using System;
class Vehichle;
{
public int wheels;
protected float weight;
public Vehichle(){;}//什么意思?不明白?
public Vehicle(int w,float g)
{
wheels=w;
weight=g;
}
public void Show()
{
Console.WriteLine("the wheel of vehicle if:{0},wheels");
Console.WriteLine("the wheel of vehicle if:{0},weight");
}
}

class Car:Vehicle
{
int passengers;
public Car(int w,float g,int p):base(w,g) //下面的传递的参数到底运行的是Car还是base里的呀?
{
wheels=w;
weight=g;
passengers=p;
}
new public void Show()
{
Console.WriteLine("the wheel of car is:{0},wheels");
Console.WriteLine("the weight of car is:{0},weight");
Console.WriteLine("the Passengers of car is:{0},Passengers");
}
}

class Test
{
public static void Main()
{
vehicle V1=new Vehicle(4,5);//它传递的参数不是4,5吗?为什么会得到下面的结果呀?
Car c1=new Car(4,2,4);
v1.show();
c1.show();
}
}

运行结果:
the wheel of vehicle is:0
the weight of vehicle is:0
the wheel of car is:4//下面的几个还好像有点明白.
the weight of car is:2
the Passengers of car is:4

怎么没有人回答呀?

怎么没有人回答呀?

public Vehichle(){;}//
这个是默认的构造函数.

楼主的程序我调试过,有点问题,我运行的结果和楼主有点不同:
using System;
namespace T
{
class Vehichle
{
public int wheels;
protected float weight;
public Vehichle() { ;}//什么意思?不明白?
public Vehichle(int w, float g)
{
wheels = w;
weight = g;
}
public void Show()
{
Console.WriteLine("the wheel of vehicle if:{0}",wheels);
Console.WriteLine("the wheel of vehicle if:{0}",weight);
}
}

class Car : Vehichle
{
int passengers;
public Car(int w, float g, int p)
: base(w, g) //下面的传递的参数到底运行的是Car还是base里的呀?
{
wheels = w;
weight = g;
passengers = p;
}
new public void Show()
{
Console.WriteLine("the wheel of car is:{0}",wheels);
Console.WriteLine("the weight of car is:{0}",weight);
Console.WriteLine("the Passengers of car is:{0}",passengers);
}
public static void Main()
{

T.Vehichle v1 = new T.Vehichle(4, 5);//它传递的参数不是4,5吗?为什么会得到下面的结果呀?
Car c1 = new Car(4, 2, 4);
v1.Show();
c1.Show();
}
}
}
运行结果:
the wheel of vehicle if:4
the wheel of vehicle if:5
the wheel of car is:4
the wheel of car is:2
the Passengers of car is:4

T.Vehichle v1 = new T.Vehichle(4, 5);//它传递的参数不是4,5吗?为什么会得到下面的结果呀?
Car c1 = new Car(4, 2, 4);//在构造CAR的时候还是要调用它的基类VEHICHLE的构造函数,由
v1.Show(); //于你没有给出基类的参数,基类构造就会调用基类的默认构造
c1.Show(); //函数VEHICHLE(),就是你写的public Vehichle() { ;}
//这一句,它就是基类的默认构造函数,它什么时候都没有做.

所以没有传值给基类,就都是0

基类Vehichle的默认构造函数看起来的确是什么都没有做,但是其实是有做的,比如int类型的wheels置0,还有float类型的数野置0
在C#里面,即使连int这种类型也有它自己的默认构造函数
T.Vehichle v1 = new T.Vehichle(4, 5);//它传递的参数不是4,5吗?为什么会得到下面的结果呀?
Car c1 = new Car(4, 2, 4);//输出结果是4,5啊,没错,我运行的结果,就在上面,你看下
v1.Show(); //你输出的0,0,是不可能的
c1.Show();

vehicle V1=new Vehicle(4,5);//它传递的参数不是4,5吗?为什么会得到下面的结果呀
v1.Show();

大小写错了吧

可能是在抄的时候,我抄错了,哈哈,谢谢各位的回答.

可是我还有一个问题.
Car c1 = new Car(4, 2, 4);继承的是 public Car(int w,float g,int p):base(w,g) //下面的传递的参数到底运行的是Car还是base里的呀?
{
wheels=w;
weight=g;
passengers=p;
}
不明白,wheels和weight不是从基类中继承过来的吗?到底是(4,2,4)是传给了谁?那个base()是什么作用.能回答一下吗?
谢谢各位的回答了.