454. 矩阵面积

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 12

Python:
    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;
    }
    
}

Description
Implement 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.


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

Python:
    rec = Rectangle(3, 4)
    rec.getArea()

454. 矩阵面积

原文：https://www.cnblogs.com/browselife/p/10645995.html