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());
}
}

abstract class Street
{
protected string name;
protected string direction;
public Street(string name, string travelDirection)
{
this.name = name;
direction = travelDirection;
}
public string Name
{
get
{
return name;
}
}
public abstract string MakeUTurn();
}

class OneWayStreet : Street
{
public OneWayStreet(string name, string direction) : base(name, direction)
{
}
public override string MakeUTurn()
{
string temp = "U Turn is illegal! Was going and still going " + direction;
return temp;
}
}

class TwoWayStreet : Street
{
public TwoWayStreet(string name, string direction) : base(name, direction)
{
}
public override string MakeUTurn()
{
string wasGoing = direction;
string[] directions = { "north", "south", "east", "west" };
string[] oppDirections = { "south", "north", "west", "east" };
for (int x = 0; x < directions.Length; ++x)
{
if (direction.Equals(directions[x]))
{
direction = oppDirections[x];
break;
}
}
string temp = "U Turn successful. Was going " + wasGoing + ". Now going " + direction;
return temp;
}
}
a) The Street class should have a default constructor with no parameters
b) The WriteLine statements should use Console.WriteLine instead
c) The MakeUTurn method in the TwoWayStreet class should handle the case where the current direction is not found in the directions array
d) The Street class should have public access modifiers for its members