Learn and Master C Programming - Using 'extern' Keyword in our code

The video tutorial guides viewers through creating a new C project in Visual Studio, focusing on using the extern keyword to manage global variables across multiple files. It covers setting up the project, implementing functions, resolving compilation errors, and using forward declarations. The tutorial concludes with successfully compiling and running the project, demonstrating the output of global variable manipulation.

Describe the process of fixing the compilation error related to the Foo function.

What is the output of the program after successfully compiling and running it?