C :

#include<stdio.h>
int main()
{
	int i;
	double sum,a[12];
	for(i=0;i<10;i++)
	{
		scanf("%lf",&a[i]);
	}
	for(sum=0,i=0;i<10;i++)
	{
		sum+=a[i];
	}
	printf("%.2lf\n",sum/10);
	return 0;
}

C++ :

#include <stdio.h>
int main() {
	float average(float array[10]);
	float score[10];
	int i;
	for (i = 0;i < 10;i++)
		scanf("%f", &score[i]);
	printf("%.2f\n", average(score));
	return 0;
}
float average(float array[10]) {
	int i;
	float aver, sum = array[0];
	for(i = 1;i < 10;i++)
		sum = sum + array[i];
	aver = sum / 10;
	return aver;
}

Pascal :

var
  i:longint;
  m,s:double;
begin
  for i:=1 to 10 do
  begin
    read(m);
    s:=s+m;
  end;
  writeln(s/10:0:2);
end.

Java :

import java.util.*;

public class Main{ 
	public static void main(String[] args){
		Scanner in =new Scanner(System.in);
		double s=0;
		for(int i=1;i<=10;i++)
			s +=in.nextDouble();
		System.out.printf ("%.2f\n",s/10);
	}
}

Python :

print '%.2f' % (sum([float(i) for i in raw_input().split()])/10)