Hey,

while I don't know of any editor which exports in the format you described, perhaps you can use Mappy, it has a customizable file format as well as a file format reader library, so maybe this fits your needs.
Else, you could write the editor yourself (shouldn't be too hard). Perhaps this is a good moment to try out C#, if you haven't already?

Greets,
Konfu

Also, I seem to recall that some compilers will choke if they're given an initialization list that's too large. If your maps start getting large enough, you'll run into this issue; Mappy is an option, but I'd recommend building your own even above that. (Use the file I/O functions, such as the ofstream/ifstream classes.)

Cheers,
Twilight Dragon