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Showing content from https://en.cppreference.com/w/cpp/language/../algorithm/../ranges/../io/c/feof.html below:

std::feof - cppreference.com

Checks if the end of the given file stream has been reached.

[edit] Parameters stream - the file stream to check [edit] Return value

Nonzero value if the end of the stream has been reached, otherwise ​0​.

[edit] Notes

This function only reports the stream state as reported by the most recent I/O operation, it does not examine the associated data source. For example, if the most recent I/O was a std::fgetc, which returned the last byte of a file, std::feof returns zero. The next std::fgetc fails and changes the stream state to end-of-file. Only then std::feof returns non-zero.

In typical usage, input stream processing stops on any error; feof and std::ferror are then used to distinguish between different error conditions.

[edit] Example

Output:

End of file reached successfully
[edit] See also

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