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labs/lab6_done/Book/Program.cs

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+using System;
+
+public class Program
+{
+    public static void Main(string[] args)
+    {
+        Book b1 = new Book();
+        b1.SetBook("Пушкин А.С.", "Капитанская дочка", "Вильямс", 123, 2012);
+        Book.SetPrice(12);
+        b1.Show();
+        Console.WriteLine("\n Итоговая стоимость аренды: {0} р.", b1.PriceBook(3));
+
+        Book b2 = new Book("Толстой Л.Н.", "Война и мир", "Наука и жизнь", 1234, 2013);
+        b2.Show();
+
+        Book b3 = new Book("Лермонтов М.Ю.", "Мцыри");
+        b3.Show();
+
+
+        Triangle t1 = new Triangle(3, 4, 5);
+        t1.Show();
+        Console.WriteLine("perimeter = {0}", t1.Perimeter());
+        Console.WriteLine("area = {0}", t1.Area());
+        Console.WriteLine("does this triangle exist? {0}", t1.Exists());
+
+        Triangle t2 = new Triangle(3, 4, 7);
+        t2.Show();
+        Console.WriteLine("does this triangle exist? {0}", t2.Exists());
+
+    }
+}