When to use “delete”?

Question

I want to store 10 Obj object in objList, but i don\'t know when is appropriate use delete in this case. If i use delete Obj;

Answer 1

You wanna use the heap, so I suggest changing your vector declaration to vector of pointers, something like this.

vectorobjList;

Why? Because if it is a vector of Obj's, then the things you're storing are actually copies of the value Obj of the pointers you created. objList's items and the obj pointers you create are totally separated and unrelated! So when you,

delete obj

The things on objList are totally completely unaffected in any ways.
Moreover, vector (no asterisk), stores its item as Obj and they are on the stack, they will disappear when your program goes out of scope!