1. Open a terminal or command prompt on your computer.
2. Enter the following command to install the Haxe library for C++:
haxelib install cpp
3. Wait for the installation process to complete. The command will download and install the necessary files and dependencies for Haxe targeting C++.
4. Once the installation is finished, you can use the Haxe programming language to write code targeting C++.
Note: Ensure that you have Haxe installed on your system before running the above command. Additionally, make sure your system meets any requirements specified by the Haxe library for C++.