Let we have declaration:
...
int a= 5;
int& b= a;
...
I dont understand, what difference between a and b. I think, that a and b is just adress. But where is this adress in memory? So, let we define a function:
int foo(int& x)
{
return x;
}
...
foo(a);
foo(b);
What is occuring when foo is calling? I.e. when we'r returning a value we'r going by adress whos in a or b?
What happens in your code is that a and b are effectively aliases for the same memory location.
Thus
foo(a);
and
foo(b);
are in effect identical.
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