面向对象 实现ATM存钱 取钱 转账........

package FuXi.Day14;

// 账户类
class Account1{
    double balance;
    String id;
    public void save(double money){
        if (money < 0){
            System.out.println("参数错误");
        }else {
            balance += money;
        }
    }
    public void withdraw(double money){
        if (money < 0 ){
            System.out.println("参数有误");
        }else if (money > balance){
            System.out.println("余额不足");
        }else {
            balance -= money;
        }
    }
    // 定义一个账户 和转账的对象
    public void transfer(double money ,Customer c){
        // 
        if (money <= balance && money > 0){
            // 
            balance -= money;
            c.account.balance += money;
        }else {
            System.out.println("输入有误");
        }

    }
}
// 客户类
class Customer{
    String name; // 姓名
    String tel; // 手机号
    String cid; // 身份证号 x10
    Account1 account; // 客户的账户
}
// 银行类
class BankClerk{
    public void open(Customer c, Account1 b){
        // c是账户类的都象 b是账户类的对象 就是把账户b绑定给客户c
        c.account = b;
    }
}

public class Method_Eexer6 {
    public static void main(String[] args) {
        // 创建两个对象
        Customer c1 = new Customer();
        Customer c2 = new Customer();
        // 定义c1 c2
        c1.name = "小明";
        c1.cid  = "430424";
        c1.tel = "100";
        c2.name = "小红";
        c2.cid  = "430423";
        c2.tel = "101";
        // 定义俩个账户类的对象
        Account1 a1 = new Account1();
        Account1 a2 = new Account1();
        // 给a1 a2 赋值
        a1.id = "001";
        a1.balance = 0;
        a2.id = "002";
        a2.balance = 0;
        // 定义银行类
        BankClerk b1 = new BankClerk();
        // 给c1和c2进行绑定账户 让c1和a2可以调用c1和b2
        b1.open(c1 , a1);
        b1.open(c2 , a2);
        c1.account.save(800);
        System.out.println(c1.account.balance);
        System.out.println(c2.account.balance);
        c1.account.transfer(800,c2);
        c2.account.transfer(80,c1);
        System.out.println(c1.account.balance);
        System.out.println(c2.account.balance);

    }
}