/*
Structures allow us to construct a collection or sequence of variables, which can be of any type
*/
#include <stdio.h>

//ask dan
typedef unsigned char byte;

//alternative method is wrapping struct in a typedef
//The compiler doesn't care
typedef struct Color
{
	/* data */
	byte Red;
	byte Green;
	byte Blue;
} Color;

struct Pixel
{
	/* data */
	float X;
	float Y;
	Color color;
};

typedef struct Pixel Pixel;

void print_pixel(Pixel p)
{
	puts("Pixel Location");
	printf("X:%2f, Y:%2f\n", p.X, p.Y);
	puts("Pixel color");
	printf("rgb(%d, %d, %d)\n", p.color.Red, p.color.Green, p.color.Blue);
}

int main(int argc, char const *argv[])
{
	//In C the compiler places structs in a different namespace
	//This requires us to use the struct keyword to have the compiler look up struct definitions
	//like so
	//struct Pixel p;
	//struct Color c;
	// but we can instead introduce the structs via typedefs and leave off the struct keyword
	//Also we can initialize structs with the following
	Color c = {255, 128, 0};
	Pixel p = {10.0f, 20.0f, c};
	// Color c = { 255, 128 }; //Trailing members are zero initialized

	printf("Just so you know you're 3 byte struct for Color will be padded. Padded size in bytes: %d\n", (int)sizeof(Color));
	printf("Size of Pixel: %d\n", (int)sizeof(Pixel));

	//We can access members of structs via dot notation like so
	float x = p.X;
	//We can use assignment to update a member directly
	c.Blue = 255;
	Pixel o = {12.0f, 22.0f, c};

	print_pixel(p);
	print_pixel(p);

	return 0;
}