Recursively find the largest number in an integer array

I am required to find the largest number in an integer array recursively. My function crashed but I cannot find the bug. Here's my c++ code:

void Numbers::compare(int size)
{
if(size == 0)
    cout << "You must enter an number!" << endl;

if(size ==1)
    cout << "The max number is " <<  numArray[0] << endl;

if(size >1)
{
    if(numArray[size-1] > numArray[size-2])
    {
        int temp = 0;
        numArray[size-1] = temp;
        temp = numArray[size-2];
        numArray[size-2]= numArray[size-1];
        size --;

    }
  size = size -1 ;
  compare(size);

}


}