#include <stdio.h>
#include "glob.h"

// function prototype
double cvt_feet_to_meters(double feet);
double cvt_meters_to_feet(double meters);
void prob_01();
void prob_02();
void prob_03();

int main()
{
  printf("c output chapter 1\n"); 
  prob_01();
  prob_02();
  prob_03();
}

void prob_01()
{
  double my_height_meters;
  double my_height_feet;

  printf("Problem 1\n");

  scanf("%lf",&my_height_feet); // read from stdin
  my_height_meters = cvt_feet_to_meters(my_height_feet); // convert units
  printf("my_height_feet = %6.3f\n",my_height_feet); 
  printf("my_height_meters = %6.3f\n",my_height_meters);
}

void prob_02()
{
  double diff_meters;
  double diff_yards;
  
  diff_meters = 100.0 - cvt_feet_to_meters(100.0 * 3.0);
  diff_yards = cvt_meters_to_feet(diff_meters) / 3.0;

  printf("Problem 2\n");
  printf("100 meters is longer by %10.8f meters or %10.8f yards\n",diff_meters,diff_yards);
}

void prob_03()
{
  printf("Problem 3\n");
  printf("300 kilometers = %10.8f miles\n", 300.0 * miles_per_kilometer);
}




double cvt_feet_to_meters(double feet)
{
  double meters;

  meters = feet * meter_per_foot;
  return meters;
}
double cvt_meters_to_feet(double meters)
{
  double feet;

  feet = meters * feet_per_meter;
  return feet;
}