What are common causes for 'fatal error: no such file or directory' when compiling C++ code?

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Grade: Education Subject: Support
What are common causes for 'fatal error: no such file or directory' when compiling C++ code?
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When compiling C++ code, this error often occurs when the compiler cannot find header files (`.h` or `.hpp`). This can happen if the header files are not in the same directory as the source file, not in a standard include path, or if the include directive in your code has a typo or incorrect path.