It’s very easy to start C/C++ on Mac.
Contents
Install Xcode and Command line tools
You need to install Xcode. Open App Store and install “Xcode”.
Editor
Various free editors are available. You can choose whatever you like. Usually, I use CLion. As for the free editor, I recommend visual studio code.
Download and Install
Visit https://code.visualstudio.com/.
Download and install visual studio code.

Install C/C++ extension.
Open visual studio code and install C/C++ extension. It makes your coding easy.

Write code
File->new file and write down (or copy and paste) the following code.
Save the file (File -> Save As) as “HelloWorld.cpp”.
Open terminal
Open terminal and move to the directory where you save HelloWorld.cpp. Compile HelloWorld.cpp as follows.
> c++ HelloWorld.cpp
> ./a.out
Hello, World!
You can see “Hello World!”. Congratulations.