/* Lab Exploration: Functions */
#include "checkit.h"

/*
 * Computes the REAL circumference of a circle with radius r.
 * Pre:  r is defined and is > 0.
 *       kPi is a constant macro representing an approximation of Pi.
 */
double
find_circum(double r)
{
     return (2.0 * kPi * r);
}


/*
 * Computes the area of a circle with radius r.
 * Pre:  r is defined and is > 0.
 *       kPi is a constant macro representing an approximation of Pi.
 */
double
find_area(double r)
{
     return (kPi * pow(r, 2));
}

/*
 * Perform tests on our functions
 */
void test_cases()
{
   checkit_double(find_circum(0), 0);
}

int main(void)
{
   test_cases();
   return 0;
}