working on an ptr program for class

[Deadlleg]

I've gotten an error that I'm not sure how to fix.
lnk2019 unresolved external symbol void__cdecl.

these are the two areas the error talks about

  int main()
{
    int avg;
    int size;
    int mode;
    double average;
    double mean;
    const int POSSIBLE_NUMBERS = 999;
   
    cout << "Please enter how big you want the array\n";
    cin >> size;
    int *arrayPtr = new int[size];

    for (int count = 0; count < size; count++)
    {
            arrayPtr[count] = (rand() % POSSIBLE_NUMBERS);
    }
   
    average = getAverage(arrayPtr, size);
    cout << "The average is " << average << endl;

    arrSelectionSort(arrayPtr, size);

   


    return 0;
}


void arrSelectionSort(int *arr[], int size)
{
    int startScan, minIndex;
    int *minElem;
    const int ONE = 1;
    const int ZERO = 0;

    for (startScan = ZERO; startScan < (size - ONE); startScan++)
    {
        minIndex = startScan;
        minElem = arr[startScan];
        for (int index = startScan + ONE; index < size; index++)
        {
            if (*(arr[index]) < *minElem)
            {
                minElem = arr[index];
                minIndex = index;
            }
        }
        arr[minIndex] = arr[startScan];
        arr[startScan] = minElem;
    }
}