1. What would happen if you typed a negative number into Program 5.8? Try it and see. 2. Write a program that calculates the sum of the digits of an integer. For example, the sum of the digits of the...

2. Write a program that calculates the sum of the digits of an integer. For example, the sum of the digits of the number 2155 is 2 + 1 + 5 + 5, or 13.The program should accept any arbitrary integer the user types.