用Java声明并测试一个复数类，其方法包括toString()及复数的加、减、乘运算。，javatostring

用Java声明并测试一个复数类，其方法包括toString()及复数的加、减、乘运算。，javatostring

Java–复数类

package com.edu.gpnu.test;

import java.util.Scanner;

public class Test {
	
	private int a;
	private int b;
	
	public Test(int a, int b) {
		super();
		this.a = a;
		this.b = b;
	}

	public Test() {
		this.a = 0;
		this.b = 0;
	}

	public int getA() {
		return a;
	}

	public void setA(int a) {
		this.a = a;
	}

	public int getB() {
		return b;
	}

	public void setB(int b) {
		this.b = b;
	}
	
	@Override
	public String toString() {
		return "[" + a  + "+" + b + "i]";
	}

	//加法 a+bi & c+di --> (a+c) + (b+d)i
	public Test add(Test test) {
		return new Test(this.a + test.getA(), this.b + test.getB());
	}
	
	//减法 a+bi & c+di --> (a-c) + (b-d)i
	public Test sub(Test test) {
		return new Test(this.a - test.getA(), this.b - test.getB());
	}
	
	//乘法 a+bi & c+di --> (ac-bd) + (bc+ad)i
	public Test mul(Test test) {
		int a = (this.a * test.a) - (this.b * test.b);
		int b = (this.a * test.b) + (this.b * test.a);
		Test result = new Test(a, b);
		return result;
	}

	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		System.out.println("第一个复数:");
		Test t1 = new Test(scanner.nextInt(), scanner.nextInt());
		System.out.println("第二个复数:");
		Test t2 = new Test(scanner.nextInt(), scanner.nextInt());
		System.out.println("(a + b) = " + t1.add(t2).toString());
		System.out.println("(a - b) = " + t1.sub(t2).toString());
		System.out.println("(a * b) = " + t1.mul(t2).toString());
		System.out.println("(a + b) + a = " + t1.add(t2).add(t1).toString());
	}

}