用C#编写程序，定义一个animal类，具有color,weight属性和sound,eat等方

，然后创建animal类的dog,cat,cow子类，并根据各子类的特征设置相关的方法和属性（如不同的叫声汪汪，喵呜，哞哞，食用不同的食欲骨头，鱼，草）

class Vehicle {
private int wheels;
private float weight;
protected Vehicle(int wheels, float weight){
this.wheels = wheels;
this.weight = weight;
}
public int getWheels() {
return wheels;
}
public float getWeight() {
return weight;
}
public void print(){
System.out.println("汽车：");
System.out.println("共有"+this.getWheels()+"个轮子");
System.out.println("重量为"+this.getWeight()+"吨");
}
}
class Car extends Vehicle{
private int passenger_load;
public Car(int wheels, float weight, int passenger_load) {
super(wheels, weight);
this.passenger_load = passenger_load;
}
public int getPassenger_load() {
return passenger_load;
}
public void print(){
System.out.println("小车：");
System.out.println("共有"+this.getWheels()+"个轮子");
System.out.println("重量为"+this.getWeight()+"吨");
System.out.println("载人数为"+this.getPassenger_load()+"人");
}
}

class Truck extends Vehicle{
private int passenger_load;
private float payload;
public Truck(int wheels, float weight, int passenger_load, float payload) {
super(wheels, weight);
this.passenger_load = passenger_load;
this.payload = payload;
}
public int getPassenger_load() {
return passenger_load;
}
public float getPayload() {
return payload;
}
public void print(){
System.out.println("卡车：");
System.out.println("共有"+this.getWheels()+"个轮子");
System.out.println("重量为"+this.getWeight()+"吨");
System.out.println("载人数为"+this.getPassenger_load()+"人");
System.out.println("载重量为"+this.getPayload()+"吨");
}
}

public class Test{
public static void main(String args[]){
Vehicle car = new Car(4, 3, 4);
Vehicle truck = new Truck(6, 6, 2, 10);
System.out.println("*****************************");
car.print();
System.out.println("*****************************");
truck.print();
}

}

定义一个基类，sound和eat抽象，然后定义子类写具体实现 /// /// 父抽象类 /// public abstract class animal { public string color { get; set; } public decimal weight { get; set; } public abstract string sound(); public abstract string eat(); } /// /// 狗狗 /// public class dog : animal { public override string eat() { return "骨头"; } public override string sound() { return "汪汪"; } } /// /// 猫猫 /// public class cat : animal { public override string eat() { return "鱼"; } public override string sound() { return "喵呜"; } } /// /// 牛牛 /// public class dog : animal { public override string eat() { return "草"; } public override string sound() { return "哞哞"; } }

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