class Person
{
    public Person( String n, int a )
    {
        name = n;
        age = a;
    }
    
    public Person( ) 
    {
        this( "anonymous", 0 );
    }
    
    public String getName( )
    {
        return name;
    }
    
    public int getAge( )
    {
        return age;
    }
        
    public String toString( ) 
    {
        return name + " with age " + age;
    }
    
    private String name;
    private int age;
}

class Student extends Person
{
    public Student( )
    {    
    }
    
    
    public Student( String n, int a, double g )
    {
        super( n, a );
        gpa = g;
    }
    
      
    public double getGPA( )
    {
        return gpa;
    }
    
    public String toString( ) 
    {
        return getName( ) + " with age " + getAge( ) + " with gpa " + gpa ;
    }
    
    private double gpa;
}

class Day10
{
    
    public static Person getOlder( Person lhs, Person rhs )
    {
        if( lhs.getAge( ) > rhs.getAge( ) )
            return lhs;
        else
            return rhs;
    }
    
    public static void main( String [ ] args )
    {
        Person p1 = new Person( "Chris", 29 );
        Person p2 = new Person( "Fran", 41 );
        Student s1 = new Student( "Pat", 25, 3.71 );
        Student s2 = new Student( "Alex", 37, 3.92 );
        Student s3 = new Student( );
        
        System.out.println( p1 );
        System.out.println( p2 );
        System.out.println( s1 );
        System.out.println( s2 );
        System.out.println( s3 );
        
        System.out.println( "Older person is " + getOlder( p1, p2 ) );
        System.out.println( "Older student is " + getOlder( s1, s2 ) );
        System.out.println( "Older of is " + getOlder( p1, s2 ) );
        System.out.println( "Older of is " + getOlder( s2, p1 ) );
    }
    
}