public class HelloWorld {

    public static void main(String[] args) {

int age=25;

   if(age<60){

    System.out.println("老年");

} else if(40 <= age <= 60);{

    System.out.println("中年");

} else if(18 <= age <= 40);{

    System.out.println("少年");

} else{

    System.out.println("童年");

   }

}

}