主要是大小写的问题,注意C#中区分大小写。这是我改正的代码:using System;namespace TestCon
{
class Vehicle  //定義汽車類
{
public int wheels; //公有成員:輪子個數
protected  float weight;//保護成員:重量
public Vehicle(){;}
public Vehicle(int w,float g)
{
wheels=w;
weight=g;
}public void Show()
{
Console.WriteLine("the wheel of vehicle is:{0}",wheels);
Console.WriteLine("the weight of Vehicle is:{0}",weight);
}
};
class Train    //定義火車類
{
public int num;//公有成員:車廂數目
private int passengers; //私有成員:乘客數
private  float weight;//私有成員:重量
public Train(){;}
public Train(int n,int p,float w)
{
num=n;
passengers=p;
weight=w;
}
public void Show()
{
Console.WriteLine("the num of train is:{0}",num);
Console.WriteLine("the weight of train is:{0}",weight);
Console.WriteLine("the Passengers train car is:{0}",passengers);
}
}class Car:Vehicle  
{
int passengers;     //私有成員:乘客數
//int passengers;public Car(int w,float g,int p):base(w,g)
{
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);
Train t1=new Train();
Train t2=new Train(10,100,100);
Car c1=new Car(4,2,4);
v1.Show();
t1.Show();
t2.Show();
c1.Show();
}
}
}
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too simple,sometimes naive :()
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