Custom Exception Class frustration.

[mcelgiraffe]

Sorry, but exceptions have me lost. I understand the basic try, throw, catch, but in trying to understand it better I have become frustrated and you guys always seem to get me headed in the right direction. So just a brief summary of the project.

We are supposed to manipulate an array of Student records. I have a custom string class & and an Array Template Class. I also have a Names class which uses the String Class; and an Address Class which uses a DigitString class inherited from the String Class but only accepts digits. Then there is a Student Class that uses the Name, Address, & Array Classes. Then in main, I tie it all together using the Array Template to hold the collection of Students.

This goes beyond what is required, but I would like to add an exceptions class to handle the exceptions that I anticipate might be thrown; such as INDEX_OUT_OF_BOUNDS_EXCEPTION, NON_DIGIT_EXCEPTION, etc.

kind of where I am heading is:

class MyExceptions
{
enum Exceptions {INDEX_OUT_OF_BOUNDS_EXCEPTION, NON_DIGIT_EXCEPTION};

MyExceptions (0); //From anywhere that included this header I could throw the INDEX_OUT_OF_BOUNDS and have it caught here.
MyExceptions (1); // From anywhere that included this header I could throw the NON_DIGIT_EXCEPTION and have it caught here.

};

Is this making any since at all? Please excuse my ignorance on this subject. I have done some searches and I just can't get it to click.

[Disch]

You can't designate where exceptions are caught. All an exception class does is it acts as a container to hold data relating to the exception. The exception itself is always caught in the catch block:

try
{
  //...
  //  if any exception is thrown here
  //
}
catch(...)
{
  // it will be caught here
}

You cannot have an exception caught by a designated function like that. It's always caught by somewhere higher up in the call stack.

[mcelgiraffe]

I really don't know how to convey my question correctly. I have to miss class tomorrow for work and was hoping to get some help sooner. But I will pose this in class on Thursday and maybe my instructor can decifer my gibberish a little better face to face. I will post back later on. Thanks for replying.

[moorecm]

Don't make an enumeration for exceptions (because you could only catch by type--not value). Check this out:
http://cplusplus.com/doc/tutorial/exceptions/