@elicat said in Logical public variable in object programming:
it is clear that * pA is a pointer to a new class A instance
what type of object is * pA ??
is an instance of the class but how do I declare it?
You already answered for yourself what type of object pA is --- it's a pointer to a class instance.
How to declare it? I gave you:
# Outside world goes:
classA *pA = new classA("Hello world");
but if I have set this variable in a program phase and then I will have to read it later in other classes and at other times of the process .. . how can I do? Do I have to carry the variable with me at every step?
Yes, like any other variable, if you need to access the object all over the place you have to pass it around. If it turns out(?) you often access the classA instance from your classB instance, you could create a classA * member variable in your classB and then if you're passing a classB instance around it will carry with it a classA * to save you having to pass that around separately.
