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