(SOLVED) Members of a class should be allocated on heap or stack?

[giowck]

I didn't find a good answer on the net...

Should i allocate members of a class on heap or stack?

class MyClass
{
    public:
        MyClass();
 
    private:
       QString *heap;
       QString  stack;
       int i, j, k;
       AnotherClass anotherclass; // or *anotherclass?
}

class MyClass
{
    public:
        MyClass();

    private:
       QString *heap;
       QString  stack;
       int i, j, k;
       AnotherClass anotherclass; // or *anotherclass?
}

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When should i use heap allocation?