}

System.out.println("相减为:("+a+","+b+")");

public void Multiply(Complex x,Complex y){

}}

double a = x.a*y.a-x.b*y.b; double b= x.a*y.b+x.b*y.a;

System.out.println("相乘为:("+a+","+b+")");

(2) 创建银行账号Account类，实现存款(balance)的存(deposit)、取(withdraw)和查询(getbalance)等功能 。 import java.io.*;

public class Account {

public static void main(String[] args) throws IOException{ }

public Account(){ }

public void deposit()throws IOException{

System.out.println("请输入存款金额:"); BufferedReader br = new BufferedReader(new double s = Double.parseDouble(br.readLine());

System.out.println("存款成功 "+"余额为:"+(s+fund));

System.out.println("请选择服务:");

// TODO Auto-generated method stub Account a = new Account();

System.out.println("存款选择1 取款选择2 查询选择3"); BufferedReader br = new BufferedReader(new int n = Integer.parseInt(br.readLine()); if(n==1)

a.deposit(); a.withdraw(); a.getbalance();

System.out.println("输出不正确!"); else if(n==2) else if(n==3) else

double fund = 1000;

InputStreamReader(System.in));

InputStreamReader(System.in));