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

© Will Briggs 2019

W. BriggsC++ for Lazy Programmershttps://doi.org/10.1007/978-1-4842-5187-4_11

11. Animation with structs and Sprites

Will Briggs¹ 

(1)

Lynchburg, VA, USA

 

Time to make some movies. We’ll need a few more features.

structs

A str uct 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 can declare points using our ...