Graceful error recovery with arithmetic

[mmacrobert]

Hi there,
I'm having trouble making some code do a "graceful" recovery for
mathematical operations. Certain functions e.g. log10, will call
"matherr" and provides an avenue for intervention in a result.

How can I do the same in a portable fashion for arithmetic operations?
For example, catching dividing by zero using scalars (int's,doubles
etc.)?

Is there a standard way of getting C++ to throw some kind of
std::exception when a math-error results? Is there any standard
implementations for this somewhere?

Thanks,
Martin

[Victor Bazarov]

mmacrobert wrote:

I'm having trouble making some code do a "graceful" recovery for
mathematical operations. Certain functions e.g. log10, will call
"matherr" and provides an avenue for intervention in a result.

How can I do the same in a portable fashion for arithmetic operations?
You can't. The only portable way is to _prevent_ it instead of _dealing_
with it when it's happened.
[..]