Write a full C++ program that takes 2 inputs from the user. The first is a number that is stored in variable X of type double. The second is a string names inputstring. Then use predefined function to do the following... a. Output the results of X b. Output the result of X2 c. Output the result of [X] d. Output the result of X+X2 e. Check if inputstring is not empty using the appropriate class member function then make it empty using another member function. f. Print the now empty inputstring