Recursion : Minimum value index of Array

/*
 * <summary> Determines the index of the smallet element </summary>
 * <params>
 *      "arr" = Array containing the integer elements
 *      "size" = Size of "arr"
 *      "currentIndex" = Index position of the current element
 * </params>
 * <return> Index of the first occuring minimum value </return>
 * <precond>
 *  "size" > 0
 *  Function should have an intial call with "0" as the currentIndex
 * </precond>
 */

 int get_min_index(int arr[], int size, int currentIndex)
 {
    int minIndex;

    /* Base Case - Last Element */
    if(currentIndex == size - 1)
        return currentIndex;

    minIndex = get_min_index(arr, size, currentIndex + 1);

    return (arr[currentIndex] <= arr[minIndex]) ? currentIndex : minIndex;
 }