Incompatible type error handling

[cptnben@gisco.net (Ben)]

Hi,

I am new to Ada and the instruction book I found is not really helpful
in explaining how to handle errors of unmatching types. For example,
one of the sample problems the book has me do it a simple calculator
made to work with real values. Say I programmed it to work only with
integers, yet I enter  a real number. That will cause a problem,
right?  Is the error handling automatic in Ada, or do I need to code
something in. So far I have been unsuccessful at finding example code
and instructions on how to do this.

Thanks,
Ben