Memory management in Qt?

[wookoon]

I'm quite new to Qt and am wondering on some basic stuff with memory management and the life of objects. When do I need to delete / destroy my objects? Is any of this handled automatically?

In the example below, which of the objects I create do I need to delete? What happens to the instance variable myOtherClass when myClass is destroyed? What happens if I don't delete / destroy my objects at all, will that be a problem to memory?

in MyClass.h:

class MyClass
{
 
public:
    MyClass();
    ~MyClass();
    MyOtherClass *myOtherClass;
};

class MyClass
{

public:
    MyClass();
    ~MyClass();
    MyOtherClass *myOtherClass;
};

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in MyClass.cpp:

MyClass::MyClass() {
    myOtherClass = new MyOtherClass();
 
    MyOtherClass myOtherClass2;
 
    QString myString = "Hello";
}

MyClass::MyClass() {
    myOtherClass = new MyOtherClass();

    MyOtherClass myOtherClass2;

    QString myString = "Hello";
}

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As you can see this is quite newbie-easy stuff but where can I learn about this in an easy way?

Thanks really much