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Welcome back. Now that we've installed the c++ compiler

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and the CodeLite IDE, it's time to run CodeLite,

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get it set up and configured so that we can start writing c++ programs.

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So the first thing we're going to do is we're going to run CodeLite. Now remember, we just installed

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it in the previous video. If you haven't installed the compiler

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or CodeLite, please go back to the previous video and do that.

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So what I'm going to do, I'm just going to click on my applications down here,

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and I'm just going to type CodeLite,

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and you can see the icon here. If you right click on it, you can add it to your favorites over here

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on the left side. But I'm just going to double click it to run it.

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Okay now thefirst time that CodeLite runs,

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you may get this message down here

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at the bottom that says CodeLite now offers a better editor color support theme.

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If you don't, it's probably -- that's fine, it's probably a newer version of CodeLite.

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In this particular version,

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I'm going to click yes. But before I do that, we're going to run a setup wizard.

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And I just really want to get rid of all this clutter.

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Let's do this in a specific way. So I'm just going to cancel this wizard.

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I'm going to run the wizard in a moment, but I'm going to run it manually.

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And let CodeLite do its thing here.

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So I want to fix this now. I'm just going to select yes.

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It says now a CodeLite restart is needed. Would you like to restart now?

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Yes.

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CodeLite will now close for a second, and it'll open up automatically.

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And you can see that this is the CodeLite interface here. We've got this left side here.

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We've got all this white space here. Now it hasn't been configured yet.

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So we want to run that setup wizard that just popped up a second ago.

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I want to run that manually. So if you come up to help,

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you can see run the setup wizard right there. That's what I want to do.

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So I'm going to select that

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and, it says welcome to the setup wizard.

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Now we only have to do this one time. We don't have to do this every time we run CodeLite.

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So at this point, I'm just going to select next.

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It's going to ask me for my development profile.

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The CodeLite IDE supports CEC++

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development PHP, JavaScript and so forth.

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I'm only going to use c++. So I'm just going to select

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c/c++development.

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Then I'm going to select next,

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and this part's really important. IT says

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let us set up your compiler for you.

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Remember, we've already installed the compiler but the compiler has to be able to work

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with CodeLite, and that's what this step does.

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So we're just going to let CodeLite scan our system for

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the compiler that we installed. So I'm just going to select this big button right here scan,

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and I'll select that.

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And you can see that CodeLite found the compiler and you

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can see there's several compilers here.

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It's really the same compiler. It's just using three different names.

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That's fine. Just select next.

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Now we can customize our colors.

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This is just the color for the CodeLite interface.

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I'm going to stay with system default because I think it looks better on video.

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The dark theme is really nice on the eyes.

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And if you like the dark theme, I'd suggest you do that one because it works great.

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But like i said for the videos, I'm just going to keep the default.

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I'm going to select next.

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I'm going to leave these settings as they are for the white space and indentation.

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And I'm going to select finish.

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CodeLite closes up and then it will reopen again.

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Now let's be absolutely sure our compilers are set up correctly.

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You can do that by going up to settings,

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and then selecting build settings.

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And you can see the compilers have been set up here.

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We're going to use GCC in our code.

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But you can see that we've got different versions of the compilers here.

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And as you can see the paths here have been set up for us,

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which is perfect that was the whole point of running the setup wizard.

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If these are empty over here,

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then you really need to run your setup wizard again

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or maybe even install the c++ compiler again because something's not right.

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Now what do we do? Well, we need to start writing our code.

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Well, in order to do that, we need a workspace.

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The way that CodeLite works is, it uses a workspace

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that contains projects.

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So each one of our projects is a c++ program,

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but they're housed in workspaces.

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but they're housed in workspaces. need to do is we need to create the workspace.

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We can do that right here by selecting new workspace

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or we can do it up here by selecting workspace,new workspace,

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again either place works fine. So I'm just going to click this button right here.

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New workspace, and I get this pop-up window that says what kind of workspace

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type you want to create?

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Well, I want to create a c++ workspace, that's what this class is all about.

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So I'm going to select c++ and select okay.

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And now where do I want to store. It basically where do I want to save

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these workspaces. So in this case, I'm just going to put it right in my documents folder.

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And my workspace name is I'm just going to call it first workspace.

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So I'm going to type FirstWorkspace.

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Now before I continue it's really important,

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I can't tell you how important this is. This is where most of the errors come up

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with building.

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Be sure that you don't use any spaces in here.

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Be sure you don't use any special characters in here.

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Keep it really, really simple. No international characters.

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Okay. So I'll say that one more time. No spaces.

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No special characters. No international characters.

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Those things cause all kinds of problems with building.

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So we want to keep the workspace names real simple,

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and that applies to project names and file names and

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everything else we do when we write c++ code.

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It's possible that your username you can see my username here on

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my ubuntu machine is Frank.

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It's possible that your username may have

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strange characters in it or international characters. If that's the case,

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find a different path to store this to

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make sure that all these characters are just really, really simple.

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So that's it. Workspace, I'm going to call it FirstWorkspace.

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You can see where it's going to be created.

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And it's going to create a file called FirstWorkspace

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.workspace that's the name of my file.

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Be sure you click down here, and make sure that's checked.

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Create the workspace under a separate directory that'll

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really handy because it'll keep everything nicely organized.

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That's it. Select okay,

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and you can see right over here on the left side where my mouse is that

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we've got our first workspace. Now in and of itself,

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a workspace isn't really do anything for you.

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The whole point of the workspace is to add projects to it.

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And that's what we're going to do now.

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So we're going to add a project to the workspace.

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We can do that by clicking on the workspace and then right clicking

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and selecting new, new project.

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Okay. So let me do that again right click on the first on your workspace,

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new, new project. I'll select that,

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and now we get this new project dialogue.

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And there's a whole bunch of settings here,

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and these are really really important to get right.

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First of all, we're in the workspace we created. That's exactly what we wanted.

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So now what's the name of the project?

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Well, we can have multiple projects in the workspace, as I said.

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So I'm just going to call this project1.

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Again, no spaces. No special characters. No international characters.

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Make sure that this check is checked. Create the project in its own folder

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that will allow us to have

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one folder for each project we create that keeps it nicely organized.

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Now these settings here are really important to get right.So I'll go through them really slowly.

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The first one is category.

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The category is going to be console. You can see we can create graphical

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user interfaces, templates, all kinds of stuff.

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We want to create a console application.

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That's an application that runs in the terminal window.

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The type is going to be simple executable g++.

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Okay. Again, really important simple executable g ++.

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G++ is the name of our c++ compiler.

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It's got the g because it was created by the gnu foundation.

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So, again simple executable g ++.

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Don't choose any of these other ones or you're going to get all kinds of build problems.

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The compiler. Remember, we ran that setup wizard.

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So now we're going to come to compiler. I'm just going to choose GCC.

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The debugger, we want to choose the gnu GDB debugger.

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And then this last one is the most important of all which build

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system do we want to use. Make sure that you choose default.

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Okay. So I'm going to leave this here for a second. You guys can pause the video and double check.

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But I'll go through it one more time. Category is console.

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And before that, make sure that you've checked this little checkbox here.

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So we've got category is console.

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The type is simple executable g++.

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The compiler is your GCC compiler.

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The debugger is the gnu GDB debugger.

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And the build system, very important that it's default. Okay.

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Once we do that, we select okay

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and what you'll see is you'll see over here in the workspace view on the top left.

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You'll see a project, project1 being created under it. So I'm going to click okay.

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And you can see that our first project is here.

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See all this white space over here on the right. That's where we're going to be

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typing our code. So you can expand these

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little chevrons here.

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And you can see that our project1 has a source folder in it,

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that's where our source code is going to be.

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And in there, there's a file called main.cpp.

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That's our first c++ program.

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So I want to see that. I want to edit that. So what I want to do is double click it.

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And when I double click, it it'll show up over here in this white space. So I'm going to double click it.

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And you can see the source code right here.

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And this is what we want to set up.

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Now what I'm going to do is I just installed CodeLite fresh on this system.

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This font is a little bit too small for video. It's probably fine on your end.

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But for video, it's a bit small.

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So I'm just going to go to settings. You don't have to do this.

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But I'm going to set my colors and fonts.

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And let's see. I just want to set my font to

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16,

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something like that. I'll select that,

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and I'll select apply and okay. And

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that should be a little bit more readable for you guys on the video side.

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All right. So we're almost there.

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What we're going to do is, this is actually c code and not c++ code.

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So what I'm going to do is I'm going to delete this code right here,

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and we're going to write our very first c++ program.

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And we're going to do that right now. So I'm going to select all this code here,

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and I'm just going to press backspace or delete just to delete it.

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Now I'm going to type a few lines of code.

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Please just type along,

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follow along. I know you're going to have a lot of questions. You know what does this mean, what does that mean.

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Hang in there, stay tuned as they say.

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It'll all be explained in the course. But first we need to be sure that we've got

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our project set up correctly and that we can run.

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Okay. So let's start. We're going to type pound include

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and then iostream

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in angle brackets and I'm going to press enter.

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Pound include again the pound is the hashtag symbol

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pound include space and iostream in angle brackets.

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That's a less than and a greater than sign on each end.

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Then I'm going to type int

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main

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followed by left parenthesis and a right parenthesis.

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Then I'm going to type in a left curly bracket.

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And notice when I typed in that left curly bracket, I'll do that again.

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I'll type in the left curly note and press enter.

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Notice that the IDE closed it with the right curly.

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Okay. The IDE will do that automatically for you.

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It'll match it up. So right in here, I'm going to type std

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Followed by two columns ::, followed by cout

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a space, two less than signs, again, no space between them <<

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and then I'm going to type hello testing inside double quotes,

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just like that.

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Again, <<std

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::endl;

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and then right here, I'm going to type return zero.

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So let me go through this one more time be sure you get it just right. Int main

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left paren, right paren, open curly,

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std::cout altogether no spaces.

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Then we've got a space << hello testing in

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double quotes.

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Again, << and then std::endl.

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All we're doing is we're including the iostream library

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which allows us to do input output. We're going to do output in this case.

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And in this case, all I want to do is I want to display

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hello testing you can see it right here. I want to display hello testing to the screen.

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And this is how we do it. We output it to the cout, which is our our console.

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And then we're going to put a new line on the end. That's it.

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We're returning zero because we always return zero

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from main. I'll talk more about that later on.

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And that's it.

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Now you'll notice over here, I've got this reddish orange bar

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that's going from 1 to 6.

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That means it's actually red on my system. It might show up orange

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some on video. Sometimes it does. That just means I haven't saved this yet.

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It's really important that I save my file. So I can come up to file,

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save file here or press ctrl s,

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either way.

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I'm just going to press ctrl s, and you'll

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see the color change. I'm going to press ctrl s,

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and notice that now it became green

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that means it's saved. That's really important. Be sure that you save your file

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before you try to build it. Otherwise you may not get what you expect.

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So that's my program. It's a really simple c++ program.

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It's got some stuff in there that I know you've got questions about.

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. As I said, stay tuned, it's all coming.

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Now what we need to do is we need to build this and run it.

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But before we do that, we need to set a few settings for our project.

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So let's do that. Click on your project1 right here.

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Right click on it, and then all the way down at the bottom, we're going to see settings.

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So select settings.

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Now you'll notice that the general is set up right here.

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Right, that that's been selected.

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And all this stuff on the right is stuff that was already set up for us from that

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project wizard,

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the new project wizard. We don't have to mess with any of that.

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What we do have to change is we're going to go to where it says compiler right here.

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And then I'm going to come up to where it says c++ compiler options.

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And right here, you'll see a -g, a -o and a -wall and all this other stuff.

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I'm just going to click on there.

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And you'll see a button that pops up right over here on the right

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with three dots. I want to select that button.

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And now we've got all kinds of options that we can set for the compiler here.

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We're just going to set a few options. Actually, we're going to leave the same options that are there.

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But we want to add one more. We want to click right on here where it says

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enable c++17 features.

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Now in this course, I've used mostly c++14.

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And that's what you're going to see in a lot of the videos.

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But this version supports c++17,

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and they're very very very similar.

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The only differences between them are going to be explained in the course,

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and most of them are more advanced and they're not they're not going to affect learning

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basic foundational modern c++.

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These are the settings we need to have on.

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Enable all compiler warnings,

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enable c++17 features.

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I'll scroll down a little bit here,

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optimize for debugging

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and produce debugging information.

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So those four settings are what you see right down here in the command line.

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So I'm just going to click okay, apply

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and click okay again.

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Now finally we're good to go. Let's run this. We can come up to build,

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and we can type build and run project

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right here. That's what I'm going to do. I'm going to select build and run project.

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And you could see down here a bunch of stuff just happened really quickly.

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First of all, the good thing that happened is we popped up this terminal that says hello testing.

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Hey that's what we wanted, right. That's what our program was supposed to do.

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And then it says hit any key to continue. So I'm just going to press enter.

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There notice the window popped away, which is what also what I want.

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There's two tabs down here that are very important.

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One is the output tab. This is just -- this is not the output of your program.

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This is the output of trying to run your program.

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So this is what opens up that terminal we just saw.

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The other one that's really important is this build tab right here.

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Those are the only two that we generally will use in this class.

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So I'm going to select build.

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And you can see right here that your compiler is being executed.

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You can see those switches, those compiler options right over here that we just set up.

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And the good thing here it says zero error, zero warnings.

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What could go wrong? Well,

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you maybe you forgot this semicolon here.

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And then notice again that I've got that little orange red right here, right. I need to save that.

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So I'm going to ctrl s and save.

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And then again, I'm going to go to build, build and run.

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And notice that I've got errors. Do I want to continue? No, I don't want to continue.

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But notice my build output. You see the error right here.

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It's red. If I select that and click on it,

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it takes me up to the code

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and what happened was here's the error. It's expecting a semicolon.

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So I forgot the semicolon.

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Now if you type this program, again, I'll save it as is -- if you type this program exactly

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like I typed it, you shouldn't get any errors.

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If you do and you post in the forum, I might say something like,

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can you show me your build output? This is what i want to see,

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just copy and paste this stuff or give me a screenshot that way I can

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exactly see what's going on.

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Now typical errors are that forgetting a semicolon,

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forgetting to put a quote mark here. We've got a quote mark here,

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and we've got another one here. Sometimes students will --

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these two parentheses sometimes when they're together, it looks like a 0,

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like that they'll put a 0 in here and that'll be a mistake.

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So this is a left paren followed by a right paren.

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And another common mistake is to to iosteam here.

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I don't know why, but a lot of people do that.

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So it's iosteam that's incorrect, it should be iostream.

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So any one of those will cause an error down here.

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All right. So that's really pretty much it for this video.

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We're all set up to run c++ programs.

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If you have any errors, post them on the forums along with the build output.

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And I'll get back to you with the fix.

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Okay. So let's learn c++.