Originally posted by freeOn
cin>>response;
if (response != 1-4)
{
cout<<"That is not a valid number"<<endl;
}
Doesn't that equate to "If the response does not equal -3" ? I'll post something later once I test it out, I've been away from any C++ for a long time.

Your "while" is outside of main, by the way... I'm not even gonna guess if that works or not.