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 is FEOF file?

C feof function is used to determine if the end of the file (stream), specified has been reached or not. This function keeps on searching the end of file (eof) in your file program. Syntax: int feof(FILE *stream) Here is a program showing the use of feof().

What is the use of FEOF?

Description. 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 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.

How do you reset a FEOF?

The end-of-file indicator can only be cleared by the function clearerr(). The function ferror() tests the error indicator for the stream pointed to by stream, returning nonzero if it is set. The error indicator can only be reset by the clearerr() function.

Can you rely on FEOF function?

Similarly, ferr() can be used to check for read-error after an input operation failed. Programmers usually ignore the difference between end-of-file and read-error. Hence they only rely on checking if the input operation succeeded or failed. Thus they never use feof() , and so should you.

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.

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.

How does EOF differ from FEOF?

Answer: Main difference EOF is a value to compare upon characters to check whether end of a stream has reached and feof is a function call to check a file pointer has reached end of that file. EOF is a condition in a computer operating system where no more data can be read from a data sources.

Which of the following is used locate the end of the file?

The function feof() is used to check the end of file after EOF. It tests the end of file indicator. It returns non-zero value if successful otherwise, zero.

What is the purpose of library function FEOF ()?

C library function – feof() The C library function int feof(FILE *stream) tests the end-of-file indicator for the given stream.