When to use pointers to objects when declaring in C++?

Question

C++ / C#

I'm starting to learn C++ programming. Tell me, please, when to use : when declaring an object
Object obj();,
and when
Object obj = new Object();
?

Answer 1

1. A method is a variable created on the stack.
2. This is a variable created in dynamic memory. Unless, of course, you or "your friend" did nothing with the new operator.
Heap memory is much larger than the stack area

Answer 2

Only all the same Object* obj = new, as it seems to me.
Using new allows you to create entities while the program is running.

Answer 3

On creation, not on declaration. So far, you always have the first option (but without parentheses). Understand the language and understand.