How To Define Abstract Class In C

Abstract classes are used to represent general concepts for example shape animal which can be used as base classes for concrete classes for example circle dog.

How to define abstract class in c. 1 a class is abstract if it has at least one pure virtual function. An abstract represents a property that you know the class possesses but do not know how to implement unambiguously in the current class. A class is the abstract if it has at least one pure virtual function. Therefore account is a good candidate for an abstract class.

In the following example test is an abstract class because it has a pure virtual function show. See the following example. A class is abstract if it contains one or more pure virtual methods. See the following syntax.

The intent of class account is to provide general functionality but objects of type account are too general to be useful. Abstract class in c example c abstract class tutorial abstract class in c. Abstract class and pure virtual function in c. Classes inheriting an abstract class must provide definition to the pure virtual function otherwise they will also become abstract class.

Classes derived from the abstract class must implement the pure virtual function or they too are abstract classes. No objects of an abstract class can be created except for base subobjects of a class derived from it and no non static data members of an abstract class can be declared. An abstract class is conceptually a class that cannot be instantiated and is usually implemented as a class that has one or more pure virtual abstract functions. A class that contains at least one pure virtual function is considered an abstract class.

Now coming to an. A pure virtual function in. The oven class is said to be abstract. Abstract class is a class which contains atleast one pure virtual function in it.

A pure virtual function is one which must be overridden by any concrete ie non abstract derived class. C programmers also use the term preferred in many other strongly typed computer languages.