Steve Summit C notes , exercise

this is the programme i created, for exercise 2, assignment 3 at

http://www.eskimo.com/~scs/cclass/asgn.beg/PS2.html

it runs fine. i wanted to know if it needs any improvement:

----------------- PROGRAMME ----------------------------
/* Steve Summit's C programming

Section 3 :: exercise 2

STATEMENT:
Write a program to compute the average of the ten numbers 1, 4,
9, ..., 81, 100,
that is, the average of the squares of the numbers from 1 to 10. (This
will be a
simple modification of Exercise 3 from last week: instead of printing
each square
as it is computed, add it in to a variable sum which keeps track of
the sum of all
the squares, and then at the end, divide the sum variable by the
number of numbers summed.)

*/

#include <stdio.h>

#define DIVISOR 10

int main()
{
int i;
double sum;

sum = 0;
for(i = 0; i <= 10; ++i)
sum += i*i;

printf("the average is: %.1f\n", sum / DIVISOR);

return 0;

}

----------------------- OUTPUT ----------------------
[arch@voodo steve-summit]$ gcc -std=c99 -pedantic -Wall -Wextra
assign-3_ex-2.c
[arch@voodo steve-summit]$ ./a.out
the average is: 38.5
[arch@voodo steve-summit]$

.

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