what should I write in main ?

1 ) Define a Date class containing three private attributes day , month , and year a . Provide this class with a constructor allowing the initialization of its attributes . Date ( int , int , int ) ; you have to use the default values b . Provide a set and a get method for each data member . c . Create a method to compare the current object with another , and return false if the current object is the lowest one . ) Write a class Person that has three private data members : fullName , phone Number , and birthday . Provide 2 constructors : Without parameters