C++ Update Object attributes using set function

2018-06-06 15:48:58

This question already has an answer here:

What's the difference between passing by reference vs. passing by value? 18 answers

You need to pass booklist by reference:

void UpdateOnIsbn(vector <CBooks>& booklist)

Otherwise the vector is copied and only this copy is modified.

You are passing a copy of booklist so you are modifying the copy not the original object.

Try passing a reference to the function void UpdateOnIsbn(vector <CBooks>& booklist)

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