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// Street is an abstract class // OneWayStreet and TwoWayStreet derive from Street // On a OneWayStreet, it is illegal to make a U turn // On a TwoWayStreet, a U Turn reverses the travelling direction // Main program creates two Street child objects - one OneWay and one TwoWay // and demonstrates what happens when you make a U Turn // on a OneWayStreet and a TwoWayStreet

// Street is an abstract class // OneWayStreet and TwoWayStreet derive from Street // On a OneWayStreet, it is illegal to make a U turn // On a TwoWayStreet, a U Turn reverses the travelling direction // Main program creates two Street child objects - one OneWay and one TwoWay // and demonstrates what happens when you make a U Turn // on a OneWayStreet and a TwoWayStreet

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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// Street is an abstract class
// OneWayStreet and TwoWayStreet derive from Street
// On a OneWayStreet, it is illegal to make a U turn
// On a TwoWayStreet, a U Turn reverses the travelling direction

// Main program creates two Street child objects - one OneWay and one TwoWay
// and demonstrates what happens when you make a U Turn
// on a OneWayStreet and a TwoWayStreet

using static System.Console;
class DebugTen02
{
   static void Main()
   {
      OneWayStreet oak = new OneWayStreet("Oak Avenue", "east");
      TwoWayStreet elm = new TwoWayStreet("Elm Street", "south");
      WriteLine("On " + oak.Name + " " + oak.MakeUTurn());
      WriteLine("On " + oak.Name + " " + oak.MakeUTurn());
      WriteLine("On " + elm.Name + " " + elm.MakeUTurn());
      WriteLine("On " + elm.Name + " " + elm.MakeUTurn());
   }
}
class abstract Street
{
   protected string name;
   private string direction;
   public Street(string name string travelDirection)
   {
      name = name;
      direction = direction;
   }
   public string Name
   {
      get
      {
         return Name;
      }
   }
   public abstract string MakeUTurn();
}
class OneWayStreet : Street
{
   public OneWayStreet(string name, string direction)
   {
   }
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