rectangle类的width

构造函数没有给成员变量赋值 public Rectangle(double height,double width){ this.height = height; this.width = width; }还有 public double getArea() { return height * width; }最好这么写，不然成...

你这样看看 public static class TestRectangle{ public static void main (String args[]){ Rectangle r1=new Rectangle(5.6,12.5);Rectangle r2=new Rectangle(2,3);} class Rectangle{ double width;double height;Re...

public class Rectangle{ private double rLength;private double rWidth;private double getLength(){ return this.rLength;} private double getWidth(){ return this.rWidth;} private void setLength(double length){ this...

double width,height;};int main(){ Circle circle(12.6);//建立Circle 类对象 circle Square square(3.5);//建立Square 类对象 square Rectangle rectangle(4.5,8.4);//建立Rectangle 类对象 rectangle Trapezoid ...

class Rectangle{ public int Length=1;public int Width=1;public long CalcPerimeter(int len,int w){ return len*w;} public long CalcPerimeter(){ return this.Length * this.Width;} } ...

第一题：using System;using System.Collections.Generic;using System.Linq;using System.Text; namespace _1{ class rectangle { private double width, height, S, L; public rectangle(double w, double h...

public class Rectangle { private double width;private double height;public Rectangle(){ } public Rectangle(double width, double height){ this.width = width;this.height = height;} public static void main(String...

include <iostream> using namespace std;class Rectangle { double width, height;public:void setRectangle(double width, double height) { this->width = width;this->height = height;} double getArea() { return ...

import java.math.BigDecimal;public class Rectangle { private double width; //宽 private double length; //长 / return 获得面积 / public double getRectangleArea(){ double area=new BigDecimal(width).multiply(...

/ 定义一个Point类,数据成员包括横坐标x和纵坐标y，成员函数包括构造函数和信息打印函数show_info。并从Point类公有派生Rectangle类和Circle类。其中Rectangle派生类中新增数据成员有宽度width和高度height、新增公有成员函数area...