error: switch quantity not an integer

Question

I have researched my issue all over StackOverflow and multi-google links, and I am still confused. I figured the best thing for me is ask...

Im creating a simple co

Answer 1

As others and the compiler commented, strings are not allowed with switch. I would just use if

bool Calculator::is_legal_command() const {
    if(command == TAN) return true;
    if(command == SIN) return true;
    if(command == COS) return true;
    if(command == LOG) return true;
    if(command == LOG10) return true;
    return false;
}

I don't think that's any more complicated, and it's about as fast as it could get. You could also use my switch macro, making it look like

bool Calculator::is_legal_command() const {
    sswitch(command)
    {
    scase (TAN):
    scase (SIN):
    scase (COS):
    scase (LOG):
    scase (LOG10):
        return true;

    sdefault():
        return false;
    }
}

(having break after a return is dead code, and so should be avoided).