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

void addBook(vector books)

to:

void addBook(vector& books)

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