Thread: Simple boolean problem

I always use Visual C++, but now I'm in school and they have only DOS version of Borland C++ with really @#^&* help. I've never seen worse help than this. Even QBasic has better. My problem is funny. This line:

Code:

  bool test() {
    return true;
  }

doesn't compile!
I think it doesn't take the bool type - it's not highlighted as a keyword. Maybe I have to link a library to use bool type. If so, what library is it? I can't find something in this stupid DOS help. And if not, how can I solve my problem?

I defined bool by myself for now:

Code:

enum bool {true = 1, false = 0};

But if anyone knows which library is it, please reply.

hm... I think the bool datatype is C++ standard, but anyway,

>"doesn't compile!"

Can you give any more info ? Your compiler must have given you
some sort of explanation WHY it doesn't compile.

I'm home now, but as far as I remember, there was some sort of "declaration error" or something. I'm almost sure it didn't recognize the bool type, because if I changed type of this return value from bool to e.g. int and used "true" or "false" identifiers later in code, I received an error telling me those symbols are undefined.
There was no syntactic mistake, I checked the code about 100 times. And after all, what mistake can one make in 3 lines of code? Maybe I'm so stupid that I made one (it seems strange to me too why bool shouldn't be standard type), but which one??

> My old compiler, Borland C/C++ v3.1, does not support "bool"; so I just typedef it as a char (or use enum in C++).

That's what they has in our school. There are NC computers which boot from network and have no VC or BCW installed.

make a file boolean.h and include it whenevr you need to use bool if your compiler doesn't support it natively....

boolean.h

Code:

typedef char bool;
const bool false=0;
const bool true=1;

I know. I was just wondering why it's not implemented. Thanx anyway.