© 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 ...

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