Does fgetc read EOF?

The fgetc() function returns the character that is read as an integer. An EOF return value indicates an error or an end-of-file condition. Use the feof() or the ferror() function to determine whether the EOF value indicates an error or the end of the file. The file is not open for read operations.

How can you tell if a character is EOF?

Fgetc() function returns a value of int type. Namely, it can return a number from 0 to 255 or -1 (EOF). The values read are placed into a variable of char type. Because of this, a symbol with the 0xFF (255) value turns into -1, and then is handled in the same way as the end of file (EOF).

What does fgetc return failed?

If a read error occurs, the error indicator for the stream shall be set, fgetc() shall return EOF, [CX] and shall set errno to indicate the error.

Is fgetc thread safe?

Between a write and a subsequent read, there must be an intervening flush or reposition. Between a read and a subsequent write, there must also be an intervening flush or reposition unless an EOF has been reached. fgetc_unlocked() is functionally equivalent to fgetc() with the exception that it is not thread-safe.

What is the difference between Fgets and fgetc?

difference between the fgetc() and fgets()? fgets() will read the whole string upto the size specified in argument list but when end of line occurs fgetc() returns EOF while fgets() returns NULL .

What data type is EOF?

EOF is not a character, but a state of the filehandle. While there are there are control characters in the ASCII charset that represents the end of the data, these are not used to signal the end of files in general. For example EOT (^D) which in some cases almost signals the same.

What exactly is EOF?

From Wikipedia, the free encyclopedia. In computing, end-of-file (EOF) is a condition in a computer operating system where no more data can be read from a data source. The data source is usually called a file or stream.

What is the difference between fgetc and GETC?

getc returns the next character from the named input stream. fgetc behaves like getc, but is a genuine function, not a macro; it may therefore be used as an argument. fgetc runs more slowly than getc, but takes less space per invocation.

Is fprintf thread-safe?

Therefore fprintf is thread-safe.

Is writing to stdout thread-safe?

It’s thread-safe; printf should be reentrant, and you won’t cause any strangeness or corruption in your program. You can’t guarantee that your output from one thread won’t start half way through the output from another thread.

When to use GETC ( ) and EOF ( )?

In C/C++, getc() returns EOF when end of file is reached. getc() also returns EOF when it fails. So, only comparing the value returned by getc() with EOF is not sufficient to check for actual end of file. To solve this problem, C provides feof() which returns non-zero value only if end of file has reached, otherwise it returns 0.

What does fgetc return on end of file?

In the book Linux System Programming I have read some like this: fgetc returns the character read as an unsigned char cast to an int or EOF on end of file or error. A common error using fgetc is: char c; if ( (c = fgetc ()) != EOF) {…}

What happens when EOF is reached in fgets?

If EOF is reached it mean that no match are found in the users file and the loop breaks. Can someone give me some tips or suggests? fgets () return a null pointer when it reaches end-of-file or an error condition.

Is it enough to just check EOF in Stack Overflow?

– Stack Overflow fgetc (): Is it enough to just check EOF? If a read error occurs, the error indicator for the stream shall be set, fgetc () shall return EOF, [CX] and shall set errno to indicate the error. So need I check this too?