Class instance within another class?

Hey

I have a somewhat interesting situation / question. Let's say I had a class that was meant for database manipulation with the following code:

Code:

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#include <iostream>

using namespace std;

SQL::database testDB("test.db");

testDB << "SQL operation";

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And let's say I'm making a class of my own, in which I want to use an instance of SQL::database, just like I would in my main program.

More specifically, I'm wondering if there's a way to create an instance of SQL::database as a private member of my own class, so that my classes functions can each reference to the instance.

Thanks for the help, hope I was clear in my point!

FlyingIsFun1217

Of course:

Code:

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class MyClass
{
public:
    MyClass(void) : testDB("test.db") {}
    void foo(void) { testDB << "SQL operation"; }

private:
    SQL::database testDB;
};

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Sweet! What is the term for this? I wouldn't mind reading up on it more.

Thanks!

Quote:

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Originally Posted by FlyingIsFun1217

Sweet! What is the term for this? I wouldn't mind reading up on it more.

Thanks!

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Composition

Thanks again! Something I love about the community here, always seems to be willing to help.

FlyingIsFun1217

You could also use aggregation since the SQL database lifetime probably would not be controlled by the objects using it.