IBankAccount 未包含TransferTo的定义，出现在图片中的一个错误
问题
-
using System;
using System.Collections.Generic;
//using System.Linq;
using System.Text;
//using System.Threading.Tasks;
using ProCSharp;
using VenusBank;
using JupiterBank;
using Current;
namespace ProCSharp
{
public interface IBankAccount
{
void PayIn(decimal amount);
bool Withdraw(decimal amount);
decimal Balance
{
get;
}
}
public interface ITransferBankAccount : IBankAccount
{
bool TransferTo(IBankAccount destination,decimal amount);
}
/*public class CurrentAccount : ITransferBankAccount
{
private decimal balance;
public void PayIn(decimal amount)
{
balance += amount;
}
public bool Withdraw(decimal amount)
{
if(balance>=amount)
{
balance -= amount;
return true;
}
Console.WriteLine("Withdraw attempt failed 取出失败");
return false;
}
public decimal Balance
{
get
{
return balance;
}
}
public bool TransferTo(IBankAccount destination, decimal amount)
{
bool result;
if ((result = Withdraw(amount)) == true)
destination.PayIn(amount);
return result;
}
public override string ToString()
{
return String.Format("Jupiter Bank Current Account:Balance={0,6:c} 朱比特银行的现有账户有{1,6:c}", balance,balance);
}
}*/
class MainEntryPoint
{
static void Main()
{
IBankAccount venusAccount = new SaverAccount(); //using VenusBank; 语句不用后，这个运行不了
IBankAccount jupiterAccount = new CurrentAccount(); //using JupiterBank; 语句不用后，这个运行不了
venusAccount.PayIn(200);
jupiterAccount.PayIn(500);
jupiterAccount.TransferTo(venusAccount,100);
Console.WriteLine(venusAccount.ToString());
Console.WriteLine(jupiterAccount.ToString());
Console.ReadLine();
}
}
}
namespace VenusBank
{
public class SaverAccount : IBankAccount
{
private decimal balance;
public void PayIn(decimal amount)
{
balance += amount;
}
public bool Withdraw(decimal amount)
{
if (balance >= amount)
{
balance -= amount;
return true;
}
Console.WriteLine("withdraw attempt failed. 取款失败"); //钱不够，取不出
return false;
}
public decimal Balance
{
get
{
return balance;
}
}
public override string ToString()
{
return String.Format("VenusBank Saver : Balance = {0,6:C}", balance);
}
}
}
namespace JupiterBank //书上写成ProCSharpJupiterBank，搞到ToString没法重写
{
public class GoldAccount : IBankAccount
{
private decimal balance;
public void PayIn(decimal amount)
{
balance += amount;
}
public bool Withdraw(decimal amount)
{
if (balance >= amount)
{
balance -= amount;
return true;
}
Console.WriteLine("withdraw attempt failed. 取款失败"); //钱不够，取不出
return false;
}
public decimal Balance
{
get
{
return balance;
}
}
public override string ToString()
{
return String.Format("JupiterBank Saver : Balance = {0,6:C}", balance);
}
}
}
namespace Current
{
public class CurrentAccount : ITransferBankAccount
{
private decimal balance;
public void PayIn(decimal amount)
{
balance += amount;
}
public bool Withdraw(decimal amount)
{
if (balance >= amount)
{
balance -= amount;
return true;
}
Console.WriteLine("Withdraw attempt failed 取出失败");
return false;
}
public decimal Balance
{
get
{
return balance;
}
}
public bool TransferTo(IBankAccount destination, decimal amount)
{
bool result;
if ((result = Withdraw(amount)) == true)
destination.PayIn(amount);
return result;
}
public override string ToString()
{
return String.Format("Jupiter Bank Current Account:Balance={0,6:c} 朱比特银行的现有账户有{1,6:c}", balance, balance);
}
}
}
