also: ヘッダファイル
header file
Computing term for a file (typically .h in C/C++) containing declarations and macros to be shared across source files.
This header file contains function prototypes.
I got a compilation error and realized I forgot to include the necessary header file.
Variant without the long vowel mark; less common but still used.
Spelling with interpunct; sometimes seen in technical writing.
Rare variant without long vowel mark and with interpunct.
Loanword from English 'header file', used in programming contexts.