OOP LV7 - Zadatak1

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

namespace LV7___Zadatak_1
{
    class Program
    {
        static void Main(string[] args)
        {
            List<IPayable> list = new List<IPayable>();
            BankAccount B1 = new BankAccount("Enio", 1000, 0.0);
            BankAccount B2 = new BankAccount("Petar", 2000, 500);
            MobileAccount P1 = new MobileAccount("0992051444", 2.5, 50);
            MobileAccount P2 = new MobileAccount("0976432454", 1.4, 100);

            list.Add(B1);
            list.Add(B2);
            list.Add(P1);
            list.Add(P2);

            Random rnd = new Random();
            foreach (IPayable account in list)
            {
                account.SendPayment(rnd.Next(10, 100));
            }
            foreach (IPayable account in list)
            {
                account.RequestPayment(rnd.Next(1, 100));
            }
            foreach (IPayable account in list)
            {
                Console.WriteLine("Balance: " + account.GetBalance() + "$");
            }
        }
    }

    interface IPayable
    {
        double GetBalance();
        void SendPayment(double payment);
        void RequestPayment(double payment);
    }

    public class BankAccount : IPayable
    {
        private string mName;
        private double mLimit;
        private double mBalance;

        public BankAccount(string name, double limit, double balance)
        {
            this.mName = name;
            this.mLimit = limit;
            this.mBalance = balance;
        }

        public double GetBalance()
        {
            return this.mBalance;
        }

        public void SendPayment(double payment)
        {
            this.mBalance += payment;
        }

        public void RequestPayment(double payment)
        {
            double balance = this.mBalance;

            balance -= payment;

            if (balance > mLimit)
            {
                this.mBalance += payment;
            }
            else
            {
                Console.WriteLine("Error!");
            }
        }
    }

    public class MobileAccount : IPayable
    {
        private string mNumber;
        private double mPrice;
        private double mBalance;

        public MobileAccount(string number, double price, double balance)
        {
            this.mNumber = number;
            this.mPrice = price;
            this.mBalance = balance;
        }

        public double GetBalance()
        {
            return this.mBalance;
        }

        public void SendPayment(double payment)
        {
            this.mBalance += payment;
        }

        public void RequestPayment(double payment)
        {
            double balance = this.mBalance;

            balance -= payment;

            if (balance > 0)
            {
                this.mBalance += payment;
            }
            else
            {
                Console.WriteLine("Error!");
            }
        }
    }
}