Head First C#

Head First C# Code: Chapter 5
Dinner Party
DinnerParty.cs

 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace __DinnerParty
{
    public class DinnerParty
    {
        const int CostOfFoodPerPerson = 25;

        private int numberOfPeople;
        public int NumberOfPeople {
            get { return numberOfPeople; }
            set
            {
                numberOfPeople = value;
                CalculateCostOfDecorations(fancyDecorations);
            }
        }
        private bool fancyDecorations;

        public decimal CostOfBeveragesPerPerson;
        public decimal CostOfDecorations = 0;

        public DinnerParty(int numberOfPeople, bool healthyOption, bool fancyDecorations)
        {
            this.NumberOfPeople = numberOfPeople;
            this.fancyDecorations = fancyDecorations;
            SetHealthyOption(healthyOption);
            CalculateCostOfDecorations(fancyDecorations);
        }

        public void SetHealthyOption(bool healthyOption)
        {
            if (healthyOption)
            {
                CostOfBeveragesPerPerson = 5.00M;
            }
            else
            {
                CostOfBeveragesPerPerson = 20.00M;
            }
        }

        public void CalculateCostOfDecorations(bool fancy)
        {
            fancyDecorations = fancy;
            if (fancy)
            {
                CostOfDecorations = (NumberOfPeople * 15.00M) + 50M;
            }
            else
            {
                CostOfDecorations = (NumberOfPeople * 7.50M) + 30M;
            }
        }

        public decimal CalculateCost(bool healthyOption)
        {
            decimal totalCost = CostOfDecorations + ((CostOfBeveragesPerPerson + CostOfFoodPerPerson) * NumberOfPeople);

            if (healthyOption)
            {
                return totalCost * .95M;
            }
            else
            {
                return totalCost;
            }
        }
    }
}