Initialization of class members

When generating a new instance of a class, do the constructors of all private members are called automatically? And what about the case I want to call a non default constructor?

Code:

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class Something
{
private:
    YOYO yoyo; //default constructor called automatically?
    YOYO yoyo2(int num); //Possible? if not, what's the right way?
};

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Thanks.

Quote:

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When generating a new instance of a class, do the constructors of all private members are called automatically?

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Generally, the default constructors of member variables are called.

Quote:

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And what about the case I want to call a non default constructor?

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You would provide an initialisation list, e.g.,

Code:

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class Something
{
public:
    Something() : yoyo(123) {}
private:
    YOYO yoyo;
};

---

Thank you

Don't worry. The default constructors of all variables within your regardless of type and visibility is always called.