// *********************************************************************
// Description: Land Area
// *********************************************************************

#include <iostream>                 //Preprocessor directive to be able to use cout.
#include <iomanip>                  //Preprocessor directive to be able to use setprecision.
#include <fstream>                  //Preprocessor directive to be ablt to output to file.

using namespace std;                //Uses standard namespace.

//Function prototypes
void showMenu();
float getFeet();
float getMiles();
float getYards();
float getFurlong();
void printOut(float);

int main ()                         //Main function

{
    int choice;                     //To hold menu choice

    //Constants for the menu choice
    const int FEET_CHOICE = 1,
              MILES_CHOICE = 2,
              YARDS_CHOICE = 3,
              FURLONG_CHOICE = 4,
              QUIT_CHOICE = 5;

    do
    {
        //Display menu and get user's choice
        showMenu();
        cin >> choice;

        //Validate menu selection
        while (choice < FEET_CHOICE || choice > QUIT_CHOICE)
        {
            cout << "Please entere a valid menu choice:";
            cin >> choice;
        }

        if (choice != QUIT_CHOICE)
        {
            switch(choice)
            {
                case FEET_CHOICE:
                    printOut(getFeet());
                    break;
                case MILES_CHOICE:
                    printOut(getMiles());
                    break;
                case YARDS_CHOICE:
                    printOut(getYards());
                    break;
                case FURLONG_CHOICE:
                    printOut(getFurlong());
                    break;
            }
        }
    } while (choice != QUIT_CHOICE);

    return 0;
}

//*************************************************************
// Definition of function showMenu which displays the menu.   *
//*************************************************************
void showMenu()
{
cout << "\n\t\tMenu\n\n"
     << "1. Input Feet\n"
     << "2. Input Miles\n"
     << "3. Input Yards\n"
     << "4. Input Furlong\n"
     << "5. Quit\n"
     << "Enter your choice: ";
}

//**************************************************************
// Definition of function getFeet which gets length and width. *
//**************************************************************
float getFeet()
{
float width;
float length;

cout << "\nPlease input width in feet: ";
cin >> width;

cout << "\nPlease input length in feet: ";
cin >> length;

fstream outputFile;
outputFile.open("LandAreaOutput.txt", ios::out | ios::app);

outputFile << "Width of " << width << " feet and length of " << length << " feet is ";

outputFile.close();

return (width*length);
}

//**************************************************************
// Definition of function getMiles which gets length and width.*
//**************************************************************
float getMiles()
{
float width;
float length;

cout << "\nPlease input width in miles: ";
cin >> width;

cout << "\nPlease input length in miles: ";
cin >> length;

fstream outputFile;
outputFile.open("LandAreaOutput.txt", ios::out | ios::app);

outputFile << "Width of " << width << " miles and length of " << length << " miles is ";

outputFile.close();

return (width*length*27878400);
}

//**************************************************************
// Definition of function getYards which gets length and width.*
//**************************************************************
float getYards()
{
float width;
float length;

cout << "\nPlease input width in yards: ";
cin >> width;

cout << "\nPlease input length in yards: ";
cin >> length;

fstream outputFile;
outputFile.open("LandAreaOutput.txt", ios::out | ios::app);

outputFile << "Width of " << width << " yards and length of " << length << " yards is ";

outputFile.close();

return (width*length*9);
}

//****************************************************************
// Definition of function getFurlong which gets length and width.*
//****************************************************************
float getFurlong()
{
float width;
float length;

cout << "\nPlease input width in furlongs: ";
cin >> width;

cout << "\nPlease input length in furlongs: ";
cin >> length;

fstream outputFile;
outputFile.open("LandAreaOutput.txt", ios::out | ios::app);

outputFile << "Width of " << width << " furlongs and length of " << length << " furlongs is ";

outputFile.close();

return (width*length*435600);
}

//**************************************************************
// Definition of function feetOut which outputs conversions   .*
//**************************************************************
void printOut(float sqFeet)
{
fstream outputFile;
outputFile << fixed << showpoint;
outputFile << setprecision(2);
outputFile.open("LandAreaOutput.txt", ios::out | ios::app);

outputFile << sqFeet << " sq feet, " << sqFeet/43560 << " Eng acres, "
           << sqFeet/55321 << " Scot acres, " << sqFeet/70560 << " Irish acres, "
           << sqFeet/107639 << " Hectares, " << sqFeet/26910 << " Morgen (metric), "
           << sqFeet/5227200 << " Hides(std). " << "\n";

outputFile.close();

}