type - The category of the listing Rental (RNT), Condo (CND), Single Family Dwelling (SFD). These three values can be established as #defined ints, as global enum types, or as static class constants, depending on what you have had in your previous course.
int price - the asking price of the property.
int bedrooms - an int from 1 to MAX_ROOMS (which is set as a static class constant, or #defined, to 20)
int days_on_market - an int that represents how many days the property has been on the market, accepted values being from zero days to five years.
string address - an oversimplified address containing whatever you decide to put into it.