Parse error in catch statement

I'm trying to do an exercise in Accelerated C++, and I'm taking this part of the code straight from the book. However, it will not compile and I can't figure out why.

Code:

---

double grade_aux(const Student_info& s)
{
    try
    {
        return grade(s);
    }
    catch (domain_error)
    {
        return grade(s.midterm, s.final, 0);
    }
}

---

Unless I'm blind, the code is typed in just the same as in the book, and is consistent with what I know of catching exceptions.
I'm using Dev-C++ on Win XP. If I comment out this function, the file compiles fine. It gives me:

" Parse error before ')' " on the bolded line when I try to compile.

Any thoughts? (Relevant to this error, anyway?)

Is there supposed to be a throw in there somewhere..??

might need to see more code.. might be a typo....

is grade_aux() derived from any particular class...?



don't have the book (yet) so this is all I can offer ye' right now

There doesn't need to be a throw, but domain_error needs to be defined, and the header that declares it must be included.

Post the declaration of domain_error, the prototype for grade(), and the full text of the error(s).

I'm pretty sure grade is prototyped as:

Code:

---

double grade(const double&, const double&, const double&);

---

and

Code:

---

double grade(const Student_info&);

---

I don't have the book here at work and internet's down at home :eek: so I can't say for sure until tomorrow.
The error is pretty much all there, just the line number is missing. There was also a "confused by previous errors, bailing out" error on the same line.

I'm sure, however, that I forgot to #include <exception>. oops.

Thanks for the help. If that's not it, I'll post more information tomorrow.

Oh, I didn't recognize that domain_error was part of the standard C++ exception hierarchy. Then yes, it should work if you #include <stdexcept> and specify the std namespace.

Quote:

---

and specify the std namespace.

---

I didn't realize I had to. I'm trying to only use what the book has taught so far, and so with these problems I'm still using "using std::whatever".

If I have to use the std namespace, should I also add

Code:

---

using std::domain_error

---

or something different? (I'd check the book before asking, but of course this is the day I didn't bring it with me...)

Yes, using std::domain_error; will work.

Since domain_error is part of the std namespace, you have to call it std::domain_error in your code, or put the using declaration like you mentioned, or have a global using directive. If you've been using using declarations like using std::cout, then you should be consistent and do the same for domain_error.

Awesome, thanks.

Quote:

---

catch (domain_error)

---

In addition, you are only specifying the type of the exception and not a variable. It compiles without specifying the variable, but I think you probably want to list the variable as a matter of course, just like you do when listing function parameters. Something like this:

Code:

---

catch(std::domain_error& rEx)

---

What do you think of Accelerated C++? Is that your first C++ book?

I am really happy with Accelerated C++. It's well written, has a good pace and the exercises aren't just busy work; they really help me to understand the topics.

I took a semester of C++ in college, but it was all procedural using non-standard code. (Looking back it was pretty much writing QBASIC programs with C++ syntax.) I suppose that counts as my first C++ book, but I promptly threw it away once I joined this forum and found out the textbook was absolute crap. I bought this to unlearn the bad habits I picked up in that book (void main(), etc.). Between Accelerated C++ and this forum I've learned far more than I did in that class.