void printList(numList & L) {
// Print the integers in list L, 5 per line.
for (int i=1; i <= L.size(); i++) {
cout << " " << L.getnum(i) ;
if (!(i%5) ) cout << endl; // Start new line after every 5th one.
}
if (!((i-1)%5)) cout << endl; // End last line if needed.
} // end printList
