Abstract classes cannot be used to instantiate objects and serves only as an interface. Attempting to instantiate an object of an abstract class causes a
Abstract classes and Interfaces. ? Difference between extends and implements. ? Multiple inheritance. ? Comparator and Comparable. ? Comparing objects.
Problem: A polygon may be either a triangle or a rectangle. Given a polygon we may either. ? Grow its shape by incrementing the size of each of its sides;.
http://www.cs.cf.ac.uk/Dave/CM2204/PDF/CM2204_Week10_lecture.pdf
09-Dec-2020 An abstract class can contain abstract methods that are implemented in concrete subclasses. • An interface is a class-like construct that ...
you have to inherit both the interface and the implementation? C++: Yes (class and Abstract Base Classes). Java: Yes (class via extends + interface
we implemented the inheritance between Stock and DividendStock and an interface. • C++ does not have interfaces but it (sort of) has abstract classes.
An abstract class lets us define and enforce a common interface or The C and C++ languages support the built in type conversions.
CS61B Lecture #9: Interfaces and Abstract Classes. Recreation. Show that for any polynomial with a leading coefficient of 1 and integral.
In C++ pure virtual function are used to specify the pure interfaces of abstract classes. An abstract class in C++ must have at least one pure virtual function