The ___________________ functions return values indicating an object’s proximity to another object.

Which of the following is true about a circular doubly linked list?

a) inserting into the first position of the list is a special case b) deleting from the last position of the list is not a special case c) the precede reference of the last node has the value null d) the next reference of the last node has the value null

What is the output of the following code?

``` #include using namespace std; void f(double &p) { p += 2; } int main() { double x = 1; double y = 1; f(x); f(y); cout << "x is " << x; cout << " y is " << y << endl; return 0; } ``` A. x is 2 y is 2 B. x is 1 y is 1 C. x is 1 y is 2 D. x is 3 y is 3 E. x is 2 y is 1