Chapter 3, Problem 7PP

An Armstrong number is an n-digit number that equals the sum of the ${\text{n}}^{th}$ power of its digits. For example 153 is a three-digit number where the sum of the cubes of the individual digits $(1^3+5^3+3^3)$ equals the number itself (153).

Write a program that takes as input the start and end numbers of an Armstrong number range to be printed. Your program should prompt for new start and end numbers until the user decides that she or he is through. Use variables of the type integer to store the start and end numbers of the range.