private static void MaxTest()
{
Console.WriteLine("This section is to test the MAX HEAP class.\n");
string sort_error = "The current value is not less than the next value on the array.";
string pop_error = "The current value is not grater than the next value on the array";
string invariant_error = "The invariants have been broken.";
MaxHeap<int> myHeap = new MaxHeap<int>();
int[] numberList = new int[] { 2, 5, 9, 2, 8, 1, 4, 7, 3, 6 };
Console.WriteLine("Adding the following numbers to the heap: [{0}]\n",
string.Join(", ", numberList));
foreach (int number in numberList)
myHeap.Add(number);
Console.WriteLine("New Heap: [{0}]\n", string.Join(", ", myHeap));
Console.WriteLine("Performing Heap Sort...\n");
myHeap.Sort();
TestMaxSort(myHeap, sort_error);
Console.WriteLine("New Heap: [{0}]\n", string.Join(", ", myHeap));
Console.WriteLine("Rebuilding Heap...\n");
myHeap.BuildHeap();
Console.WriteLine("New Heap: [{0}]\n", string.Join(", ", myHeap));
Console.WriteLine("Poping the top value until heap is empty...\n");
TestMaxPop(myHeap, pop_error);
int elements = 20000;
myHeap = new MaxHeap<int>(elements);
int[] random_list = RandomIntArray(elements);
Console.WriteLine("Adding {0} values to a new heap and verifying the invariants...\n", elements);
Console.WriteLine("This part will take a while...\n");
foreach (int number in random_list)
{
myHeap.Add(number);
TestMaxInvariant(myHeap, invariant_error);
}
Console.WriteLine("Heap too big to print on console, current elements in heap: {0}\n", myHeap.Count);
Console.WriteLine("Going to pop half of the values out of the heap and verifying the invariants...\n");
Console.WriteLine("Again... This part will take a while...\n");
for (int i = 0; i < elements / 2; i++)
{
myHeap.PopMax();
TestMaxInvariant(myHeap, invariant_error);
}
Console.WriteLine("Heap too big to print on console, current elements in heap: {0}\n", myHeap.Count);
Console.WriteLine("----------------------------------------------------");
}
public static void Sort(int[] arr)
{
int n = arr.Length;
IHeap maxHeap = new MaxHeap(n);
maxHeap.BuildHeap(arr);
for (int i = n - 1; i > 0; i--)
{
Util.Swap(arr, 0, i);
maxHeap.Heapify(arr, 0, i);
}
}
private static void Main()
{
var array = Enumerable.Range(1, 12).ToArray();
var maxHeap = new MaxHeap <int>(array, 20);
maxHeap.BuildHeap();
maxHeap.Print();
Console.ReadLine();
Console.Clear();
maxHeap.RemoveMax();
maxHeap.Print();
Console.ReadLine();
Console.Clear();
maxHeap.Remove(3);
maxHeap.Insert(6);
Console.WriteLine("Size : " + maxHeap.Size);
maxHeap.Print();
Console.ReadLine();
array = Enumerable.Range(1, 5).ToArray();
var minHeap = new MinHeap <int>(array, 20);
minHeap.BuildHeap();
minHeap.Print();
Console.ReadLine();
Console.Clear();
minHeap.RemoveMin();
minHeap.Print();
Console.ReadLine();
Console.Clear();
minHeap.Remove(3);
minHeap.Insert(6);
Console.WriteLine("Size : " + minHeap.Size);
minHeap.Print();
Console.ReadLine();
}
private static void TestMaxInvariant(MaxHeap<int> heap, string error)
{
if (heap.Count % 500 == 0)
Console.WriteLine("Cycle {0}\n", heap.Count);
heap.Sort();
for (int index = 0; index < heap.Count - 1; index++)
{
Debug.Assert(heap[index] <= heap[index + 1], error);
}
heap.BuildHeap();
}