Develop a simple calculator program (with at least three programmer- built functions) that reads three positive integer numbers a, b & c and then prompts the user to enter an operation char as follows: Calculator operations: Enter A for addition (a+b+c) S for the Sum of product (a*b+a*c) F for a! /b!. O P for (a+b) D for ea + b + e E for sum of even numbers between b and c V for reversing digits of c (ex: 2951 reverses to 1592) X for exit
