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C++ Language > Learn C++ Language > What is the #include directive in C++?
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What is the #include directive in C++?

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#include is a way of including a standard or user-defined file in the program and is mostly written at the beginning of any C/C++ program. The #include preprocessor directive is read by the preprocessor and instructs it to insert the contents of a user-defined or system header file in our C/C++ progr...
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#include is a way of including a standard or user-defined file in the program and is mostly written at the beginning of any C/C++ program. The #include preprocessor directive is read by the preprocessor and instructs it to insert the contents of a user-defined or system header file in our C/C++ program

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Experienced Computer trainer having worked in IT sector for 20 years.

#include is a way of including a standard or user-defined file in the program and is mostly written at the beginning of any C/C++ program. The #include preprocessor directive is read by the preprocessor and instructs it to insert the contents of a user-defined or system header file in our C/C++ program....
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#include is a way of including a standard or user-defined file in the program and is mostly written at the beginning of any C/C++ program. The #include preprocessor directive is read by the preprocessor and instructs it to insert the contents of a user-defined or system header file in our C/C++ program. These files are mainly imported from outside header files.

 

The process of importing such files that might be system-defined or user-defined is known as File Inclusion. This preprocessor directive tells the compiler to include a file in the source code program.

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