当前位置：首页 > news >正文

建网站要多少钱一年广州最新政策

news 2026/4/7 1:34:06

建网站要多少钱一年,广州最新政策,中国建设工程招标官方网站,哪个网站做网销更好本文章就讲的是很基础的类的使用重点大概就是类的构造函数以及一些很基础的东西。实验内容是些老生常谈的东西，Complex类，在当初学C面向对象的时候也是这个样子展开的。内容如以下： public class Complex {float real;float imag;public…

本文章就讲的是很基础的类的使用
重点大概就是类的构造函数以及一些很基础的东西。

实验内容是些老生常谈的东西，Complex类，在当初学C++面向对象的时候也是这个样子展开的。
内容如以下：

public class Complex {float real;float imag;public Complex(){real = 0;imag = 0;}public Complex(float real, float imag){this.real = real;this.imag = imag;}public Complex add(float real){this.real += real;return this;}public Complex add(Complex complex){this.real += complex.real;this.imag += complex.imag;return this;}public Complex sub(float real){this.real -= real;return this;}public Complex sub(Complex complex){this.real -= complex.real;this.imag -= complex.imag;return this;}public Complex mul(float real){this.real *= real;this.imag *= real;return this;}public Complex mul(Complex complex){float TheReal = this.real;float TheImag = this.imag;this.real = TheReal * complex.real - TheImag*complex.imag;this.imag = TheReal * complex.imag + TheImag*complex.real;return this;}public String toString(){String str="";if(this.imag == 0){str += this.real;}else if(this.imag > 0 ){if(this.real==0){str += this.imag + "i";}else str += this.real + "+" + this.imag + "i";}else{if(this.real==0){str += this.imag + "i";}else str += this.real + "" + this.imag + "i";}return str;}}

这里也不得不说一丁点相关知识–重载 overload
如这里的：

	public Complex(){real = 0;imag = 0;}public Complex(float real, float imag){this.real = real;this.imag = imag;}public Complex add(float real){this.real += real;return this;}public Complex add(Complex complex){this.real += complex.real;this.imag += complex.imag;return this;}

这里的Complex()，Complex(float real, float imag)构造函数也就用了一些重载的知识。
所谓重载，就是函数名不变但是函数内部的参数变化，我们调用函数时通过函数里面的参数决定我们要调用哪个函数。
同理的，Complex add(float real),Complex add(Complex complex)也是如此，当add()的括号里面是一个float值的时候调用Complex add(float real)，括号里面是一个Complex对象的时候调用Complex add(Complex complex)。
我当时认为这不是理所当然的吗？其实不是的，这里是用到了重载（overload）的知识。
总代码：
在这里插入图片描述

包com.Class.Work3里的Complex类：

package com.Class.Work3;public class Complex {float real;float imag;public Complex(){real = 0;imag = 0;}public Complex(float real, float imag){this.real = real;this.imag = imag;}public Complex add(float real){this.real += real;return this;}public Complex add(Complex complex){this.real += complex.real;this.imag += complex.imag;return this;}public Complex sub(float real){this.real -= real;return this;}public Complex sub(Complex complex){this.real -= complex.real;this.imag -= complex.imag;return this;}public Complex mul(float real){this.real *= real;this.imag *= real;return this;}public Complex mul(Complex complex){float TheReal = this.real;float TheImag = this.imag;this.real = TheReal * complex.real - TheImag*complex.imag;this.imag = TheReal * complex.imag + TheImag*complex.real;return this;}public String toString(){String str="";if(this.imag == 0){str += this.real;}else if(this.imag > 0 ){if(this.real==0){str += this.imag + "i";}else str += this.real + "+" + this.imag + "i";}else{if(this.real==0){str += this.imag + "i";}else str += this.real + "" + this.imag + "i";}return str;}}

调用Complex类的TestWork3类：

import com.Class.Work3.Complex;public class TestWork3 {public static void main(String[] args) {Complex c = new Complex(1, 2);
//        c.add(5);
//        Complex w = new Complex(4,1);
//        c.sub(w);
//        Complex w2 = new Complex(1,2);
//        c.mul(w2);
//        c.mul(5);System.out.println(c);}
}