07. Vending Machine

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

namespace _7.Vending_Machine
{
    class Program
    {
        static void Main(string[] args)
        {

            string Coint = Console.ReadLine();
            double totalMoney = 0;
            double moneyProduct = 0;


            while (Coint != "Start")
            {

                if (Coint == "0.1" ||
                    Coint == "0.2" ||
                    Coint == "0.5" ||
                    Coint == "1" ||
                    Coint == "2")
                {
                    totalMoney += double.Parse(Coint);
                }
                else
                {
                    Console.WriteLine($"Cannot accept {Coint}");
                }

                Coint = Console.ReadLine();

            }

            string Product = Console.ReadLine();

            while (Product != "End")
            {

                switch (Product)
                {
                    case "Nuts":
                        moneyProduct = 2.0;
                        break;
                    case "Water":
                        moneyProduct = 0.7;
                        break;
                    case "Crisps":
                        moneyProduct = 1.5;
                        break;
                    case "Soda":
                        moneyProduct = 0.8;
                        break;
                    case "Coke":
                        moneyProduct = 1.0;
                        break;

                    default:
                        Console.WriteLine("Invalid product");
                        break;
                }

            if (totalMoney >= moneyProduct && moneyProduct>0)
                {
                    Console.WriteLine($"Purchased {Product.ToLower()}");
                    totalMoney -= moneyProduct;

                }
            else if (moneyProduct > 0)
                {
                    Console.WriteLine("Sorry, not enough money");

                }
                moneyProduct = 0;
                Product = Console.ReadLine();
            }

            Console.WriteLine($"Change: {totalMoney:f2}");


        }
    }
}