/******************************************************************************
  Lab Exercise #4 -- Implementation of support function
******************************************************************************/

using namespace std;

#include <iostream>
#include <cfloat>

void ConvertLength( double&, char, char );

/*-----------------------------------------------------------------------------
   Name:  ConvertLength

   Purpose:  Convert measurements from the English to the metric system
   Receive:  A measurement, its unit in the English system, and the unit
     in the metric system for the conversion
   Return:   The measurement in the metric system
-----------------------------------------------------------------------------*/

void ConvertLength( double& Value, char In, char Out )
{
  double Centimeters;    // Intermediate calculation -- length in centimeters

  switch (In)
  {
    // English unit is inches
    case 'I':
      Centimeters = Value * 2.54001;
      break;

    // English unit is feet
    case 'F':
      Centimeters = Value * 30.4801;
      break;

    // English unit is yards
    case 'Y':
      Centimeters = Value * 91.4402;
      break;

    // English unit is miles
    case 'M':
      Centimeters = Value * 160935.0;
      break;

    // English unit is not recognized
    default:
      cerr << "\n*** invalid English unit of measure ***\n\n";
      Centimeters = DBL_MAX;
      break;
  }

  switch (Out)
  {
    // Metric unit is centimeters (NOT COMPLETED)
    case 'C':
      break;

    // Metric unit is meters (NOT COMPLETED)
    case 'M':
      break;

    // Metric unit is kilometers (NOT COMPLETED)
    case 'K':
      break;

    // Metric unit is not recognized
    default:
      cerr << "\n*** invalid metric unit of measure ***\n\n";
      Value = DBL_MAX;

      break;
  }
}