Updating vector of class objects using push_back in various functions

Question

I have a vector of class objects I\'ve created in main by reading in a data file. I\'m then passing around the vector to several different files containing functions that p

Answer 1

You should pass the vector by reference to modify the original global vector.

void addBook(vector<BookData>& books)
                            ^^^

Otherwise you are passing a copy of the original vector to the function and modifying that not the global version.

Answer 2

You need to pass your vector as a reference wherever necessary. In that specific instance, you just need to change

void addBook(vector<BookData> books)

to:

void addBook(vector<BookData>& books)

otherwise your function gets a copy of the vector, not a reference to the original one.