shared c constants in a header - Stack Overflow
I want to share certain C string constants across multiple c files. The constants span multiple lines for readability:
7.10 — Sharing global constants across multiple files (using ...
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: …
C++ Static Member Initialization: Header vs. Source File
Jul 22, 2025 · Use const int or constexpr for compile-time constants: These can be initialized in the header. Use C++17 inline for header-only initialization of non-const static members: This is …
Static const variable declaration in a header file
How do you define a constant in a header file? You need to do: to make a constant pointer, so that the rule will apply to it. Also note that this is one reason I prefer to consistently put const …
Constants in C - GeeksforGeeks
Nov 1, 2025 · In C programming, const is a keyword used to declare a variable as constant, meaning its value cannot be changed after it is initialized. It is mainly used to protect variables …
const (C++) | Microsoft Learn
Mar 13, 2023 · In C, constant values default to external linkage, so they can appear only in source files. In C++, constant values default to internal linkage, which allows them to appear in header …
Define constant variables in C++ header - Stack Overflow
Nov 29, 2018 · You generally shouldn't use e.g. const int in a header file, if it's included in several source files. That is because then the variables will be defined once per source file (translation …
C data types - Wikipedia
The maximum size of size_t is provided via SIZE_MAX, a macro constant which is defined in the <stdint.h> header. size_t is guaranteed to be at least 16 bits wide. Additionally, POSIX …