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New Message on BDOTNET
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From: RedSunBeer
Message 2 in Discussion
using System;
class A
{
/*The method 'F' being virtual depends upon some other class method to
implement it. */ public virtual void F() {
Console.WriteLine("A.F");
}
}
class B: A //class B inherits A
{ ///method 'F' of class B overrides the method 'F' of class A ///This
means the code in method 'F' of class A will not be executed
public override void F() {
Console.WriteLine("B.F");
}
}
class C: B //class C inherits B
{
///method 'F' of class C overrides the method 'F' of class B ///This means
the code in method 'F' of class B will not be executed
new public virtual void F() {
Console.WriteLine("C.F");
}
}
class D: C //class D inherits C
{
///method 'F' of class D overrides the method 'F' of class C ///This means
the code in method 'F' of class C will not be executed
public override void F() {
Console.WriteLine("D.F");
}
}
class Test
{ //the main method is the entry point for executing this class. //It is
always static. Static means you cannot create an new instance of it.
static void Main() {
D d = new D(); //creates an object 'd' of class type 'D'
A a = d; //declare a variable 'a' of class type 'A' and assign object 'd' to
it. this is possible because class D inherits class A.
B b = d; //declare a variable 'b' of class type 'B' and assign object 'd' to
it C c = d; //declare a variable 'c' of class type 'C' and assign object 'd'
to it
a.F(); //this is a virtual method so it will be executed by the class method
that implements it, in this case B.F()
b.F(); //this is a concrete class method and so it will execute.
c.F(); //similar to a.F()
d.F(); //similar to b.F()
}
}
the output:
B.F
B.F
D.F
D.F
ps: I could be wrong you know OOPs :)
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