C#--第七周实验--任务2--从PhysicalObject中派生出移动物体类MovingObject并实现部分功能

/* (程序头部注释开始)
 * 程序的版权和版本声明部分
 * Copyright (c) 2011, 烟台大学计算机学院学生 
 * All rights reserved.
 * 文件名称：从PhysicalObject中派生出移动物体类MovingObject
 * 作 者： 雷恒鑫 
 * 完成日期： 2012 年10 月18日
 * 版 本 号： V1.0 
 * 对任务及求解方法的描述部分
 * 输入描述：在其中创建物体类PhysicalObject，通过其私有字段来存放重量和体积.
 * 输入描述：通过公有属性来访问其重量、体积、密度，并通过公有方法来判断该物体是否会在水中下沉。
 * 输入描述：从PhysicalObject中派生出移动物体类MovingObject，在其中增加物体的速度信息，并实现物体动量和动能的计算。

 * 问题描述：
 * 程序输出：
 * 程序头部的注释结束
 */
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace seven_week
{
    class Program
    {
        static void Main(string[] args)
        {
            PhysicalObject ph1 = new PhysicalObject();
            ph1.set_weight(50);
            ph1.set_volume(20);
            ph1.Calculation_Density();
            ph1.panduan();
            PhysicalObject ph2 = new PhysicalObject(100, 50);
            ph2.panduan();
            MovingObject ph3 = new MovingObject (100,50,200);
            Console.WriteLine("该物体的动量为{0}",ph3.energy_motion());
            Console.WriteLine("该物体的动能为{0}",ph3.momentum());
            Console.ReadKey();
        }
    }
    class PhysicalObject
    {
        private double volume;
        private double weight;
        private double Density;
        public PhysicalObject()
        {
            volume = 0;
            weight = 0;
            Density = 0;
        }
        public PhysicalObject(double volume1, double weight1)
        {
            volume = volume1;
            weight = weight1;
            Density = weight / volume;
        }
        public void set_volume(double volume)
        {
            this.volume = volume;
        }
        public void set_weight(double weight)
        {
            this.weight = weight;
        }
        public void set_Density(double Density)
        {
            this.Density = Density;
        }
        public double get_volume()
        {
            return volume;
        }
        public double get_weight()
        {
            return weight;
        }
        public double get_Density()
        {
            return Density;
        }
        public void Calculation_Density()
        {
            Density = weight / volume;
        }
        public void panduan()
        {
            if (Density > 1)
            {
                Console.WriteLine("物体的重量为{0}克，体积为{1}立方厘米,密度为{2}克/立方厘米，此物体会在水中下沉。", volume, weight, Density);
            }
            else
            {
                Console.WriteLine("物体的重量为{0}克，体积为{1}立方厘米,密度为{2}克/立方厘米，此物体不会在水中下沉。", volume, weight, Density);
            }
        }

    }

    class MovingObject : PhysicalObject
    {
        private double speech;
        public MovingObject(double volume1, double weight1, double speech):base(volume1, weight1)
        {
            this.speech = speech;
        }
        public double energy_motion()
        {
            return ((this.get_weight()*this.speech*this.speech)/2); 
        }

        public double momentum()
        {
            return (this.get_weight()*this.speech); 
        }
    }
}