int main (void)
{
double area (double r), circumference (double r),
volume (double r);
printf ("radius = 1: %.4f %.4f %.4f\n",
area(1.0), circumference(1.0), volume(1.0));
printf ("radius = 4.98: %.4f %.4f %.4f\n",
area(4.98), circumference(4.98), volume(4.98));
return 0;
}
int main (void)
{
// Get the size of the pizza from the user
printf("What's the diameter of the pizza? ");
float pizza_diameter = GetFloat();
float pizza_circumference = circumference(pizza_diameter);
float pizza_area = area( pizza_diameter / 2.0 );
printf("The pizza is %f inches around.\n", pizza_circumference);
printf("The pizza has %f square inches.\n", pizza_area);
}
double cylinderLateralArea(const Cylinder* c)
{
if (!c || c->radius < 0 || c->height < 0) { return -1; }
return circumference(c->radius) * c->height;
}
