title: How to use Libraries
body: <p>For some reason I'm never able to use external libraries in any language. I'm looking for instructions/explanations of how to use external libraries, as well as how they work. When I search online, I get fragments that never seem to apply to whatever library I download and try and use. I work on both a mac and a pc, and C++ examples are fine. I use eclipse IDE with the C++ plug in. If there are instructions that apply to all libraries that would be great. </p>