Question

I need to have several instances of a union as class variables, so how can I create a union instance in the heap? thank you

Answer 1

The same as creating any other object:

union MyUnion
{
   unsigned char charValue[5];
   unsigned int  intValue;
};


MyUnion *myUnion = new MyUnion;

Your union is now on the heap. Note that a union is the size of it’s largest data member.