Only the instance method with the public, protected, or default access identifier can be overridden. Indeed, only this instance method can be inherited from its subclass and therefore called overridden. If the instance method specified in the parent class is a more restrictive public example method, it is not inherited in its subclass, and if someone defines the same method in a subclass, this scenario is not adopted as an overridden method because public methods cannot be inherited, this cannot be overridden. So when we call print() from the derived1 object, Derived executes print() by replacing the function in Base. In C++, it is possible to write a replacement for the method of a base class, even if the visibility declaration of the two does not match. What are the possible design considerations under the decision to disregard visibility in the general rule? Overloaded functions differ in the signature either in the number of parameters or in the type of parameters. When replacing functions, the function signatures remain the same. Replacement functions can only be used with class inheritance, while feature overload does not require class inheritance. The replacement of the method in c plus is carried out by declaring a method as virtual. A virtual keyword is used to obtain an execution polymorphism in C++. In Java, by default, all functions are used as virtual. It differs from method overload because it is an execution polymorphism process, while overload and method are an example of polymorphism at compile time. When replacing the method, it is imperative to keep the method signature.
When we make changes to the method return type or parameter list, the compiler treats them as a method overload. The print() function is declared in the Base and Derivated classes. When we call the print() function from the derived1 derived class object, print() is called from the derived class and executed by replacing the same function of the base class. The access identifier present in the method of the parent class must be as restrictive or restrictive as the method that replaces it in the child class. Function override occurs when you create a function with the same name as a function that already exists in a base class. In this case, the new function replaces the existing function and can be used instead of the original function. Overload occurs when you create functions with the same name but with different parameters. In this case, in addition to the original function, the new function is called, and both functions can be easily used in any context.
OOPs, the concepts, make code robust and easy to reuse when used effectively. This feature improves the use of inheritance to provide a specific implementation for the generic method of a parent class in its subclasses. The concept of runtime polymorphism is used to trigger the correct definition of the method. Debugging the dynamic method occurs only at run time, which validates the reference of the class that contains the object to call the method. This function is guided by various rules and does not apply to static methods. We can implement this in any object-oriented language and make our program faster and more robust. The replacement of the function is performed at run time. The replacement redefines the base class in the derived class with the same return type and parameters. Other differences between override functions and overload functions in C++ include: A list of parameters declared in the parent class function must match the list of parameters mentioned in the definition of the replacement method in the child class.
When a derived class or child class defines a function already defined in the base class or parent class, it is called a function replacement in C++. Replacing functions helps us achieve execution polymorphism. It allows programmers to perform the specific implementation of a function already in use in the base class. Function replacement is important when a derived class function needs to perform a different performance or function with additional functionality to that of the base class function. Function overload is implemented when functions with the same name must exhibit different behaviors depending on the parameters passed to them. When implementing the concept of inheritance in oops, all parent class functions are used by all derived classes. If a derived class wants to declare the specific implementation of the function in the parent class, but uses the same name, signature, and return type, an override function is used. Replacement allows the child class to redefine the function that has already been defined in its parent class or superclass. In this way, you can use the definition by specifying the object of the class when calling the method. For example, whether there is a sum function in the parent and child classes, and while we call the function, we use the object of the child class, then the method present in the child class is called, and if you use a parent class object instead, the existing method in the parent class is called. This method in the child class is intended to replace the method present in its superclasses. In a member function declaration or definition, the alternate identifier ensures that the function is virtual and replaces a virtual function in a base class.