testsavingsaccounts.cs

yongle jpscxsd j cxksk xdkl sna

using System;

namespace Example_1
{
	class SavingsAccount
	{
		//用于存储帐户号码、余额和已获利息的类字段。
		private int _accountNumber;
		private double _balance;
		private double _interestEarned;
		
		// 利率是静态的，因为所有的帐户都使用相同的利率
		private static double _interestRate;

		// 构造函数初始化类成员
		public SavingsAccount(int accountNumber, double balance)
		{
			this._accountNumber = accountNumber;
			this._balance       = balance;
		}

		// AccountNumber只读属性
		public int AccountNumber
		{
			get
			{
				return _accountNumber;
			}
		}

		// Balance 只读属性
		public double Balance
		{
			get
			{
				if (_balance < 0)
					Console.WriteLine("无余额");
				return _balance;
			}
		}

		// InterestEarned 读/写属性
		public double InterestEarned
		{
			get
			{
				return _interestEarned;
			}

			set
			{
				// 验证数据
				if (value < 0.0)
				{
					Console.WriteLine("InterestEarned 不能为负数");
					return;
				}
				_interestEarned = value;
			}
		}

		// InterestRate 读/写属性为静态，
		// 因为所有特定类型的帐户都具有相同的利率
		public static double InterestRate
		{
			get
			{
				return _interestRate;
			}

			set
			{
				// 验证数据
				if (value < 0.0)
				{
					Console.WriteLine("InterestRate 不能为负数");
					return;
				}
				else
				{
					_interestRate = value / 100;
				}
			}
		}
	}
	

	class TestSavingsAccount
	{
		/// <摘要>
		/// 应用程序的主入口点。
		/// </摘要>
		[STAThread]
		static void Main(string[] args)
		{
			// 创建 SavingsAccount 的对象
			SavingsAccount objSavingsAccount = new SavingsAccount(12345, 5000);;
			// 用户交互
			Console.WriteLine("输入到现在为止已获得的利息和利率");
			objSavingsAccount.InterestEarned = Int64.Parse(Console.ReadLine());
			SavingsAccount.InterestRate = Int64.Parse(Console.ReadLine());
			
			// 使用类名访问静态属性
			objSavingsAccount.InterestEarned += objSavingsAccount.Balance * SavingsAccount.InterestRate;
			Console.WriteLine("获得的总利息为： {0}", objSavingsAccount.InterestEarned);
		}
	}
}