In physics handle

[blastc]

Just can i know how we identify which header file should be added in header file and cpp i mean in this video it was added in header and in most it is added in cpp please clear my dought

[Philx]

I was wondering the same thing when I made this part of the course and I think, if I remember well, that the forward declaration will be seen in the next section but maybe I’m wrong and there is another reason for that.

[DanM]

Please see my response here

How do we decide whether to put #include statements in the header or cpp file?

Only include in the header if you absolutely need to. You would need to do that if you need its size, access its members or you’re inheriting from it. As all of those would need the class definition. When you have a pointer to something you don’t need its size as the size of a pointer is the same regardless to what it points to. class Example1 { int Value1 = 0; bool Value2 = false; char Value3 = 'c'; }; C++ needs to know the size of each of those variables so it knows how big Exa…