Where ampersand “&” can be put when passing argument by reference?

Question

In the examples that I saw the arguments were passed by reference in the following way:

void AddOne(int &y)

In the code that I have I s

Answer 1

It is a matter of style. Both are correct and valid.

However it seems Bjarne Stroustrup prefers putting the & and * beside the type name, emphasising the type of the variable:

int* i;   // i is a pointer to an int 
int& j;   // j is a reference to an int

See here for the pointers: https://www.stroustrup.com/bs_faq2.html#whitespace

See examples in "Programming Principles and Practices using C++" book and here for references: https://stackoverflow.blog/2019/10/11/c-creator-bjarne-stroustrup-answers-our-top-five-c-questions/

Answer 2

There is no differences between

void AddOne(int &y);

and

void AddOne(int& y);

and even

void AddOne(int&y);

in C++, as the whitespaces between actual tokens are discarded.

Answer 3

It's the same for the language, just different code conventions

Answer 4

Both are exactly the same. No difference at all.

All that matters is that & should be between the type and the variable name. Spaces don't matter.

So

void AddOne(int&  y);
void AddOne(int  &y);
void AddOne(int & y)
void AddOne(int   &     y);
void AddOne(int&y);

are same!