Welcome to Isogram on Exercism's C++ Track. If you need help running the tests or submitting your code, check out HELP.md.
Determine if a word or phrase is an isogram.
An isogram (also known as a "nonpattern word") is a word or phrase without a repeating letter, however spaces and hyphens are allowed to appear multiple times.
Examples of isograms:
The word isograms, however, is not an isogram, because the s repeats.
Wikipedia - https://en.wikipedia.org/wiki/Isogram