/**
* 车类
* @author liangzai_cool
*
*/
public class Vehicle {
protected int wheels; //车轮数
protected int weight; //车重
}

/**
* 卡车类
* @author liangzai_cool
*
*/
public class Truck extends Vehicle {
int payload; //载重

public Truck(int wheels, int weight, int payload){
super.wheels = wheels;
super.weight = weight;
this.payload = payload;
}

public Truck(){
super.wheels = 0;
super.weight = 0;
this.payload = 0;
}
}

/**
* 汽车类
* @author liangzai_cool
*
*/
public class Car extends Vehicle {
int loader; //准载人数

public Car(int wheels, int weight, int loader){
super.wheels = wheels;
super.weight = weight;
this.loader = loader;
}

public Car(){
super.wheels = 0;
super.weight = 0;
this.loader = 0;
}
}