using System;public class Desk//基類Desk{ protected int length;//保護成員 protected int width; protected int height; //類Desk的構造函數 public Desk( ) { length = 0; width = 0; height = 0; } //設置Desk的信息 public void SetInfo( int Len, int Wid, int Hei ) { length = Len; width = Wid; height = Hei; } //打印Desk的參數信息 public void ShowInfo( ) { Console.WriteLine("Length={0} /t Width={1} /t Height={2}", length, width, height); }}public class Furniture : Desk//定義基類Desk的派生類Furniture{ private int price;//私有成員 //類Furniture的構造函數 public Furniture ( ) { //這里會隱式調用基類Desk的構造函數 //Desk( );//若顯示調用會出現錯誤 price = 0; } //重載該類的SetInfo函數 public void SetInfo( int Len, int Wid, int Hei, int Pri) { length = Len; width = Wid; height = Hei; price = Pri; } //新增的函數用以設置價格 public void SetPri( int Pri) { price = Pri; } //重定義ShowInfo函數 public new void ShowInfo( ) //必須加上關鍵字new，否則會引發一個生成錯誤 { Console.WriteLine("Length={0} /t Width={1} /t Height={2} /t Price={3}",length, width, height, price); }}class Test{ public static void Main() { Furniture fur1 = new Furniture( ); //隱式調用構造函數 Console.WriteLine("Fur1初始化后的值為："); fur1.ShowInfo( ); //顯示家具信息 fur1.SetInfo(80,50,60,350); Console.WriteLine("Fur1設置具體信息后為："); fur1.ShowInfo( ); fur1.SetPri(288); //重置家具價格 Console.WriteLine("Fur1價格大優惠："); fur1.ShowInfo( ); }}