Question

What is the header file contain

Answer 1

Answer:

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Explanation:

Many programming languages and other computer files have a directive, often called include, that causes the contents of a second file to be inserted into the original file. These included files are called copybooks or header files.

Answer 2

Answer:

A header file is a file containing C declarations and macro definitions (see Macros) to be shared between several source files. You request the use of a header file in your program by including it, with the C preprocessing directive ' #include '. Header files serve two purposes.