can any 1 send me yhe programmes(in c) for bit stuffing(& bit de-stuffing),character stuffing(&character de-stuffing),
Actually, this isn't a free software store, it's a programming help forum. You will have better luck if you break a sweat and show some code, then ask for help with it. You will also have better luck if you avoid AOL-speak and actually spell out words like "one". I also recommend the "Before you make a query" thread very highly.
