Pass by reference

#1

Code Link: https://ideone.com/F6s9l7
Just today Prateek Bhaiya taught about pass by reference by using &.
By this code, I wanna see if address of ‘a’ (array of char) remains same if passed by reference and in main.
Why this code is not compiling?

#2

Arrays are always reference to functions so no need to use ‘&’ symbol.