We are going to create a simple program and run one of the many open source code analyzers that are available to check for potential issues. Follow these steps:

1. Go to the ~/test/returns directory, which we created as part of the previous recipe.
2. Install the cppcheck tool from the repository. Make sure you are under the root account, not user:

# apt-get install cppcheck

3. Change to the user account again:

# su - user
$

4. Run cppcheck against the returns.cpp file:

$ cppcheck --std=posix --enable=warning returns.cpp

5. Analyze its output.