封装、继承、多态 基础

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__________#_______####_______####______________
    身是菩提树，心如明镜台，时时勤拂拭，勿使惹尘埃。
                我们的未来没有BUG              
* ==============================================================================
* Filename: AbstractScript
* Created:  $time$
* Author:   WYC
* Purpose:  封装、继承、多态
* ==============================================================================
*/
using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class AbstractScript : MonoBehaviour {

    
    void Start () {
        Circle circle = new Circle();
        circle.R = 20;

        Rectangle rectangle = new Rectangle();
        rectangle.Width = 20;
        rectangle.Height = 30;

        List<Shape> shapeList = new List<Shape>();
        shapeList.Add(circle);
        shapeList.Add(rectangle);

        foreach (var shape in shapeList)
        {
            shape.PrintArea(shape.CalculateArea());
            shape.PrintPerimeter(shape.CalculatePerimeter());
        }

    }
}

public abstract class Shape {

    public string ShapeName { get; private set; }

    public Shape(string shapeName) {
        ShapeName = shapeName;
    }

    public virtual void PrintPerimeter(double perimeter) {
        Debug.Log(ShapeName + "perimeter:" + perimeter);
    }

    public virtual void PrintArea(double area) {
        Debug.Log(ShapeName + "Area:" + area);
    }

    public abstract double CalculatePerimeter();

    public abstract double CalculateArea();
}
public class Circle : Shape
{
    public double R { get; set; }

    public Circle() : base("圆") {
        this.R = 0;
    }

    public override double CalculatePerimeter()
    {
        return 2 * Math.PI * R;
    }

    public override double CalculateArea()
    {
        return Math.PI * R * R;
    }
}

public class Rectangle : Shape
{
    public double Width { get; set; }
    public double Height { get; set; }

    public Rectangle() : base("长方形")
    {
        this.Width = 0;
        this.Height = 0;
    }

    public override double CalculatePerimeter()
    {
        return (Width + Height) * 2;
    }

    public override double CalculateArea()
    {
        return Width * Height;
    }
}