/* 
 * First example: shapes
 * 2. Modularized, uses typedefs, but still in C
 *
 * RunStuff:: gcc THISFILE
 */

#include <stdio.h>

/*
 * Type definitions
 */
typedef struct { 
	int x, y, wid, ht; 
} Rect; 

typedef struct { 
	int x, y, rad; 
} Circle; 

/*
 * Data definitions
 */
Rect r1, r2; 
Circle c1; 

/* 
 * Procedure definitions
 */
void drawRect (Rect r) { 
	printf ("Drawing rectangle at %d, %d, %d, %d\n", r.x, r.y, r.wid, r.ht);
}

void drawCircle (Circle c) { 
	printf ("Drawing circle at %d, %d, radius = %d\n", c.x, c.y, c.rad);
}

float areaRect (Rect r) { 
	return (float) (r.wid * r.ht);
}

float areaCircle (Circle c) { 
	return (float) (c.rad * c.rad * 3.14159);
}

int main () {
	/*
	 * Set the locations of the 3 objects
	 */
	r1.x = 10; r1.y = 10; 
	r1.wid = 50; r1.ht = 50; 

	r2.x = 80; r2.y = 10; 
	r2.wid = 10; r2.ht = 100; 

	c1.x = 35; c1.y = 90; 
	c1.rad = 10; 

	/*
	 * Draw them
	 */
	drawRect (r1); 
	drawRect (r2); 
	drawCircle (c1); 

	/*
	 * Compute and print total area
	 */
	printf ("Total area = %f\n",
		areaRect (r1) + areaRect (r2) + areaCircle (c1)); 

	return 0;
}