Write a Hello World application with C++

Launch Geany:

Select Project > New:

Name the project hello_world_cpp:

The fields represent the following:

• Name — The name of the project.
• Filename — The filepath of the project, where the project settings are stored. This path generally ends in .geany.
• Base path — The base path of all files making up the project.

When prompted to create the directory, select OK:

Write a Hello World sample application. Save it as hello_world.cpp:

Select Build > Compile to compile the source:

Select Build > Build to create an executable for the code:

Select Build > Execute to execute the code in a terminal window:

Try the linting function by adding the following code before your main() function:

std::string hi_again("hello");

Add the following after "Hello World!" print statement:

std::cout << hi_again;

Select Build > Lint:

You should see a warning about a non-const global variable:

Add in a const before the global string variable and run lint again. The warning should disappear:

Next, try debugging the Hello World sample. Select Build > Set Build Commands.

Select the Build tab, then update the Compile and Build commands to include the -g flag:

Select Debug > Setup Program to set up the program to be debugged.

Enter the full path to the hello_world executable, then click OK:

Set a breakpoint on the print statement. Click the print statement line in the IDE, then select Debug > Toggle Breakpoint:

Select Debug > Run/Continue to run the debugger:

Once the breakpoint has been hit, select Debug > Run/Continue or Debug > Step Over: