Definition: An imperative language uses a sequence of statements to determine how to reach a certain goal. These statements are said to change the state of the program as each one is executed in turn. Examples: Java is an imperative language. For example, a program can be created to add a series of numbers: Each statement changes … Read more
Your constructor should be defined the following way
A “Driver class” is often just the class that contains a main. In a real project, you may often have numerous “Driver classes” for testing and whatnot, or you can build a main into any of your objects and select the runnable class through your IDE, or by simply specifying “java classname.”
A mixin is a special kind of multiple inheritance. There are two main situations where mixins are used: You want to provide a lot of optional features for a class. You want to use one particular feature in a lot of different classes. For an example of number one, consider werkzeug’s request and response system. I … Read more
The class declaration goes into the header file. It is important that you add the #ifndef include guards. Most compilers now also support #pragma once. Also I have omitted the private, by default C++ class members are private. and the implementation goes in the CPP file:
61 extends should go before implements:
A metaclass is the class of a class. A class defines how an instance of the class (i.e. an object) behaves while a metaclass defines how a class behaves. A class is an instance of a metaclass. While in Python you can use arbitrary callables for metaclasses (like Jerub shows), the better approach is to make it … Read more
What is the precise difference between encapsulation and abstraction?
Virtual methods have an implementation and provide the derived classes with the option of overriding it. Abstract methods do not provide an implementation and force the derived classes to override the method. So, abstract methods have no actual code in them, and subclasses HAVE TO override the method. Virtual methods can have code, which is … Read more
C++ is usually considered a “multi-paradigm” language. That is, you can use it for object-oriented, procedural, and even functional programming. Those who would deny that C++ is OO generally have beef with the fact that the primitive types are not objects themselves. By this standard, Java would also not be considered OO. It is certainly … Read more