in C++ and as simple as can be please. This is a beginners course and I'm still learning

Program 3. Write a code that computes r by the method of Bailey-Borwein-Plouffe (1997) 72 k-0 Your program should use a while loop to read the value of n and compute the partial sum above Then print using 50 decimal digits both p and then on line below M.PI (which is the math.h constant for ?) as in: cout