// public class Main{
//     public static double add(double a, double b){
//         return a + b;
//     }
    
//     public static double minus(double a, double b){
//         return a - b;
//     }
    
//     public static double multiply(double a, double b){
//         return a * b;
//     }
    
//     public static double divide(double a, double b){
//         return a / b;
//     }
    
//     public static void main(String args[]){
//         System.out.println("4.4加上7.11的结果：" + Main.add(4.4, 7.11));
//         System.out.println("8.9减去2.28的结果：" + Main.minus(8.9, 2.28));
//         System.out.println("5.2乘以13.14的结果：" + Main.multiply(5.2, 13.14));
//         System.out.println("92除以89的结果：" + Main.divide(92, 89));
//     
// }

public class Audience{
    String name;
    int age;
    
    public Audience(String name, int age){
        this.name = name;
        this.age = age;
    }
    
    public void buyTicket(){
        if(this.age >= 18){
            System.out.println(name + "\t\t" + age + "\t\t" + 40);
        }
        else{
            System.out.println(name + "\t\t" + age + "\t\t" + 40 / 2);
        }
    }
    
    public static void main(String args[]){
        System.out.println("姓名\t\t年龄\t\t票价(元)");
        System.out.println("----------------------------------");
        
    	Audience audience1 = new Audience("李明", 20); //李明，20岁
		audience1.buyTicket(); //李明购票
		
		Audience audience2 = new Audience("钱丽", 16); //钱丽， 16岁
		audience2.buyTicket(); //钱丽购票
		
		Audience audience3 = new Audience("周刚", 8); //周刚， 8岁
		audience3.buyTicket(); //周刚购票
		
		Audience audience4 = new Audience("吴红", 32); //吴红，32岁
		audience4.buyTicket(); //吴红购票
    }
}