Nov 26, 2015 · If I define a global variable in a .c file, how can I use the same variable in another .c file? file1.c:

3 I know that global variables in C sometimes have the extern keyword. What is an extern variable? What is the declaration like? What is its scope? This is related to sharing variables across source files, but …

Nov 4, 2023 · The extern keyword in C allows declarations for global variables and functions to be visible across multiple source files without having to define them multiple times. Using extern is a key aspect …

C global variables can be accessed across multiple files using the extern keyword. When a global variable is declared in one file, it can be made available to other files by declaring it as extern in those …

Dec 14, 2024 · This lesson discusses the most common ways to do this. Global constants as internal variables Prior to C++17, the following is the easiest and most common solution: Create a header file …

Oct 17, 2021 · Hi guys, While developing I like do organize my code into multiple files, according to functionalities. One thing I usually have to do, is access a global variable between those files. I usually …

Jul 23, 2025 · In C++, extern is a keyword that helps in sharing variables, and functions declared in one file to all the other files. In this article, we will learn how we can use the extern keyword to share …

Nov 16, 2025 · Static global variables enforce encapsulation, but they can be accessed from other files using getter and setter functions. These functions provide controlled, dynamic access to the static …