How many types of polymorphism c have

Note, however, that it doesn't work on pointer types because comparing pointers compares the memory locations and not the contents. To get it working for pointers you'd have to specialize the template for pointer types and that would no longer be parametric polymorphism but would be ad-hoc polymorphism. Since parametric polymorphism happens at compile time, it's also called compile-time polymorphism.

Ad-hoc polymorphism allows functions with the same name act differently for each type. Given two std::string s it concatenates them together. This is called overloading. Here is a concrete example that implements function add for int s and string s,.

Now you can call ::max "foo", "bar" to find maximum of strings "foo" and "bar". Report a Bug. Previous Prev. Next Continue. Home Testing Expand child menu Expand. SAP Expand child menu Expand. Web Expand child menu Expand. Must Learn Expand child menu Expand. Big Data Expand child menu Expand. Live Project Expand child menu Expand. AI Expand child menu Expand. Polymorphism, therefore, is the ability for objects of different classes related by inheritance to response differently to the same function call.

Polymorphism is achieved by means of virtual functions. It is rendered possible by the fact that one pointer to a base class object may also point to any object of its derived class. Top Gaming Computers. Best Laptops. Best Graphic Cards. Portable Hard Drives. Best Keyboards. Computer Accessories. I may make a commission if you buy the components through these links. I would appreciate your support in this way! The members of a class can be accessed through the pointer to the class.

This symbol is also known as member access operator. The general syntax to access a member of a class through its pointer is :. It is the member access operator.

It is used to access the members of the object through the pointer. If a pointer object is defined to point to a class, then it can also point to any of its subclass.

However, even if the pointer points to an object of its derived class, it remains of base class type. A program may have a base class and several derived classes. When a pointer is declared to point to the base class, it can also point to the classes derived from this base class. When a base class pointer is used to point to an object of a derived class, the pointer type remains unchanged, its type remains of the base class.

As in the above program, classes A and B are created, where A is a base class and B is a derived class. The display function of the base class is redefined in the derived class is called function overriding. In the main function creating the object of class B and calling the display function, here the display function of class B gets execute which is decided based on the object on which it is calling.

As we can see in the above output. The virtual display function of the base class is redefined in the derived class. There are two types of polymorphism, which are compiled time polymorphism and runtime polymorphism. Here we discuss description, types of polymorphism, and its working example with code implementation.

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