Passing arguments by reference

Answer 1

Please specify your question better, Syeda Maham, otherwise we won't be able to help you in any way.
What exactly is it that you need help with about passing arguments by reference?

https://www.sololearn.com/learn/CPlusPlus/1643/

Answer 2

You can have a look at this piece of code 👇
Hope it will help you understand it
https://code.sololearn.com/cuoqQjer2Xqu/?ref=app