描述

实现一个矩阵类Rectangle，包含如下的一些成员变量与函数：

1. 两个共有的成员变量 width 和 height 分别代表宽度和高度。
2. 一个构造函数，接受2个参数 width 和 height 来设定矩阵的宽度和高度。
3. 一个成员函数 getArea，返回这个矩阵的面积。

样例

Java:    Rectangle rec = new Rectangle(3, 4);    rec.getArea(); // should get 12Python:    rec = Rectangle(3, 4)    rec.getArea()

public class Rectangle {    /*     * Define two public attributes width and height of type int.     */    // write your code here    /*     * Define a constructor which expects two parameters width and height here.     */    // write your code here        /*     * Define a public method `getArea` which can calculate the area of the     * rectangle and return.     */    // write your code here    public int width = 0;    public int height = 0;        public Rectangle(int width, int height){        this.width = width;        this.height = height;            }        public int getArea(){        return width * height;    }    }

DescriptionImplement a Rectangle class which include the following attributes and methods: 1.  Two public attributes width and height. 2.  A constructor which expects two parameters width and height of type int. 3.  A method getArea which would calculate the size of the rectangle and return.ExampleJava:    Rectangle rec = new Rectangle(3, 4);    rec.getArea(); // should get 12Python:    rec = Rectangle(3, 4)    rec.getArea()