I don't understand why we use " & " in the code

Answer 1

"&" stores the memory address

int cont = 14;
int *d;
d = &cont;

int d* declares the pointer d
d = &cont; stores the memory address of cont in *d

cout << *d << endl;

prints 14

Answer 2

& - refer to the address of the pointer.

int *p=5
cout<<&p;

this &p will be refers to the memory address of the pointer where the value is stored.

Answer 3

Every variable have an address, & is used to get the address of that variable

int x
x is variable to get the address of x, we use &
like &x

Answer 4

Thats call buly reference

Answer 5

thank you, greatly appreciated

Answer 6

& is used to refer to an address of a pointer as said by others.
But also it is used in call by reference in functions as in,
func(int&x){}
here your argument say a is defined as int and den assigned as a=x.
so if value of x changes then that of a changes as well .

Answer 7

Or maybe you are talking about bitwise-and(&)?