Extract links from a web page

I'm not going to write out the code because there are plenty of examples online that you can find by googling "web scraping" but the basics are
1.) Get the HTML using something like libcurl
2.) Convert it to XML using something like libtidy
(Step 2 is optional but its easier to find good XML parsers depending on the language you use)
3.) Parse the results to pull out the links using something like libxml
(If you don't convert to XML you'd have to find a good HTML parser or create your own parser)

Generally if your doing web scraping its a lot easier to use a language like python and there are tons of resources on web scraping with python.

All of the stuff I listed above has plenty of documentation to show you how to properly use it to do what you need.

You can uses the HTML Agility Pack (HAP)[^] for that purpose.

For simple tasks like getting all links, it will be easy to uses as you can use a simple pattern to search for matches...

You can do this in 3 ways.

CSS Selectors : Just use a in selector and extract the HREF attribute. See some example with this Web scraping Chrome extension

XPATH : //body//a

Or use REGEX for link extraction : <a href="([^"]+)"