.sort(b);
	  
	  System.out.println(b[b.length-1].num+" "+b[b.length-1].name+" "+b[b.length-1].s1+" "
			  +b[b.length-1].s2+" "+b[b.length-1].s3);
   }
   
}

class B implements Comparable{
	int num ;
	String name ;
	int s1 ;
	int s2 ;
	int s3 ;
	
	double a(){
		return ((double)(s1+s2+s3))/3 ;
	}

	@Override
	public int compareTo(Object o) {
		// TODO Auto-generated method stub
		B b = (B) o ;
		if(this.a()>b.a())return 1 ;
		else if(this.a()==b.a())
		return 0;
		else return -1 ;
	}
}