第11周-数学方面：Complex类

ゞ浴缸里的玫瑰 2022-08-10 06:26 148阅读 0赞

问题及代码：

/*
    *Copyright (c)2015,烟台大学计算机与控制工程学院
    *All rights reserved.
    *文件名称：Complex.java
    *作    者：单昕昕
    *完成日期：2015年11月15日
    *版 本 号：v1.0
    *问题描述：Octagon八边形。
    *程序输入：边长。
    *程序输出：面积和周长。
    */
    import java.util.Scanner;
    
    class Complex//Complex类
    {
        private double real;
        private double imag;
        private double val;
        public Complex()//初始化
        {
            this.real=0;
            this.imag=0;
        }
        public Complex(double a)
        {
            this.real=a;
            this.imag=0;
        }
        public Complex(double a,double b)
        {
            this.real=a;
            this.imag=b;
        }
        public double getRealPart()//实部
        {
            return real;
        }
        public double getImagPart()//虚部
        {
            return imag;
        }
        public void add(Complex c1,Complex c2)//加法
        {
            this.real=c1.real+c2.real;
            this.imag=c1.imag+c2.imag;
        }
        public void substract(Complex c1,Complex c2)//减法
        {
            this.real=c1.real-c2.real;
            this.imag=c1.imag-c2.imag;
        }
        public void multiply(Complex c1,Complex c2)//乘法
        {
            this.real=(c1.real*c2.real)-(c1.imag*c2.imag);
            this.imag=(c2.real*c1.imag)+(c1.real*c2.imag);
        }
        public void divide(Complex c1,Complex c2)//除法
        {
            this.real=(c1.real*c2.real+c1.imag*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag);
            this.imag=(c2.real*c1.imag-c1.real*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag);
        }
        public double abs(Complex c)//复数的绝对值
        {
        	double abs=Math.sqrt(c.real*c.real+c.imag*c.imag);
        	return abs;
        }
    }
    
    public class Test
    {
        public static void main(String args[])
        {
        	Scanner input=new Scanner(System.in);  //输入测试数据
            System.out.print("Please enter the first complex number:");    
            double a =input.nextDouble();
            double b =input.nextDouble();
            System.out.print("Please enter the second complex number:");    
            double c =input.nextDouble();
            double d =input.nextDouble();
            Complex c1=new Complex(a,b);//构建复数
        	Complex c2=new Complex(c,d);
        	//System.out.println(c1.getRealPart()+"+"+c1.getImagPart()+"i");
        	//System.out.println(c2.getRealPart()+"+"+c2.getImagPart()+"i");
        	Complex cc=new Complex();
        	cc.add(c1,c2);//运算
        	//System.out.println(cc.getRealPart()+"+"+cc.getImagPart()+"i");
        	 System.out.println(a+" + "+b+" i + "+c+" + "+d+" i = "+cc.getRealPart()+" + 
    
    "+cc.getImagPart()+" i");
        	 cc.substract(c1,c2);
        	 System.out.println(a+" + "+b+" i - "+c+" + "+d+" i = "+cc.getRealPart()+" + 
    
    "+cc.getImagPart()+" i");
        	 cc.multiply(c1,c2);
        	 System.out.println(a+" + "+b+" i * "+c+" + "+d+" i = "+cc.getRealPart()+" + 
    
    "+cc.getImagPart()+" i");
        	 cc.divide(c1,c2);
        	 System.out.println(a+" + "+b+" i / "+c+" + "+d+" i = "+cc.getRealPart()+" + 
    
    "+cc.getImagPart()+" i");
        	 cc.abs(c1);
        	 System.out.println("| "+a+" + "+b+" i | = "+cc.abs(c1));
        	 cc.abs(c2);
        	 System.out.println("| "+a+" + "+b+" i | = "+cc.abs(c2));
        }
    }

运行结果：

![20151115142856655][]

知识点总结：

类和对象。

学习心得：

Java里木有引用“&”，C++里有。。

其他的好像就和上个学期用C++写的复数类差不多啦~

[20151115142856655]: /images/20220731/79e817199b1246d3a3d2c49c54874ac6.png