C#

Rob Graham wrote:

Google is your friend...even for homework questions

try
{
   // Exception causing code
}
catch(Exception e)
{
   Console.WriteLine(e); // Or if it's a Windows app, use MessageBox.Show(e.ToString());
}

1)
to see what goes wrong, look at the intermediate results, so print at least p.text.Lenght,
and if necessary (but this may get very large) p.text itself, or part of it, e.g.
p.text.Substring(0,80)
You may want to create a function that does this in an intelligent way, i.e.
printing length, and full or partial contentdepending on size.

2)
regular expressions use special characters such as \ and | and some more.
to get them literally, you should escape them so to get a | you need a \|
But then the C/C++/C# languages will try to interpret the backslash, so you must
either escape it again (hence \\|) or prefix the entire constant string by a @ sign
(@"...\|...")

3)
I dont think there is a need to use 0x7C when what you want is a vertical bar;
just type | and you will get more readable code.

4)
general advice: if something goes wrong, break it down into smaller pieces, until]
you can easily see where it starts to go wrong. In this particular case:
print intermediate values, reduce the size of the problem (fewer than 20 strings!);
if this does not help, perform some experiments (e.g. on the behaviour of Regex).

Greetings,

:cool: