public abstract class vehicle {

 public String name ;
 public int age;
 public int weight;
 public int population;
 public abstract void eat();
}

public class car extends vehicle{

 @Override
 public void eat() {
  // TODO Auto-generated method stub
  System.err.println("轿车可以拉人");
 }
}

public class freightcar extends vehicle {

 @Override
 public void eat() {
  // TODO Auto-generated method stub
  System.out.println("货车只能载货");
 }

}

public class Van extends vehicle {

 @Override
 public void eat() {
  // TODO Auto-generated method stub
  System.out.println("面包车既可以拉车也可以拉人");
 }
}

public class Inner {

 public static void main(String[] args) {
  // TODO Auto-generated method stub
  
  vehicle v1 = new car();
  v1.name="轿车,只能拉人";
  v1.age=150;
  v1.population=5;
  
  vehicle v2 = new Van();
  v2.name="面包车,也可载货";
  v2.age=200;
  v2.population=6;
  v2.weight=1;
  vehicle v3 = new freightcar();
  v3.name="货车只可载货";
  v3.age=200;
  v3.weight=3;
  Scanner  sa = new Scanner(System.in);
  while(true) {
   
  
  System.out.println("请选择适合车辆-");
  System.out.println("---------------");
  System.out.println("A：轿车"+","+"B:面包车"+","+"C:火车"+"注意请用ABC来选择(区分大小写)");
  String Sname=sa.nextLine();
  if(Sname.equals("A"))
  {
   System.out.println("您选择的车辆是：");
   System.out.println("-----------------");
   System.out.println("选择车辆："+v1.name);
   System.out.println("价钱："+v1.age);
   System.out.println("承载人数："+v1.population);
   System.out.println("-----------------");
   System.out.println("您已选择轿车成功，系统将自动跳出程序，请到前台交钱");
   return;
  }else if(Sname.equals("B"))
  {
   System.out.println("您选择的车辆是：");
   System.out.println("-----------------");
   System.out.println("选择车辆："+v2.name);
   System.out.println("价钱："+v2.age);
   System.out.println("承载人数："+v2.population);
   System.out.println("承载货物重量："+v2.weight+"千克");
   System.out.println("-----------------");
   System.out.println("您已选择面包车成功，系统将自动跳出程序，请到前台交钱");
   return;
  }else if(Sname.equals("C"))
  {
   System.out.println("您选择的车辆是：");
   System.out.println("-----------------");
   System.out.println("选择车辆："+v3.name);
   System.out.println("价钱："+v3.age);
   System.out.println("承载货物重量："+v3.weight+"千克");
   System.out.println("-----------------");
   System.out.println("您已选择货车成功，系统将自动跳出程序，请到前台交钱");
   return;
  }else {
   System.out.println("您输入的信息有误，请用 A B C 来形容你选择的车辆，区分大小写");
  }
 }
 }

}