How to add variable to derived initialization list from base class initialization list?

Question

I have a base class ShowTicket with parameterized constructor:

    //constructor
        ShowTicket(const char* Row, const char* SeatNumber):
        sold_status{false},
        row(Row),
        seat_number(SeatNumber)
        {}

I am creating a derived class, SportTicket that will take the same parameters as ShowTicket but will add a new boolean value to keep track of beer_sold. The problem is I do not know how to tell C++ that I still want sold_status to be intialized to false in the SportTicket Constructor.

I tried doing this:

    //Constructor
    SportTicket(const char* Row, const char* SeatNumber):
    ShowTicket(Row, SeatNumber),
    beer_sold{false},
    sold_status{false}
    {}

But I received the following error message:

Member initializer 'sold_status' does not name a non-static data member or base class

Is sold_satus already initialized to false because the variable is inherited from the base classes initialization list or is there a different syntax I can use to bring this variable into my derived class?

sold_status belongs to the base class so, yes, it's initialized to false if that's the only constructor in ShowTicket. — Ted Lyngmo
– Ted Lyngmo, Commented May 23, 2022 at 19:09

Vlad from Moscow · Accepted Answer · 2022-05-23 19:16:55Z

3

The constructor of the class ShowTicket itself initializes its data member sold_status to false

//constructor
    ShowTicket(const char* Row, const char* SeatNumber):
    sold_status{false},
    row(Row),
    seat_number(SeatNumber)
    {}

So in the derived class just remove the line

sold_status{false}

because it is incorrect and redundant.

//Constructor
SportTicket(const char* Row, const char* SeatNumber):
ShowTicket(Row, SeatNumber),
beer_sold{false}
{}

edited May 23, 2022 at 19:16

answered May 23, 2022 at 19:14

Vlad from Moscow

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