C++: inheritance, composition, polymorphism

C++: Composition, Aggregation and Polymorphism Jussi Pohjolainen TAMK University of Applied Sciences

Inheritance ,[object Object],[object Object]

Basic example ,[object Object],Human string name void sleep() void drink() void eat() Programmer int salary void implementApps() void beNerd()

Abstract Class ,[object Object],[object Object],[object Object],[object Object]

Example <<abstract>> Mammal string name void makesound() {abstract} Elephant int trunkLength makesound()

Composition ,[object Object],[object Object],[object Object],[object Object]

C++: Composition ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Aggregation ,[object Object],[object Object],[object Object],[object Object]

C++: Simple Aggregation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

C++: One to Many ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

One to Many? ,[object Object],[object Object],[object Object]

Vector ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Vector Possibilities ,[object Object],[object Object],[object Object]

Simple Example ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

When the elements are created dynamically ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

When the elements are created dynamically – part 2 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

When vector is created dynamically ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

vector and elements dynamically ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

vector methods ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

C++: One to Many ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Introduction to Polymorphism ,[object Object],[object Object],[object Object],[object Object]

Pointer Type differs from Object Type? ,[object Object],[object Object],[object Object],[object Object]

Pointer type vs. Object type ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

C++ ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Array ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

vector ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

vector: Everything into dynamic memory ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Problem? ,[object Object],[object Object],[object Object],[object Object],[object Object]

Casting ,[object Object],[object Object],[object Object],[object Object]

Type info ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Zoo-example ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Inheritance Example (1/2) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Inheritance Example (2/2) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

C++ ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

C++ ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

What about now? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Fix ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Without Virtual ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

With Virtual ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Virtual in Destructors ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Mammal* pekka = new Human(); delete pekka; Result: Mammal Constructor Human Constructor Mammal Destructor

Virtual in Destructors ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Mammal* pekka = new Human(); delete pekka; Result: Mammal Constructor Human Constructor Human Destructor Mammal Destructor

Problem ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Solution ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

C++: inheritance, composition, polymorphism

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C++: inheritance, composition, polymorphism