Data commit

Task/Set/C-sharp/set.cs

@@ -0,0 +1,56 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+class Program
+{
+    static void PrintCollection(IEnumerable<int> x)
+    {
+        Console.WriteLine(string.Join(" ", x));
+    }
+    static void Main(string[] args)
+    {
+        Console.OutputEncoding = Encoding.UTF8;
+        Console.WriteLine("Set creation");
+        var A = new HashSet<int> { 4, 12, 14, 17, 18, 19, 20 };
+        var B = new HashSet<int> { 2, 5, 8, 11, 12, 13, 17, 18, 20 };
+
+        PrintCollection(A);
+        PrintCollection(B);
+
+        Console.WriteLine("Test m ∈ S -- \"m is an element in set S\"");
+        Console.WriteLine("14 is an element in set A: {0}", A.Contains(14));
+        Console.WriteLine("15 is an element in set A: {0}", A.Contains(15));
+
+        Console.WriteLine("A ∪ B -- union; a set of all elements either in set A or in set B.");
+        var aUb = A.Union(B);
+        PrintCollection(aUb);
+
+        Console.WriteLine("A ∖ B -- difference; a set of all elements in set A, except those in set B.");
+        var aDb = A.Except(B);
+        PrintCollection(aDb);
+
+        Console.WriteLine("A ⊆ B -- subset; true if every element in set A is also in set B.");
+        Console.WriteLine(A.IsSubsetOf(B));
+        var C = new HashSet<int> { 14, 17, 18 };
+        Console.WriteLine(C.IsSubsetOf(A));
+
+        Console.WriteLine("A = B -- equality; true if every element of set A is in set B and vice versa.");
+        Console.WriteLine(A.SetEquals(B));
+        var D = new HashSet<int> { 4, 12, 14, 17, 18, 19, 20 };
+        Console.WriteLine(A.SetEquals(D));
+
+        Console.WriteLine("If A ⊆ B, but A ≠ B, then A is called a true or proper subset of B, written A ⊂ B or A ⊊ B");
+        Console.WriteLine(A.IsProperSubsetOf(B));
+        Console.WriteLine(C.IsProperSubsetOf(A));
+
+        Console.WriteLine("Modify a mutable set.  (Add 10 to A; remove 12 from B).");
+        A.Add(10);
+        B.Remove(12);
+        PrintCollection(A);
+        PrintCollection(B);
+
+        Console.ReadKey();
+    }
+}