2. Calculate an average of 20 numbers using array

#include <stdio.h>

int main()
{
    int n, i, j, k, temp, sum;
    n = 10;
    sum = 0;
    int arr[n];
    printf("Enter the %d numbers : ", n);
    for(i = 0; i < n; i++)
        scanf("%d", &arr[i]);

    for(i = 0; i < n; i++)
        sum += arr[i];

    printf("\nThe average of those numbers : %f\n", (float)sum/n);
    return 0;
}