.H Extensão de arquivo
C/C++/Objective-C Header File
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O que é um arquivo H?
An H file is a header file referenced by a document written in C, C++, or Objective-C source code. It may contain variables, constants, and functions that are used by other files within a programming project. H files allow commonly used functions to be written only once and referenced by other source files when needed.
Mais informações
H header files are typically used to store C function declarations, as well as macro definitions, which can be used by multiple source files. Header files can be inserted into a .C source code file using the #include directive.
NOTA: H files may also store headers for C++ source code, but those headers are typically saved as .HPP files.
Como abrir um arquivo H
Since header files are plain text files, you can open and view the file contents in a text editor. However, it's easier to edit *.h files and other source code files using a code editor like Microsoft Visual Studio or Apple Xcode. These editors provide helpful programming tools like line numbers, syntax highlighting, and source code error checking.