What is FEOF with example?

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. Output: C feof function returns true in case end of file is reached, otherwise it’s return false.

Why is while FEOF always wrong?

while(! 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 function in C++?

The feof() function in C++ checks if the end of the file associated with the given file stream has been reached or not.

What is the purpose of FEOF ()?

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.

How does FEOF work in C?

The feof function returns a nonzero value if the end-of-file indicator is set. Otherwise, it returns zero.

What does FEOF () return if end-of-file was reached?

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 difference between EOF and FEOF?

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.

Can you rely on FEOF () function?

No, don’t use feof() to detect the end of the file. Instead check for a read failure, for example fgets() will return NULL if it attempts to read past the end of the file whereas feof() will return 0 until some function attempts to read past the end of the file, only after that it returns non-zero.

How does Fgets work in C?

C library function – fgets() The C library function char *fgets(char *str, int n, FILE *stream) reads a line from the specified stream and stores it into the string pointed to by str. It stops when either (n-1) characters are read, the newline character is read, or the end-of-file is reached, whichever comes first.

What is difference between FEOF and EOF functions?

Can u rely on FEOF () function?

1 Answer. You should not use feof() to loop on – instead, use the return value of fread() – loop until it returns zero.

Does FEOF move the file pointer?

feof () function finds end of file. SEEK_END moves file pointer position to the end of file. ftell () ftell () function gives current position of file pointer.

What is the use of feof function in C?

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.

What is the syntax of the while loop in C programming?

The syntax of the while loop in c programming is given as while(expression) { body of while loop } statement-n; From the above syntax, we have to use while keyword. The expression is nothing but a Boolean expression that means it evaluates to a true or false value.

What is the difference between fread() and feof()?

The purpose of feof () is NOT to check if the next read will reach the end of file. The purpose of feof () is to distinguish between a read error and having reached the end of the file. If fread () returns 0, you must use feof / ferror to decide whether an error was encountered or if all of the data was consumed.

Why does feof() not return true in all cases?

This happens in all such cases. feof() does not return true until after a read on the stream encounters the end of file. The purpose of feof() is NOT to check if the next read will reach the end of file. The purpose of feof() is to distinguish between a read error and having reached the end of the file.