int
rational_div(struct rational* a, const struct rational* b, const struct rational* c)
{
rational_printf("rational_div");
struct rational d;
return rational_inv(&d, c) && (rational_mult(a, b, &d), 1);
}
void
rational_mult(struct rational* a, const struct rational* b, const struct rational* c)
{
rational_printf("rational_mult");
a->p = (b->p)*(c->p);
a->q = (b->q)*(c->q);
rational_error = RATIONAL_SUCCESS;
}
void
rational_sub(struct rational* a, const struct rational* b, const struct rational* c)
{
struct rational d;
rational_printf("rational_sub");
rational_neg(&d, c);
rational_add(a, b, &d);
}
void
rational_neg(struct rational* a, const struct rational* b)
{
rational_printf("rational_neg");
a->p = - b->p;
a->q = b->q;
rational_error = RATIONAL_SUCCESS;
}
int
rational_inv(struct rational* a, const struct rational* b)
{
rational_printf("rational_inv");
if(b->q == 0)
{
rational_error = RATIONAL_DIVISION_BY_ZERO;
}
else
{
a->p = b->q;
a->q = b->p;
rational_error = RATIONAL_SUCCESS;
}
return (rational_error == RATIONAL_SUCCESS);
}
int
rational_print(const struct rational* a)
{
rational_printf("rational_print");
return printf("%d/%d", a->p, a->q);
}