UC知道有一句看不太懂！
来源：百度知道 编辑：UC知道 时间：2024/05/11 02:14:41
using System;
class TestClass
{
public class Dimensions
{
public const double PI = Math.PI;
protected double x, y;
public Dimensions()
{
}
public Dimensions(double x, double y)
{
this.x = x;
this.y = y;
}
public virtual double Area()
{
return x * y;
}
}
class Cylinder : Dimensions
{
public Cylinder(double r, double h) : base(r, h)
{
}
public override double Area()
{
return 2 * PI * x * x + 2 * PI * x * y;
}
}
static void Main()
{
double r = 3.0, h = 5.0;
Dimensions l = new Cylinder(r, h);
Console.WriteLine("Area of Cylinder = {0:F2}", l.Area());
class TestClass
{
public class Dimensions
{
public const double PI = Math.PI;
protected double x, y;
public Dimensions()
{
}
public Dimensions(double x, double y)
{
this.x = x;
this.y = y;
}
public virtual double Area()
{
return x * y;
}
}
class Cylinder : Dimensions
{
public Cylinder(double r, double h) : base(r, h)
{
}
public override double Area()
{
return 2 * PI * x * x + 2 * PI * x * y;
}
}
static void Main()
{
double r = 3.0, h = 5.0;
Dimensions l = new Cylinder(r, h);
Console.WriteLine("Area of Cylinder = {0:F2}", l.Area());
我把他们的回答总结一句通俗的话吧:base关键字可以用来访问当前对象的基类对象，进而调用基类对象的成员!
还是举个例子吧:
比如说有个父类(基类)
public class Contact
{
//字段..
//属性..
//索引函数..
//构造函数
public Contact(string sName)
{
m_name=sName;
}
//方法..
}
现在有个子类（派生类）去继承调用他的基类对象的成员
则必须使用关键字base来实现，就象你是爸的儿子，你要继承父业的某些东西，你得和他姓！好象这个比喻有点牵强！
public class Classmate:Contact
{
//字段..
//属性..
//构造函数
public class Classmate(string sName):base(sName)
{
}
}
*************************************************
base(r, h) 调用父类的构造函数，然后this.x = x 是说，当前父类的x就变成传进来的r？，然后public Cylinder(double r, double h) : base(r, h)的时候就相当是继承了父类的构造函数的参数。其实父类的那个方法也不是很理解，顺便解释一下吧!
public Dimensions(double x, double y)
{
this.x = x;
this.y = y;
}
************************************************************
首先要知道 Base 是子类中引用父类
在这里因为是要将参数的x