Language C++----Questions and Answers---Page 3

Question - What is the difference between #include <filename> and #include “filename”?
Answer -
The difference is in the location where the preprocessor searches for the included file.
For #include "filename" the preprocessor searches in the same directory as the file containing the directive. This method is normally used to include programmer-defined header files.
For #include <filename> the preprocessor searches in an implementation dependent manner, normally in search directories pre-designated by the compiler/IDE. This method is normally used to include standard library header files.

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