interface "ifunction"

/* problem 1 - code should be self explanatory */

using System;

class car

{

private int numberOfDoors;

private int numberOfWheels;

public void DisplayNumberOfDoors()

{

Console.WriteLine("The number of doors is {0}", numberOfDoors);

}

public void DisplayNumberOfWheels()

{

Console.WriteLine("The number of wheels is {0}", numberOfWheels);

}

public void AcceptNumberOfDoors(int numDoors)

{

numberOfDoors = numDoors;

}

public void AcceptNumberOfWheels(int numWheels)

{

numberOfWheels = numWheels;

}

class Test

{

static void Main()

{

car c = new car();

c.AcceptNumberOfDoors(4);

c.DisplayNumberOfDoors();

c.AcceptNumberOfWheels(4);

c.DisplayNumberOfWheels();

Console.ReadKey();

}

/* problem 2 - changes and comments highlighted */

using System;

// interface members don't use access modifiers but are implicitly public

interface ifunction

{

string getfueltype();

void setfueltype(string fueltype);

}

class car : ifunction // now implements ifunction interface

{

private int numberOfDoors;

private int numberOfWheels;

private string fueltype; // need a private field to store the fuel type

public void DisplayNumberOfDoors()

{

Console.WriteLine("The number of doors is {0}", numberOfDoors);

}

public void DisplayNumberOfWheels()

{

Console.WriteLine("The number of wheels is {0}", numberOfWheels);

}

public void AcceptNumberOfDoors(int numDoors)

{

numberOfDoors = numDoors;

}

public void AcceptNumberOfWheels(int numWheels)

{

numberOfWheels = numWheels;

}

public string getfueltype() // implements interface method - need to specify public now

{

return fueltype; // return the field value

}

public void setfueltype(string fueltype) // also implements interface method

{

// need to prefix the field with 'this' distinguish from parameter of same name

this.fueltype = fueltype;

}

class Test

{

static void Main()

{

car c = new car();

c.AcceptNumberOfDoors(4);

c.DisplayNumberOfDoors();

c.AcceptNumberOfWheels(4);

c.DisplayNumberOfWheels();

c.setfueltype("petrol");

Console.WriteLine(c.getfueltype());

Console.ReadKey();

}

1 Reply

Know the answer? Post it — somebody with the same question will find it here.

Vulpes13y ago
Accepted answer
/* problem 1 - code should be self explanatory */

using System;

class car
{
private int numberOfDoors;
private int numberOfWheels;

public void DisplayNumberOfDoors()
{
Console.WriteLine("The number of doors is {0}", numberOfDoors);
}

public void DisplayNumberOfWheels()
{
Console.WriteLine("The number of wheels is {0}", numberOfWheels);
}

public void AcceptNumberOfDoors(int numDoors)
{
numberOfDoors = numDoors;
}

public void AcceptNumberOfWheels(int numWheels)
{
numberOfWheels = numWheels;
}
}

class Test
{
static void Main()
{
car c = new car();
c.AcceptNumberOfDoors(4);
c.DisplayNumberOfDoors();
c.AcceptNumberOfWheels(4);
c.DisplayNumberOfWheels();
Console.ReadKey();
}
}

/* problem 2 - changes and comments highlighted */

using System;

// interface members don't use access modifiers but are implicitly public
interface ifunction
{
string getfueltype();
void setfueltype(string fueltype);
}

class car : ifunction // now implements ifunction interface
{
private int numberOfDoors;
private int numberOfWheels;
private string fueltype; // need a private field to store the fuel type

public void DisplayNumberOfDoors()
{
Console.WriteLine("The number of doors is {0}", numberOfDoors);
}

public void DisplayNumberOfWheels()
{
Console.WriteLine("The number of wheels is {0}", numberOfWheels);
}

public void AcceptNumberOfDoors(int numDoors)
{
numberOfDoors = numDoors;
}

public void AcceptNumberOfWheels(int numWheels)
{
numberOfWheels = numWheels;
}

public string getfueltype() // implements interface method - need to specify public now
{
return fueltype; // return the field value
}

public void setfueltype(string fueltype) // also implements interface method
{
// need to prefix the field with 'this' distinguish from parameter of same name
this.fueltype = fueltype;
}
}

class Test
{
static void Main()
{
car c = new car();
c.AcceptNumberOfDoors(4);
c.DisplayNumberOfDoors();
c.AcceptNumberOfWheels(4);
c.DisplayNumberOfWheels();
c.setfueltype("petrol");
Console.WriteLine(c.getfueltype());
Console.ReadKey();
}
}