Visual C#类的定义及实现方法实例解析

using System;
public class Desk//基类Desk
{
 protected int length;//保护成员
 protected int width;
 protected int height;
 //类Desk的构造函数
 public Desk( )
 {
 length = 0;
 width = 0;
 height = 0;
 }
 //设置Desk的信息
 public void SetInfo( int Len, int Wid, int Hei )
 {
 length = Len;
 width = Wid;
 height = Hei;
 }
 //打印Desk的参数信息
 public void ShowInfo( )
 {
 Console.WriteLine("Length={0} \t Width={1} \t Height={2}", length, width, height);
 }
}
public class Furniture : Desk//定义基类Desk的派生类Furniture
{
 private int price;//私有成员
 //类Furniture的构造函数
 public Furniture ( )
 { //这里会隐式调用基类Desk的构造函数
 //Desk( );//若显示调用会出现错误
 price = 0;
 }
 //重载该类的SetInfo函数
 public void SetInfo( int Len, int Wid, int Hei, int Pri)
 {
 length = Len;
 width = Wid;
 height = Hei;
 price = Pri;
 }
 //新增的函数用以设置价格
 public void SetPri( int Pri)
 {
 price = Pri;
 }
 //重定义ShowInfo函数
 public new void ShowInfo( ) //必须加上关键字new，否则会引发一个生成错误
 {
 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( ); //隐式调用构造函数
 Console.WriteLine("Fur1初始化后的值为：");
 fur1.ShowInfo( ); //显示家具信息
 fur1.SetInfo(80,50,60,350);
 Console.WriteLine("Fur1设置具体信息后为：");
 fur1.ShowInfo( );
 fur1.SetPri(288); //重置家具价格
 Console.WriteLine("Fur1价格大优惠：");
 fur1.ShowInfo( );
 }
}