Learn and Master C Programming - Nesting Header Files & Multiple Inclusion Problem

The video tutorial discusses the concept of nested includes in programming, advising against their use unless necessary. It introduces the double inclusion problem, where a header file is included multiple times, causing compilation errors. Two solutions are presented: using conditional inclusion with ifndef and using pragma once. A demonstration in Visual Studio shows how to set up a project and solve the multiple inclusion problem. The tutorial concludes with best practices for organizing code, recommending that functions be placed in source files rather than header files.

Explain the use of 'pragma once' in header files.

Why is it important to avoid multiple inclusions in a project?

What is the recommended practice regarding code in header files?