static List <int> GenerateNumbers(int count, int maxval = int.MaxValue, int randomtype = 1)
{
Console.WriteLine("Algoritmy budu triedit " + count + " cisel v rozsahu 0.." + maxval);
if (randomtype == 1) // random
{
return(GenerateRandomNumbers(count, maxval));
}
else // almost (reverse)sorted
{
List <int> numbers = GenerateRandomNumbers(count, maxval);
numbers.Sort();
//randomly exchange 1% of numbers
for (int i = 0; i < count / 100; i++)
{
Random rand = new Random();
int index1 = rand.Next(count - 1);
int index2 = rand.Next(count - 1);
Sorts.Swap(numbers, index1, index2);
}
if (randomtype == 3) // reverse sorted
{
numbers.Reverse();
}
return(numbers);
}
}
// recursive
public static List <int> QuickSort(List <int> numbers, int switchlimit = 10)
{
if (numbers.Count <= switchlimit)
{
//return Sorts.BubbleSort(numbers);
return(Sorts.InsertionSort(numbers));
}
// choice of pivotIndex
int tmpMidIndex = numbers.Count / 2;
int tmpFirstIndex = 1;
int tmpLastIndex = numbers.Count - 1;
int pivot;
int a = numbers[tmpMidIndex];
int b = numbers[tmpFirstIndex];
int c = numbers[tmpLastIndex];
pivot = getMedian(a, b, c);
List <int> M = new List <int>();
List <int> P = new List <int>();
List <int> V = new List <int>();
List <int> ret = new List <int>();
for (int i = 0; i < numbers.Count; i++)
{
if (numbers[i] < pivot)
{
M.Add(numbers[i]);
}
else if (numbers[i] == pivot)
{
P.Add(numbers[i]);
}
else if (numbers[i] >= pivot)
{
V.Add(numbers[i]);
}
}
M = QuickSort(M, switchlimit);
V = QuickSort(V, switchlimit);
ret.AddRange(M);
ret.AddRange(P);
ret.AddRange(V);
return(ret);
}
public static List <int> MergeSort(List <int> numbers, int switchlimit = 5)
{
//if (numbers.Count <= 1)
//{
// return numbers;
//}
if (numbers.Count <= switchlimit)
{
return(Sorts.BubbleSort(numbers));
}
List <int> ret = new List <int>();
int middle = numbers.Count / 2;
List <int> L = numbers.GetRange(0, middle);
List <int> R = numbers.GetRange(middle, numbers.Count - middle);
L = MergeSort(L, switchlimit);
R = MergeSort(R, switchlimit);
return(Merge(L, R));
}
static void Main(string[] args)
{
//defaults
int arg1 = 1000000;
int arg2 = Sorts.HIGH_VARIANCE;
int arg3 = RANDOM_DATA;
if (args.Length == 0)
{
Console.WriteLine("Pokial si prajete zmenit vstupnu sadu, spustite program z konzoly v tvare: SortsBenchmark.exe pocet_cisel_sady najvacsie_cislo_v_sade typ_sady");
Console.WriteLine("kde typ sady je integer: 1=RANDOM, 2=ALMOST_SORTED, 3=ALMOST_REVERSE_SORTED. Default=1");
}
if (args.Length >= 3)
{
arg3 = int.Parse(args[2]);
}
if (args.Length >= 2)
{
arg2 = int.Parse(args[1]);
}
if (args.Length >= 1)
{
arg1 = int.Parse(args[0]);
}
List <int> numbers = GenerateNumbers(arg1, arg2, arg3);
//List<int> numbers = new List<int>(new int[] { 12345 });
List <int> it;
var sw = new System.Diagnostics.Stopwatch();
////bubblesort
//sw.Start();
//it = Sorts.BubbleSort(new List<int>(numbers));
//sw.Stop();
//PrintSWLog(sw, "Bubblesort");
for (int switchlimit = 10; switchlimit < 80; switchlimit += 15)
{
//quicksort
sw.Restart();
it = Sorts.QuickSort(new List <int>(numbers), switchlimit);
sw.Stop();
PrintSWLog(sw, "QuickSort s uzitim InsertionSort na vstupy o velkosti do " + switchlimit + " cisiel");
}
for (int switchlimit = 10; switchlimit < 80; switchlimit += 15)
{
//quicksort-iterative
sw.Restart();
it = Sorts.IterativeQuickSort(new List <int>(numbers), switchlimit);
sw.Stop();
PrintSWLog(sw, "IterativeQuickSort s uzitim InsertionSort na vstupy o velkosti do " + switchlimit + " cisiel");
//Sorts.PrintArray(it, "vysledok WikiQuickSortu");
}
for (int switchlimit = 10; switchlimit < 80; switchlimit += 15)
{
//mergesort
sw.Restart();
it = Sorts.MergeSort(new List <int>(numbers), switchlimit);
sw.Stop();
PrintSWLog(sw, "MergeSort s uzitim InsertionSort na vstupy o velkosti do " + switchlimit + " cisiel");
//Sorts.PrintArray(it, "vysledok mergesortu");
}
//heapsort
for (int regularity = 2; regularity <= 10; regularity++)
{
sw.Restart();
it = Sorts.HeapSort(new List <int>(numbers), regularity);
sw.Stop();
PrintSWLog(sw, "HeapSort s " + regularity + "-regularnou haldou");
}
//radixsort
for (int prechody = 2; prechody <= 5; prechody++)
{
int exp = (int)Math.Ceiling(32 / (prechody * 1.0));
int zaklad = (int)Math.Pow(2, exp);
sw.Restart();
it = Sorts.RadixSort2(new List <int>(numbers), prechody);
sw.Stop();
//Sorts.PrintArray(it, "radixsort");
PrintSWLog(sw, prechody + "-prechodovy RadixSort (radix=2^" + exp + "=" + zaklad + ")");
}
Console.WriteLine("DONE");
Console.ReadLine();
}