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What is FEOF used for?
The feof() function indicates whether the end-of-file flag is set for the given stream . The end-of-file flag is set by several functions to indicate the end of the file. The end-of-file flag is cleared by calling the rewind() , fsetpos() , fseek() , or clearerr() functions for this stream.
What does FEOF mean?
The feof() function in PHP is an inbuilt function which is used to test for the end-of-file on a file pointer. It checks if the “end-of-file” has been reached or not. The feof() function is used for looping through the content of a file if the size of content is not known beforehand.
How does FEOF work in C?
Every FILE stream has an internal flag that indicates whether the caller has tried to read past the end of the file already. feof returns that flag. The flag does not indicate whether the current file position is as the end of the file, only whether a previous read has tried to read past the end of the file.
Can you rely on FEOF () function to read from files that are written using binary mode?
1 Answer. You should not use feof() to loop on – instead, use the return value of fread() – loop until it returns zero. This is easy to see if you consider reading an empty file – feof() returns the EOF status AFTER a read operation, so it will always try to read bogus data if used as a loop control.
What is difference between FEOF and EOF functions?
In C/C++, getc() returns EOF when end of file is reached. getc() also returns EOF when it fails. To solve this problem, C provides feof() which returns non-zero value only if end of file has reached, otherwise it returns 0.
Can you rely on FEOF function to read?
feof() can only be used to distinguish between end-of-file and read-error conditions after an input operation failed. Similarly, ferr() can be used to check for read-error after an input operation failed.
What does FEOF mean in C?
Test for End-of-File
(Test for End-of-File) In the C Programming Language, the feof function tests to see if the end-of-file indicator has been set for a stream pointed to by stream.
Why is FEOF wrong?
feof) is wrong because it tests for something that is irrelevant and fails to test for something that you need to know. The result is that you are erroneously executing code that assumes that it is accessing data that was read successfully, when in fact this never happened.
What Fflush does in C?
C Language: fflush function. (Flush File Buffer) In the C Programming Language, the fflush function writes any unwritten data in stream’s buffer. If stream is a null pointer, the fflush function will flush all streams with unwritten data in the buffer.
How is the fscanf function used in Java?
The fscanf () function is used to read set of characters from file. It reads a word from the file and returns EOF at the end of file. int fscanf (FILE *stream, const char *format [, argument.])
Do you check for EOF when you call fscanf?
You should check for EOF when you call fscanf, not check the array slot for EOF. If you have integers in your file fscanf returns 1 until integer occurs.
How is the fprintf function used in Java?
The fprintf () function is used to write set of characters into file. It sends formatted output to a stream. int fprintf (FILE *stream, const char *format [, argument.])