Memory & arrays - Smallest to Largest

#include <iostream>

using namespace std;
int smallestIndex( int[], int);  // function prototype

void main()
{ 
    int arr[9];
    int position;
		// Get information for the array.
	cout << "Please enter 10 numbers for this array: ";
	cin >> arr[0];
	cin >> arr[1];
	cin >> arr[2];
	cin >> arr[3];
	cin >> arr[4];
	cin >> arr[5];
	cin >> arr[6];
	cin >> arr[7];
	cin >> arr[8];
	cin >> arr[9];

    position = smallestIndex(arr, 9);

	
}

 int smallestIndex( int arr[], int size)
{
    int smallestIndex=0;
    int temp=arr[0];
	int i;

    for(i=0; i<size; i++)
    {
       if(arr[i]<temp)
       {
           smallestIndex = i;
                   temp=arr[i];
        }
     }
   return smallestIndex;
 }