package top.qaqaq.java.P279.exer;

public class Account {

	private int id; // 账号
	private double balance; // 余额
	private double annuallntertstRate; // 年利率

	public Account(int id, double balance, double annuallntertstRate) {
		super();
		this.id = id;
		this.balance = balance;
		this.annuallntertstRate = annuallntertstRate;
	}

	public int getId() {
		return id;
	}

	public void setId(int id) {
		this.id = id;
	}

	public double getBalance() {
		return balance;
	}

	public void setBalance(double balance) {
		this.balance = balance;
	}

	public double getAnnuallntertstRate() {
		return annuallntertstRate;
	}

	public void setAnnuallntertstRate(double annuallntertstRate) {
		this.annuallntertstRate = annuallntertstRate;
	}
	
	//月利率
	public double getMonthlyInterest() {
		return annuallntertstRate / 12;
	}
	
	//取款
	public void withdraw(double amount) {
		if(balance >= amount) {
			balance -= amount;
			return;
		}
		
		System.out.println("余额不足！");
	}
	
	//存款
	public void deposit(double amount) {
		if(amount > 0) {
			balance += amount;
			return;
		}
	}

}

package top.qaqaq.java.P279.exer;

public class AccountTest {
	
	public static void main(String[] args) {
		
		Account acct = new Account(1122, 20000, 0.045);
		
		acct.withdraw(30000);
		System.out.println("您的账户余额为：" + acct.getBalance());
		acct.withdraw(2500);
		System.out.println("您的账户余额为：" + acct.getBalance());
		acct.deposit(3000);
		System.out.println("您的账户余额为：" + acct.getBalance());
		System.out.println("月利率为：" + acct.getMonthlyInterest());
	}

}

package top.qaqaq.java.P279.exer;

public class CheckAccount extends Account {

	private double overdraft;// 可透支限额

	public CheckAccount(int id, double balance, double annuallntertstRate, double overdraft) {
		super(id, balance, annuallntertstRate);
		this.overdraft = overdraft;
	}

	public double getOverdraft() {
		return overdraft;
	}

	public void setOverdraft(double overdraft) {
		this.overdraft = overdraft;
	}

	@Override
	public void withdraw(double amount) {
		if(getBalance() >= amount) {
//			setBalance(getBalance() - amount);
			super.withdraw(amount);
		}else if(overdraft >= amount - getBalance()) {
			overdraft -= (amount - getBalance());
//			setBalance(0);
			super.withdraw(getBalance());
		}else {
			System.out.println("超过可透支限额！");
		}
	}

}

package top.qaqaq.java.P279.exer;

public class CheckAccountTest {
	
	public static void main(String[] args) {
		
		CheckAccount acct = new CheckAccount(1122, 20000, 0.045, 5000);
		
		acct.withdraw(5000);
		System.out.println("您的账户余额：" + acct.getBalance());
		System.out.println("您的可透支额：" + acct.getOverdraft());
		acct.withdraw(18000);
		System.out.println("您的账户余额：" + acct.getBalance());
		System.out.println("您的可透支额：" + acct.getOverdraft());
		acct.withdraw(3000);
		System.out.println("您的账户余额：" + acct.getBalance());
		System.out.println("您的可透支额：" + acct.getOverdraft());
		
	}

}