Global variables

[Ravindra Jaju]

Hi!
Please tell me how to use global variables!

I am using a program which in which I define a variable before the main
function so that the functions after it can access and change it.

But the changes I make to the global (??) variable aren't refrected in the
main part of the program.
I have tried the static identifier tag as well, but it doesn't work out.
Please help.

Thanx!

Regards,
Ravindra Jaju