i need to knoe how to make a program for email validation..i mean to say that in email there will be only 1 @ and only one " . " and all other letters will be either alphabatec or numeric.if any of them is not present or mre than one time repeated the compiler tell us that the email is not valid how to code it..?

Hi,

Your specifications are not completely true. For example this is a valid address:
And it has more than one '.', and also has not alphabetic or numeric characters.

An easy google search "mail validations", will give results like this:
http://www.dreamincode.net/forums/showtopic39880.htm
http://www.secureprogramming.com/?ac...pes&recipeid=3
Easy, isn't it?

As an advice which you can follow or not, if you really want to learn, first try it by yourself, look for help (in a book, internet, ....), and if you find problems then ask.

Regards.

__________________
Please, correct me if I'm wrong, and sorry for my english ;)

In addition to mamntc02's comments, this type of problem is typically solved through regular expressions. Unfortunately, regular expressions are not part of C++ proper, however a number of vendors release (non-standardized) libraries with their products. Although regular expressions are very powerful & solve this problem easily, code using them is frequently non-portable.

If you want to find out more about regular expressions, look up the subject at [url=http://wikipedia.org]Wikipedia[/ur].