/*
#AUTHOR:  David C.
#SITE:    www.phear-gaming.net
#EMAIL:   crippler@phear-gaming.net
#IRC:     irc://irc.gamesurge.net:6667/phear
#PURPOSE: Distance conversions.
*/
#include <iostream>
using namespace std;

void centToInch();
void input_centToInch(double &centimeters);
void convert_centToInch(double &centimeters, double &inches);
void output_centToInch(double centimeters, double inches);

void inchToCent();
void input_inchToCent(double &inches);
void convert_inchToCent(double &inches, double &centimeters);
void output_inchToCent(double centimeters, double inches);

void kiloToMile();
void input_kiloToMile(double &kilometers);
void convert_kiloToMile(double &kilometers, double &miles);
void output_kiloToMile(double kilometers, double miles);

void mileToKilo();
void input_mileToKilo(double miles);
void convert_mileToKilo(double &miles, double &kilometers);
void output_mileToKilo(double miles, double kilometers);

void meterToFeet();
void input_meterToFeet(double meters);
void convert_meterToFeet(double &meters, double &feet);
void output_meterToFeet(double meters, double feet);

void feetToMeter();
void input_feetToMeter(double &feet);
void convert_feetToMeter(double &feet, double &meters);
void output_feetToMeter(double feet, double meters);

void feetToInch();
void input_feetToInch(double &feet);
void convert_feetToInch(double &feet, double &inches);
void output_feetToInch(double feet, double inches);

void feetToYards();
void input_feetToYards(double &feet);
void convert_feetToYards(double &feet, double &yards);
void output_feetToYards(double feet, double yards);

void meterToYard();
void input_meterToYard(double &meters);
void convert_meterToYard(double &meters, double &yards);
void output_meterToYard(double meters, double yards);

void milesToFeet();
void input_milesToFeet(double &miles);
void convert_milesToFeet(double &miles, double &feet);
void output_milesToFeet(double miles, double feet);

void milesToYard();
void input_milesToYard(double &miles);
void convert_milesToYard(double &miles, double &yards);
void output_milesToYard(double miles, double yards);

const double CENT_TO_INCH_FACTOR  = 0.3973;
const double INCH_TO_CENT_FACTOR  = 2.540;
const double KILO_TO_MILE_FACTOR  = 0.621;
const double MILE_TO_KILO_FACTOR  = 1.609;
const double METER_TO_FEET_FACTOR = 3.281;
const double FEET_TO_METER_FACTOR = 0.3048;
const double FEET_TO_INCH_FACTOR  = 12.00;
const double FEET_TO_YARDS_FACTOR = 0.3333;
const double METER_TO_YARD_FACTOR = 1.093;
const double MILES_TO_FEET_FACTOR = 5280;
const double MILES_TO_YARD_FACTOR = 1760;

int main(void)
{
    int  which;
    char again;

    cout << "  C++ Distance Conversion Tool _ Version 1.0     \n"
    << "NOTE: Every unit entered will take up 8 bytes.      \a\n"
    << "      (No more than 15 decimal places.)               \n"
    << endl;
    do
    {
        cout << "Pick a conversion;    \n"
        << " (0) Quit the Program.     \n"
        << " (1) Centimeters to Inches.\n"
        << " (2) Inches to Centimeters.\n"
        << " (3) Kilometers to Miles.  \n"
        << " (4) Miles to Kilometers.  \n"
        << " (5) Meters to Feet.       \n"
        << " (6) Feet to Meters.       \n"
        << " (7) Feet to Inches.       \n"
        << " (8) Feet to Yards.        \n"
        << " (9) Meters to Yards.      \n"
        << "(10) Miles to Feet.        \n"
        << "(11) Miles to Yards.       \n"
        << "Choice: ";
        cin >> which;
        cout << endl;

        if       (which == 0)
            break;
        else if  (which == 1)
            centToInch();
        else if  (which == 2)
            inchToCent();
        else if  (which == 3)
            kiloToMile();
        else if  (which == 4)
            mileToKilo();
        else if  (which == 5)
            meterToFeet();
        else if  (which == 6)
            feetToMeter();
        else if  (which == 7)
            feetToInch();
        else if  (which == 8)
            feetToYards();
        else if  (which == 9)
            meterToYard();
        else if (which == 10)
            milesToFeet();
        else if (which == 11)
            milesToYard();
        else
            cout << "\a" << which << " is not a valid choice. Pick again.\n";

        cout << "Do want to do any of the other conversions? (y or n): ";
        cin >> again;
        cout << endl;

    }
    while (again == 'y' || again == 'Y');
    cout << "EOF: End Of File!\n";
}

void centToInch()
{
    double centimeters = 0.00;
    double      inches = 0.00;
    char                again;
    do
    {
        input_centToInch(centimeters);
        convert_centToInch(centimeters, inches);
        output_centToInch(centimeters, inches);
        cout << "\nDo you want to do another conversion of centimeters to inches? (y or n): ";
        cin >> again;
    }
    while (again == 'y' || again == 'Y');

}
void input_centToInch(double &centimeters)
{
    cout << "Enter the number of centimeters: ";
    cin  >> centimeters;

}
void convert_centToInch(double &centimeters, double &inches)
{
    inches = centimeters * CENT_TO_INCH_FACTOR;
}
void output_centToInch(double centimeters, double inches)
{
    cout.setf(ios::showpoint);
    cout.setf(ios::fixed);
    cout.precision(1);
    cout << centimeters << " centimeters converts to " << inches << " inches.";
}

void inchToCent()
{
    double      inches = 0.00;
    double centimeters = 0.00;
    char                again;
    do
    {
        input_inchToCent(inches);
        convert_inchToCent(inches, centimeters);
        output_inchToCent(inches, centimeters);
        cout << "\nDo another conversion of inches to centimeters? (y or n): ";
        cin >> again;

    }
    while (again == 'y' || again == 'Y');
}
void input_inchToCent(double &inches)
{
    cout << "Enter the number of inches: ";
    cin >> inches;

}
void convert_inchToCent(double &inches, double &centimeters)
{
    centimeters = inches * INCH_TO_CENT_FACTOR;
}
void output_inchToCent(double inches, double centimeters)
{
    cout.setf(ios::showpoint);
    cout.setf(ios::fixed);
    cout.precision(1);
    cout << inches << " inches converts to " << centimeters << " centimeters.";
}

void kiloToMile()
{
    double kilometers = 0.00;
    double      miles = 0.00;
    char               again;
    do
    {
        input_kiloToMile(kilometers);
        convert_kiloToMile(kilometers, miles);
        output_kiloToMile(kilometers, miles);
        cout << "\nDo another conversion of kilometers to miles? (y or n): ";
        cin >> again;

    }
    while (again == 'y' || again == 'Y');
}
void input_kiloToMile(double &kilometers)
{
    cout << "Enter the number of kilometers: ";
    cin >> kilometers;

}
void convert_kiloToMile(double &kilometers, double &miles)
{
    miles = kilometers * KILO_TO_MILE_FACTOR;
}
void output_kiloToMile(double kilometers, double miles)
{
    cout.setf(ios::showpoint);
    cout.setf(ios::fixed);
    cout.precision(1);
    cout << kilometers << " kilometers converts to " << miles << " miles.";
}

void mileToKilo()
{
    double      miles = 0.00;
    double kilometers = 0.00;
    char               again;
    do
    {
        input_mileToKilo(miles);
        convert_mileToKilo(miles, kilometers);
        output_mileToKilo(miles, kilometers);
        cout << "\nDo another conversion of miles to kilometers? (y or n): ";
        cin >> again;
    }
    while (again == 'y' || again == 'Y');
}
void input_mileToKilo(double miles)
{
    cout << "Enter the number of miles: ";
    cin >> miles;

}
void convert_mileToKilo(double &miles, double &kilometers)
{
    kilometers = miles * MILE_TO_KILO_FACTOR;
}
void output_mileToKilo(double miles, double kilometers)
{
    cout.setf(ios::showpoint);
    cout.setf(ios::fixed);
    cout.precision(1);
    cout << miles << " miles converts to " << kilometers << " kilometers";
}

void meterToFeet()
{
    double meters = 0.00;
    double   feet = 0.00;
    char           again;
    do
    {
        input_meterToFeet(meters);
        convert_meterToFeet(meters, feet);
        output_meterToFeet(meters, feet);
        cout << "\nDo another conversion of meters to feet? (y or n): ";
        cin >> again;

    }
    while (again == 'y' || again == 'Y');
}
void input_meterToFeet(double meters)
{
    cout << "Enter the number of meters: ";
    cin >> meters;
}
void convert_meterToFeet(double &meters, double &feet)
{
    feet = meters * METER_TO_FEET_FACTOR;
}
void output_meterToFeet(double meters, double feet)
{
    cout.setf(ios::showpoint);
    cout.setf(ios::fixed);
    cout.precision(1);
    cout << feet << " feet converts to " << meters << " meters.";
}

void feetToMeter()
{
    double meters = 0.00;
    double   feet = 0.00;
    char           again;
    do
    {
        input_feetToMeter(feet);
        convert_feetToMeter(feet, meters);
        output_feetToMeter(feet, meters);
        cout << "\nDo another conversion of feet to meters? (y or n): ";
        cin >> again;

    }
    while (again == 'y' || again == 'Y');
}
void input_feetToMeter(double &feet)
{
    cout << "Enter the number of feet: ";
    cin >> feet;
}
void convert_feetToMeter(double &feet, double &meters)
{
    meters = feet * FEET_TO_METER_FACTOR;
}
void output_feetToMeter(double feet, double meters)
{
    cout.setf(ios::showpoint);
    cout.setf(ios::fixed);
    cout.precision(1);
    cout << feet << " feet converts to " << meters << " meters";
}

void feetToInch()
{
    double   feet = 0.00;
    double inches = 0.00;
    char           again;
    do
    {
        input_feetToInch(feet);
        convert_feetToInch(feet, inches);
        output_feetToInch(feet, inches);
        cout << "\nDo another conversion of feet to inches? (y or n): ";
        cin >> again;

    }
    while (again == 'y' || again == 'Y');
}
void input_feetToInch(double &feet)
{
    cout << "Enter the number of feet: ";
    cin >> feet;
}
void convert_feetToInch(double &feet, double &inches)
{
    inches = feet * FEET_TO_INCH_FACTOR;
}
void output_feetToInch(double feet, double inches)
{
    cout.setf(ios::showpoint);
    cout.setf(ios::fixed);
    cout.precision(1);
    cout << feet << " feet converts to " <<  inches << " inches.";
}

void feetToYards()
{
    double  feet = 0.00;
    double yards = 0.00;
    char          again;
    do
    {
        input_feetToYards(feet);
        convert_feetToYards(feet, yards);
        output_feetToYards(feet, yards);
        cout << "\nDo another conversion of feet to yards? (y or n): ";
        cin >> again;

    }
    while (again == 'y' || again == 'Y');
}
void input_feetToYards(double &feet)
{
    cout << "Enter the number of feet: ";
    cin >> feet;
}
void convert_feetToYards(double &feet, double &yards)
{
    yards = feet * FEET_TO_YARDS_FACTOR;
}
void output_feetToYards(double feet, double yards)
{
    cout.setf(ios::showpoint);
    cout.setf(ios::fixed);
    cout.precision(1);
    cout << feet << " feet converts to " << yards << " yards.";
}

void meterToYard()
{
    double meters = 0.00;
    double  yards = 0.00;
    char           again;
    do
    {
        input_meterToYard(meters);
        convert_meterToYard(meters, yards);
        output_meterToYard(meters, yards);
        cout << "\nDo another conversion of meters to yards? (y or n): ";
        cin >> again;
    }
    while (again == 'y' || again == 'Y');
}
void input_meterToYard(double &meters)
{
    cout << "Enter the number of meters: ";
    cin >> meters;
}
void convert_meterToYard(double &meters, double &yards)
{
    yards = meters * METER_TO_YARD_FACTOR;
}
void output_meterToYard(double meters, double yards)
{
    cout.setf(ios::showpoint);
    cout.setf(ios::fixed);
    cout.precision(1);
    cout << meters << " meters converts to " << yards << " yards.";
}

void milesToFeet()
{
    double miles = 0.00;
    double  feet = 0.00;
    char          again;
    do
    {
        input_milesToFeet(miles);
        convert_milesToFeet(miles, feet);
        output_milesToFeet(miles, feet);
        cout << "\nDo another conversion of miles to feet? (y or n): ";
        cin >> again;
    }
    while (again == 'y' || again == 'Y');
}
void input_milesToFeet(double &miles)
{
    cout << "Enter the number of miles: ";
    cin >> miles;
}
void convert_milesToFeet(double &miles, double &feet)
{
    feet = miles * MILES_TO_FEET_FACTOR;
}
void output_milesToFeet(double miles, double feet)
{
    cout.setf(ios::showpoint);
    cout.setf(ios::fixed);
    cout.precision(1);
    cout << miles << " miles converts to " << feet << " feet.";
}

void milesToYard()
{
    double miles = 0.00;
    double yards = 0.00;
    char          again;
    do
    {
        input_milesToYard(miles);
        convert_milesToYard(miles, yards);
        output_milesToYard(miles, yards);
        cout << "\nDo another conversion of miles to yards? (y or n): ";
        cin >> again;
    }
    while (again == 'y' || again == 'Y');
}
void input_milesToYard(double &miles)
{
    cout << "Enter the number of miles: ";
    cin >> miles;
}
void convert_milesToYard(double &miles, double &yards)
{
    yards = miles * MILES_TO_YARD_FACTOR;
}
void output_milesToYard(double miles, double yards)
{
    cout.setf(ios::showpoint);
    cout.setf(ios::fixed);
    cout.precision(1);
    cout << miles << " miles converts to " << yards << " yards.";
}