/* 
 * Simple "US money" type -- declaration of type and some functions.
 */

/* 
 * the next two lines avoid problems if file is inadvertently #include'd 
 * twice.  good style even though in this simple examples the problem seems 
 * unlikely.
 */
#ifndef SIMPLE_US_MONEY_H
#define SIMPLE_US_MONEY_H

#include <stdbool.h>
#include <stdio.h>

typedef struct {
	bool is_negative;
	unsigned long dollars;
	unsigned short cents;
} us_money_t;

/* print in some nice format ($dollar.cents, with - if needed) */
void print_money(FILE * f, us_money_t);

/* input money in form dollars.cents */
bool input_money(FILE * f, us_money_t *m);

us_money_t add_money(us_money_t m1, us_money_t m2);

us_money_t subtract_money(us_money_t m1, us_money_t m2);

us_money_t multiply_money(us_money_t m1, double d);

#endif /* end of #ifndef SIMPLE_US_MONEY_H */