Reference with fonction

Question

When i do:

void incre(int &var);

int main()
{
int var = 20;
incre(var);
cout<<var<<endl;

return 0;
}

void incre(int &var)
{
var++;
}

Why does it work ?
My fonction need a reference and i havent

Answer 1

you have a reference variable which is another name to the same address on RAM

Answer 2

no

Answer 3

?? it does work.

edit.. sorry mis-read....thought you ment 'why it doesn't work'.

Answer 4

It works. Why ?

Answer 5

I dont need To do ? :

Int var = 20;
Int &rVar = var ;
Incre(rVar);