Inheritance in C sharp Assignment Help
INHERITANCE
- The process of deriving a new classNamefrom an existing classNameis called inheritance
- It is one of the important concepts of object oriented programming.
- It is the vital concept of code reusability
- To avoid the repetition of code , inheritance can be used
- The already existing classNameis called the base className, and the new classNamewhich is derived from the base classNameis referred to as the derived className.
Inheritance in C sharp Assignment Help By Online Tutoring and Guided Sessions from assignmenthippo.com
- The inheritance implements the ‘is a’ relationship.
e.g.
- Four wheeler is a vehicle, car is a four wheeler therefore car is a vehicle as well a four wheeler
Basic Concept of Inheritance: Base and Derived Classes
- To inherit the existing properties of pre existing className, a classNamecan be derived from
one or more base classNameor interface
- Inheritance inherits member variables and members from multiple base classes or interfaces.
Syntax
acess-specifier classNamebase_class
{
...
}classNamederived_className: base_class
{
...
}
Example
Here a base classNameShape and its derived classNameRectangle is used as an inheritance example
using System;
namespace Inheritance
{
classNameShape // Base className
{
public void setWidth(int w)
{
width = w;
}
public void setHeight(int h)
{
height = h;
}
protected int width;
protected int height;
}
classNameRectangle: Shape // Derived className
{
public int getArea()
{
return (width * height);
}
}
classNameRectangleTest
{
static void Main(string[] args)
{
Rectangle R = new Rectangle();
R.setWidth(5);
R.setHeight(7);
Console.WriteLine("Total area: {0}", Rect.getArea());
Console.ReadKey();
}
}
}
Output: Total area: 35
Types of Inheritance in C#
- Single Inheritance
- Multilevel Inheritance
- Hierarchical Inheritance
- Hybrid Inheritance
Note: Multiple Inheritances is not supported in c# but it can be achieved through an Interface
Example
The following example demonstrates the usage of interface in implementing the multiple inheritance in c#
using System;
namespace Inheritance
{
classNameShape
{
public void setW (int w)
{
width = w;
}
public void setH (int h)
{
height = h;
}
protected int width;
protected int height;
}
public interface Paint // Base classNamePaintCost
{
int getCost(int area);
}
classNameRectangle : Shape, Paint // Derived className
{
public int getArea()
{
return (width * height);
}
public int getCost(int area)
{
return area * 70;
}
}
classNameRectangleTester
{
static void Main(string[] args)
{
Rectangle Rect = new Rectangle();
int area;
Rect.setW(5);
Rect.setH (10);
area = Rect.getArea();
{'// Print the area of the object.'}
Console.WriteLine("Total area: {0}", Rect.getArea());
Console.WriteLine("Total paint cost: ${0}" , Rect.getCost(area));
Console.ReadKey();
}
}
}
Output: Total area: 50
Total paint cost: $3500
