In multilevel inheritance, which is the most significant feature of oop used?
Inheritance is one of the core feature of an object-oriented programming language. It allows software developers to derive a new class from the existing class. The derived class inherits the features of the base class (existing class). Show
There are various models of inheritance in C++ programming. C++ Multilevel InheritanceIn C++ programming, not only you can derive a class from the base class but you can also derive a class from the derived class. This form of inheritance is known as multilevel inheritance. class A { ... .. ... }; class B: public A { ... .. ... }; class C: public B { ... ... ... }; Here, class B is derived from the base class A and the class C is derived from the derived class B. Example 1: C++ Multilevel Inheritance
Output Base class content. In this program, class C is derived from class B (which is derived from base class A). The obj object of class C is defined in the 0 function.When the 1 function is called, 1 in class A is executed. It's because there is no 1 function in class C and class B.The compiler first looks for the 1 function in class C. Since the function doesn't exist there, it looks for the function in class B (as C is derived from B).The function also doesn't exist in class B, so the compiler looks for it in class A (as B is derived from A). If 1 function exists in C, the compiler overrides 1 of class A (because of member function overriding).C++ Multiple InheritanceIn C++ programming, a class can be derived from more than one parent. For example, A class Bat is derived from base classes Mammal and WingedAnimal. It makes sense because bat is a mammal as well as a winged animal. Multiple InheritanceExample 2: Multiple Inheritance in C++ Programming
Output Mammals can give direct birth. Winged animal can flap. Ambiguity in Multiple InheritanceThe most obvious problem with multiple inheritance occurs during function overriding. Suppose, two base classes have a same function which is not overridden in derived class. If you try to call the function using the object of the derived class, compiler shows error. It's because compiler doesn't know which function to call. For example,
This problem can be solved using the scope resolution function to specify which function to class either base1 or base2 int main() { obj.base1::someFunction( ); // Function of base1 class is called obj.base2::someFunction(); // Function of base2 class is called. } C++ Hierarchical InheritanceIf more than one class is inherited from the base class, it's known as hierarchical inheritance. In hierarchical inheritance, all features that are common in child classes are included in the base class. For example, Physics, Chemistry, Biology are derived from Science class. Similarly, Dog, Cat, Horse are derived from Animal class. Syntax of Hierarchical Inheritanceclass base_class { ... .. ... } class first_derived_class: public base_class { ... .. ... } class second_derived_class: public base_class { ... .. ... } class third_derived_class: public base_class { ... .. ... } Example 3: Hierarchical Inheritance in C++ Programming
Output Dog Class: I am an animal. I am a Dog. Woof woof. Cat Class: I am an animal. I am a Cat. Meow. Here, both the 7 and 8 classes are derived from the 9 class. As such, both the derived classes can access the Base class content.0 function belonging to the 9 class.
What is multilevel inheritance in OOP?In the Multilevel inheritance, a derived class will inherit a base class and as well as the derived class also act as the base class to other class. For example, three classes called A, B, and C, as shown in the below image, where class C is derived from class B and class B, is derived from class A.
What is the most important in OOP?The most important concept of Object-Oriented Programming for me is not inheritance, encapsulation, or polymorphism, but the notion of keeping the data and the related code close. The point of this is being able to keep your program structured and traceable. All other properties of OOP are related to this concept.
What is the importance of inheritance in OOP?The main purpose of inheritance in Object Orientated Programming (OOP) is to give the user ability to change the behavior of the libraries, without actually changing already working and debugged code.
Does OOP support multilevel inheritance?Multiple inheritance is a feature of Object-oriented programming language where a class can inherit more than one class. Java doesn't support multiple inheritances of classes.
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