public static void ThreadsSortDemo()
{
Console.Clear();
Console.WriteLine("Task 4.3. Sorting Unit." + Environment.NewLine);
Console.WriteLine("Sorting Unit consists of three parts:");
Console.WriteLine("1. The sorting method from Task 4.1.");
Console.WriteLine("2. A method, running the sorting method in an additional Thread.");
Console.WriteLine("3. Event signalizing that sorting is finished." + Environment.NewLine);
Console.WriteLine("Press enter to start a demonstration.");
Console.ReadLine();
var numberOfElements = 10000000;
Console.WriteLine($"Let's create two arrays of {numberOfElements} elements and fill them with random numbers." +
"The first one is of ints, the second one is of doubles.");
var sortUnit = new CustomSort();
sortUnit.OnSortIsFinished += OnSortIsFinishedEventHandler;
var arr1 = new int[numberOfElements];
var arr2 = new double[numberOfElements];
var rand = new Random();
for (int i = 0; i < numberOfElements; i++)
{
arr1[i] = rand.Next(-numberOfElements, numberOfElements);
arr2[i] = rand.NextDouble() * numberOfElements * 2 - numberOfElements;
}
Console.WriteLine($"arr1: {arr1}; arr1.Length = {arr1.Length}");
Console.WriteLine($"arr2: {arr2}; arr2.Length = {arr2.Length}");
Console.WriteLine(Environment.NewLine + "Sort parameter: arr1 - ascending order, arr2 - descending order.");
sortUnit.SortInAdditionalThread <int>(arr1, (a, b) => a < b);
sortUnit.SortInAdditionalThread <double>(arr2, (a, b) => a > b);
Console.WriteLine("While the sorting is being performed in additional threads, " +
"we are seeing some activity in the main thread.");
while (_threadsNumber != 2)
{
Console.Write("\rSorting");
Thread.Sleep(500);
if (_threadsNumber != 2)
{
Console.Write("\r ");
Thread.Sleep(500);
}
}
_threadsNumber = 0;
sortUnit.OnSortIsFinished -= OnSortIsFinishedEventHandler;
Console.WriteLine("Press enter to show first and last 50 elements of sorted arrays:");
Console.ReadLine();
Console.WriteLine("arr1 first 50:");
for (int i = 0; i < 50; i++)
{
Console.Write($"{arr1[i]}; ");
}
Console.WriteLine(Environment.NewLine + Environment.NewLine + "arr1 last 50:");
for (int i = arr1.Length - 50; i < arr1.Length; i++)
{
Console.Write($"{arr1[i]}; ");
}
Console.WriteLine(Environment.NewLine + Environment.NewLine + "arr2 first 50:");
for (int i = 0; i < 50; i++)
{
Console.Write($"{arr2[i]:N2}; ");
}
Console.WriteLine(Environment.NewLine + Environment.NewLine + "arr2 last 50:");
for (int i = arr2.Length - 50; i < arr2.Length; i++)
{
Console.Write($"{arr2[i]:N2}; ");
}
Console.WriteLine(Environment.NewLine + Environment.NewLine +
"Press enter to exit");
Console.ReadLine();
}
public static void DoubleIntSortDemo()
{
var sortUnit = new CustomSort();
var rand = new Random();
var arrayLength = 20;
Console.Clear();
Console.WriteLine("Task 4.1. Custom Sort.");
Console.WriteLine("You can sort array of ints and doubles, in ascending and descending order using one method.");
Thread.Sleep(1000);
Console.WriteLine("Let's start with the following array of doubles." + Environment.NewLine);
var arrayDouble = new double[arrayLength];
for (int i = 0; i < arrayLength; i++)
{
arrayDouble[i] = rand.NextDouble() * 2 * arrayLength - arrayLength;
}
CSharpLanguage.Display1DArray <double>(arrayDouble);
Console.WriteLine();
Thread.Sleep(2000);
Console.WriteLine(Environment.NewLine + "It can be sorted in ascending order by calling the following method:");
Console.WriteLine("SortArray <double> ( arrayDouble, (a,b) => a < b );");
Console.WriteLine("Press enter to sort.");
Console.ReadLine();
sortUnit.SortArray <double>(arrayDouble, (a, b) => a < b);
CSharpLanguage.Display1DArray <double>(arrayDouble);
Console.WriteLine();
Console.WriteLine(Environment.NewLine + "It can be sorted in descending order by calling the following method:");
Console.WriteLine("SortArray <double> ( arrayDouble, (a,b) => a > b );");
Console.WriteLine("Press enter to sort.");
Console.ReadLine();
sortUnit.SortArray <double>(arrayDouble, (a, b) => a > b);
CSharpLanguage.Display1DArray <double>(arrayDouble);
Console.WriteLine();
Console.WriteLine(Environment.NewLine + "Press enter to perform these operations with an array of ints.");
Console.ReadLine();
Console.Clear();
Console.WriteLine("Array of ints:" + Environment.NewLine);
var arrayInt = new int[arrayLength];
for (int i = 0; i < arrayLength; i++)
{
arrayInt[i] = rand.Next(-arrayLength, arrayLength + 1);
}
CSharpLanguage.Display1DArray <int>(arrayInt);
Console.WriteLine();
Console.WriteLine(Environment.NewLine + "Press enter to sort ascending.");
Console.WriteLine("SortArray <int> ( arrayInt, (a,b) => a < b );");
Console.ReadLine();
sortUnit.SortArray <int>(arrayInt, (a, b) => a < b);
CSharpLanguage.Display1DArray <int>(arrayInt);
Console.WriteLine();
Console.WriteLine(Environment.NewLine + "Press enter to sort descending.");
Console.WriteLine("SortArray <int> ( arrayInt, (a,b) => a > b );");
Console.ReadLine();
sortUnit.SortArray <int>(arrayInt, (a, b) => a > b);
CSharpLanguage.Display1DArray <int>(arrayInt);
Console.WriteLine(Environment.NewLine);
Console.WriteLine("The end. Press enter to exit.");
Console.ReadLine();
}