8000 Added slides for sixth session · estimand/intro-to-cpp@5e0a77a · GitHub
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Added slides for sixth session
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‎06_oop/slides/oop.pdf

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‎06_oop/slides/oop.tex

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\input{../../_common/preamble}
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\title{Object-oriented programming}
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\begin{document}
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\maketitle
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\begin{frame}{Classes and objects}
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\begin{block}{Class}
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\begin{itemize}
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\item The blueprint for an object
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\item Encapsulates \alert{state} and \alert{behaviour}
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\end{itemize}
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\end{block}
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\begin{block}{Object}
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\begin{itemize}
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\item An instance of a class
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\item Holds data and functions
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\end{itemize}
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\end{block}
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\end{frame}
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\begin{frame}{Abstraction}
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\begin{block}{Classes should\ldots}
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\begin{itemize}
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\item Provide only essential information to the external world
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\item Hide any internal implementation details
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\end{itemize}
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\end{block}
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\end{frame}
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\begin{frame}{Inheritance and polymorphism}
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\begin{block}{Classes can\ldots}
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\begin{itemize}
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\item Reuse code by inheriting from another class
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\item Redefine functions through polymorphism
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\item Define the meaning of operators through overloading
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\end{itemize}
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\end{block}
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\end{frame}
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\begin{frame}[fragile]{Defining a new class}
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\begin{onlyenv}<1>
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\begin{block}{Definition}
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\begin{cpp}
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class Rectangle {
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int width, height;
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public:
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Rectangle(int, int);
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int area(void);
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}; // Mind the semicolon!
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\end{cpp}
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\end{block}
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\end{onlyenv}
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\begin{onlyenv}<2>
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\begin{block}{Implementation}
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\begin{cpp}
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Rectangle::Rectangle(int w, int h) {
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width = w;
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height = h;
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}
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Rectangle::area() {
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return width * height;
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}
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\end{cpp}
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\end{block}
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\end{onlyenv}
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\end{frame}
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\begin{frame}[fragile]{Don't overuse classes and objects!}
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\begin{itemize}
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\item OOP can be overkill (especially for small programs)
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\item Classes make your code more verbose
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\item Try \mintinline{cpp}{struct}s if you just need `data containers'
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\end{itemize}
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\end{frame}
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\end{document}
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