C++20 for Lazy Programmers: Quick, Easy, and Fun C++ for Beginners

© Will Briggs 2021

W. BriggsC++20 for Lazy Programmershttps://doi.org/10.1007/978-1-4842-6306-8_11

11. Animation with structs and Sprites

Will Briggs¹  

(1)

Lynchburg, VA, USA

 

Time to make some movies (and, soon after, arcade games). We’ll need a few more features.

structs

A struct is a way of bundling information:

struct <name>

{

    <variable declaration>*

};

For example, here’s a type we’ve needed for a while: a geometric point. It has two parts, x and y:

struct Point2D

{

   int x_, y_;

};

(The trailing _’s are a convention meaning “member of something else.” We’ll see why that’s worth bothering with in Chapter 16.)

This version’s even better. We’ll build default values right into the struct. 0 is a good default:

struct Point2D

{

   int x_= 0, y_= 0;

};

Now we ...