Default arguments in default constructor for members of type struct

Question

I have this code "for" a bank. It is organized in two structures for date, and personal information about person. The information about the bank account is organized in a class. I need to write a default constructor with predefined arguments. The class contains a data member of type struct and I don't know how to initialize the data member of type struct. Here is my code.

struct Date {
    int day, month, year;
};

struct Person {
    char name[20];
    char surname[20];
    int IDnum[13];
    Date dateBirth;
};

class BankAccount {
public:
    BankAccount( ????Person p????, int s = 0, bool em = true, int sal = 0 ) {
        ??sth for Person p I guess??
        sum = s;
        employed = em;
        salary = sal;
    }
private:
    Person person;
    int sum;
    bool employed;
    int salary;
};

I would appreciate every help. Thanks in advance.

Answer 1

Structs and classes are almost the same thing in C++, structs can have constructors which is what you should do in this situation

class BankAccount {
public:
    BankAccount(const Person& p = Person{...}, int s = 0, bool em = true, int sal = 0 )
            : person{p}, sum{s}, employed{em}, salary{sal} {}
private:
    Person person;
    int sum;
    bool employed;
    int salary;
};

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You can also provide initializers for member variables in the class definition itself, for example

struct Something {
    int integer{1};
    bool boolean{false};
};

Answer 2

It's the same syntax you use when initializing a struct / class variable.

BankAccount(Person p = {"John", "Doe", {1,2,3,/*...*/}, {1,1,2000}}, int s = 0, bool em = true, int sal = 0 )

If some initializers are missing, like Person p = {"John", "Doe"} , then all fields lacking initializers are zero-initialized.

It means you could even do Person p = {} to set all fields to zeroes.

Optionally you can write Person{...} instead of {...} , which is what @Curious did.

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Also, if you're using C++, please use std::string s instead of char arrays.