C++ :: Data Validation For Vowels And Consonants

I'm trying to make a function that verifies if the char entered is consonant, if not, prompts user to enter another char and when it meets the criteria, return the char. I was able to do this using switch statements (which works, and i'll paste it below) but I wanted to know if there was an easier, perhaps more elegant solution for accomplishing this goal.

char isCons () // data validation for consonants{
char userCons;
bool notCons = false;
cout << "Please enter a consonant: ";
cin >> userCons;

[Code] .....