java 语言程序设计-李尊朝 第6章 类和对象 练习答案

public class Account
{
String account;
String name;
String address;
double balance;
static double minBalance=50;
public Account()
{
account="XXX";
name="Jone";
address="YYY";
balance=0;
}
public Account(String account,String name,String address,double balance)
{
this.account=account;
this.address=address;
this.name=name;
this.balance=balance;
}

public void deposit(double cash)
{
System.out.println("您帐户原有余额： "+balance);
System.out.println("现存入： "+cash);
balance+=cash;
System.out.println("最终余额： "+balance);
}

public void withdraw(double cash)
{
double temp=balance-cash;
if(temp<minBalance)
System.out.println("至少保留余额："+minBalance);
else
balance=temp;
}

public void query()
{
System.out.println("您的余额是： "+balance);
}

public static void  main(String[] args)
{
Account Jame=new Account("111222","Jame","xi'an jiaotong University",200.00);
Jame.deposit(300.5);
Jame.withdraw(200);
Jame.withdraw(300);
Jame.query();
}
}

class Student1
{
String name;              //实例成员变量
String address;           //实例成员变量
static int count=0;      //类成员变量
public Student1(String m, String a )
{ name=m;
address=a;
count=count+1;
}
public static void main(String args[])
{
Student1 p1=new Student1("李明","西安市未央区");
Student1 p2=new Student1("张敏", "上海市闽行区");
System.out.println(p1.name+" "+p1.address+" "+p1.count);
Student1.count=Student1.count+1;
System.out.println(p2.name+" "+p2.address+" "+p2.count);
p1.count=p1.count-1;
System.out.println(p2.name+" "+p2.address+" "+p2.count);
}
}

习题8 编写程序,模拟银行帐户功能.要求如下

属性:帐号\储户姓名、地址、存款余额、最小余额

方法：存款、取款、查询

根据用户操作显示帐户相关信息。如存款操作后，显示储户原有余额、今日存款额、最终存款余额 ;

取款时，若最后佘额小于最小余额，拒绝取款，并显示“至少保留余额:xxx

public class Account
{
String account;
String name;
String address;
double balance;
static double minBalance=50;
public Account()
{
account="XXX";
name="Jone";
address="YYY";
balance=0;
}
public Account(String account,String name,String address,double balance)
{
this.account=account;
this.address=address;
this.name=name;
this.balance=balance;
}

public void deposit(double cash)
{
System.out.println("您帐户原有余额： "+balance);
System.out.println("现存入： "+cash);
balance+=cash;
System.out.println("最终余额： "+balance);
}

public void withdraw(double cash)
{
double temp=balance-cash;
if(temp<minBalance)
System.out.println("至少保留余额："+minBalance);
else
balance=temp;
}

public void query()
{
System.out.println("您的余额是： "+balance);
}

public static void  main(String[] args)
{
Account Jame=new Account("111222","Jame","xi'an jiaotong University",200.00);
Jame.deposit(300.5);
Jame.withdraw(200);
Jame.withdraw(300);
Jame.query();
}
}