Among object-oriented languages, one feature that varies considerably is whether the language allows multiple inheritance. C++ does but Ada does not. Java takes a middle ground approach of allowing multiple inheritance of interfaces but not classes. Using a C++ example, illustrate some of the complexities that multiple inheritance introduces. How does C++ deal with them? Why does Java's middle ground approach offer some of the benefits of multiple inheritance while avoids its problems.
Multiple inheritance is a feature of some object-oriented computer programming languages in which an object or class can inherit characteristics and features from more than one parent object or parent class. It is distinct from single inheritance, where an object or class may only inherit from one particular object or class.
In C++ language suppose there are four classes A, B, C and D.
class A {
void display()
{
//some code
}
}
class B : public A{
void display()
{
//write your code
}
}
class C : public A{
void display()
{
//write your code
}
}
class D : public B, public C{
//It will contains two display() functions
}
Class A is parent of class B and C Now when class D will be inherited from both Class B and C. Now class D contains two copies of all the functions and data members of class A. One copy comes from class B and another copy comes from class C. which will confuse the compiler to import which one? So this causes Diamond problem and C++ solves it by using virtual keyword with them and thus telling the compiler which one to inherit.
class A {
void display()
{
//write your code
}
}
class B : virtual public A{
void display()
{
//write your code
}
}
class C : virtual public A{
void display()
{
//write your code
}
}
class D : public B, public C{
// it will contains one display() functions
}
Java does not support multiple inheritance it introduced the interface concept rather then allowing multiple inheritance. Interfaces can provide default implementation of methods. And a class can implement two or more interfaces.There is no ambiguity in this case.
interface A {
default void display();
}
interface B {
default void display();
}
class C implements A, B {
public void display(){
//write your code
}
}
Among object-oriented languages, one feature that varies considerably is whether the language allows multiple inheritance. C++...
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