PLEASE CODE IN C++ LANGUAGE.

Write a simple calculator program that repeatedly allows the user to select +,- from a menu of operations on real values and then enter the two operands which then computes the result of applying the selected operation to those operands. However, the only named variables you may use are pointer variables; all others must be anonymous variables. Pay close attention to the following aspects: error checking loop function pointer variables code efficiency(smart code), readability, documentation