Left value

[enemy]

Hello!
Please, it says in a book:
"left value is everythnig that can be used to initioalise a reference."

Please, what is exactly a reference?
many thanks!!

[JewelCpp]

see this code:

int x=3;
int &y=x;
cout<<"&x="<<&x<<endl;
cout<<"&y="<<&y<<endl;
x=5;
cout<<"y="<<y<<endl;
y=3;
cout<<"x="<<x;

the output is:

&x=AAAAAAAA
&y=AAAAAAAA
y=5
x=3

here y is a reference to x
as you can see here when you changed x, y also changed and vice-versa that's because y became x (the same address as you can see also in the first two lines)

[enemy]

Hello!, JewelCpp!!!
It says here, left value is everything in the memory space that can have an address.

But

we INITIALISE with a right value, not the left one, don't we?

So, the better definition of a left value is that it CAN HAVE AN ADDRESS, isn't it?

int& a=b;

b is also a left value cause it can have an adress.

So, we DO NOT INITIALISE WITH LEFT VALUE, but, left value is all that CAN BE INITIALISED by anything.

Did I understand it properly?

Many thanks!!!

[JewelCpp]

Sorry I'm late what I did is that I answered your question

Please, what is exactly a reference?

as best as I could (and know)
I didn't tri to correct the book or anything