When does the C++ compiler create temporary variables?

Question

Where does the table variables and temporary tables exist in the memory, in memory or physical drive?

Answer 1

If the function parameter is a "const reference", the compiler generates temporary variables in the following 2 ways.

a) If the actual argument is the correct type, but it isn't Lvalue

double Cubes(const double & num)
{
numb = numb * numb * numb;
return numb;
}

double temp = 2.0;

double value = cubes(3.0 + temp); // the argument is said to be an expression ,not the Lvalue;

b) A type can be converted to the correct type

long temp = 3 L;

double value = cuberoot ( temp ) ;