We've been using libraries this whole time to help us write our programs I stream is the one we use
the most libraries provide us with functionality that we can use that other performers have created.
They are mainly a convenience and true in terms of the time it takes to write our programs and to help
ease the process of writing programs.
Things would be a lot harder and more frustrating if we didn't have access to already built library
libraries we've made our own libraries with utils utilize the e-tail site H and CVP that we've created
that does a lot of our input.
For example and we've seen how to use them by using the Include statement.
So you may have noticed that sometimes we use double quotes around the name and sometimes we use these
kind of angle triangle brackets.
The difference is the location of where the preprocessor searches for that file in double quotes it
searches in the same directory as a file containing the Include statement.
This is usually for programmers defined headers like are you utilities in the triangles of brackets.
It will search in an implementation dependent manner.
For example the directories predesignated by the compiler.
These are usually the standard library headers reviews for example.
These types E-string see Maff and so on these plus standard library will be the theme of this section.
It's really just a large group of functions and objects that are written in the core language and part
of the C++ ISO standard.
It also includes many headers of the iso's standard.
We're not going to go through all of them.
I just want to go over the most appropriate for this course.
If you want to take a look at everything you can go to this site and that will show you basically everything
that the C++ standard library has to offer.
And there's a lot in there and it's a very very deep topic.
But I want to at least give you a little bit of exposure.
So in the next two to three lectures I briefly go over some of the more useful libraries and show you
how to use them.
You go into that much detail though.
Again this is very deep topic but it's important to learn and over the course of your studies you should
really dive deeper into it.