Beginning Programming - Body Class

// Example of Object Oriented Programming using the Human Body as the base.
// Written by Auri A. Rahimzadeh, February 28, 2015, @auri on Twitter, Take classes at: http://www.elevenfifty.com

using System;
using System.Collections.Generic;

class Body {
    // Body status.
    bool _isAlive = true;
    bool _hasToPoop = false;
    bool _hasToPee = false;
    bool _isHungry = true;
    bool _isThirsty = true;

    int _bladderLevel = 0;
    int _stomachLevel = 0;

    // Body details.
    string _firstName = null;
    string _lastName = null;
    GenderType _gender = GenderType.Undefined;

    // Custom Types
    public enum GenderType {
        Male,
        Female,
        Undefined
    }

    // Properties

    public bool IsThirsty {
        get {
            return _isThirsty;
        }
    }

    public bool IsHungry { get { return _isHungry; } }

    public bool HasToPoop { get { return _hasToPoop; } }

    public bool HasToPee { get { return _hasToPee; } }

    public GenderType Gender { get { return _gender; } }

    public string FirstName {
        get {
            return _firstName;
        }
        set {
            if (!String.IsNullOrWhiteSpace(value)) _firstName = value.Trim();
            else throw new ArgumentException("First name cannot be blank.");
        }
    }

    public string LastName {
        get {
            return _lastName;
        }
        set {
            if (!String.IsNullOrWhiteSpace(value)) _lastName = value.Trim();
            else throw new ArgumentException("Last name cannot be blank.");
        }
    }

    // Constructors

    public Body(string firstName, string lastName) {
        this.FirstName = firstName;
        this.LastName = lastName;
    }

    public Body(string firstName, string lastName, GenderType gender) {
        this.FirstName = firstName;
        this.LastName = lastName;
        this._gender = gender;
    }

    // Bodily Functions

    public bool Eat() {
        if (_stomachLevel <= 3) {
            _stomachLevel += 1;
            Console.WriteLine("Ok, I've eaten. Thanks for that.");
            return true;
        }
        else {
            _hasToPoop = true;
            Console.WriteLine("Sorry, I'm full. Maybe I should do something about that.");
            return false;
        }
    }

    public bool Drink() {
        if (_bladderLevel <= 5) {
            _bladderLevel += 1;
            Console.WriteLine("Ok, I'drank. Thanks for that.");
            return true;
        }
        else {
            _hasToPee = true;
            Console.WriteLine("Sorry, I'm full. Maybe I should do something about that.");
            return false;
        }
    }

    public bool Pee() {
        if (HasToPee) {
            _bladderLevel = 0;
            _hasToPee = false;
            Console.WriteLine("Phew, I'm relieved!");
            return true;
        }
        else {
            Console.WriteLine("I don't have to pee.");
            return false;
        }
    }

    public bool Poop() {
        if (HasToPoop) {
            _stomachLevel = 0;
            _hasToPoop = false;
            Console.WriteLine("Phew, I'm a few pounds lighter!");
            return true;
        }
        else {
            Console.WriteLine("I don't have to poop.");
            return false;
        }
    }

    public void Fart() {
        throw new NotImplementedException("Cannot call this on the base class.");
    }
}

class Child : Body
{
    public bool IsInSchool { get; private set; }

    public new void Fart() {
        Console.WriteLine("::giggles::");
    }

    public Child(string firstName, string lastName) : base (firstName, lastName) {
        // nothing else to do here
    }

}

class Adult : Body
{
    public bool IsEmployed { get; private set; }

    public new void Fart() {
        Console.WriteLine("Fbbbbbbbbbbbbbbbbbbbbtttttttttttttttttt! Excuse me! ((pew!))");
    }

    public Adult(string firstName, string lastName) : base (firstName, lastName) {
        // nothing else to do here
    }

}

var Mom = new Adult("Karen", "Cohn");
var Daishaun = new Child("Daishaun", "Rahimzadeh");
var Duke = new Adult("Duke","Poopington");

Daishaun.Fart();
Mom.Fart();

Daishaun.Drink();
Mom.Poop();

bool IsHealthOk(Body person) {
    Console.WriteLine("Went to the doctor. Everything is fine.");
    if (person is Child) (person as Child).Fart();
    else if (person is Adult) (person as Adult).Fart();
    return true;
}

IsHealthOk(Daishaun);
IsHealthOk(Mom);






// *******************************************************************************************
// *                                         LISTS!                                          *
// *******************************************************************************************

var listOfPeople = new List<Body>();
Console.WriteLine("Total number of people: " + listOfPeople.Count);
listOfPeople.Add(new Child("Joe", "Schmoe"));
listOfPeople.Add(new Adult("Auri", "Rahimzadeh"));
listOfPeople.Add(new Adult("Karen", "Cohn"));
listOfPeople.Add(new Child("Scott", "Jones"));
listOfPeople.Add(new Child("Daishaun", "Rahimzadeh"));
listOfPeople.Add(new Adult("Duke", "Poopington"));
listOfPeople.Add(new Adult("Steve", "Wozniak"));
Console.WriteLine("Total number of people: " + listOfPeople.Count);