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16 lip 2021 · ftell returns the file position indicator for a file stream in bytes or characters, depending on the mode. See the definition, parameters, return value, error handling, and example code for ftell.
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29 lis 2022 · Returns the current value of the file position indicator for the file stream stream. If the stream is open in binary mode, the value obtained by this function is the number of bytes from the beginning of the file.
7 cze 2023 · ftell() in C is used to find out the position of the file pointer in the file with respect to starting of the file. Syntax. The syntax of ftell() is: long ftell(FILE *stream); Parameters. stream: It is the pointer to the file stream. Return Value. It returns a long integer value as the current position in the file. It returns -1 if an error occurs.
Definition and Usage. The ftell() function returns the value of position indicator. This is the position in the file where the next read or write operation will be done. The ftell() function is defined in the <stdio.h> header file.
1 gru 2022 · The ftell and _ftelli64 functions retrieve the current position of the file pointer (if any) associated with stream. The position is expressed as an offset relative to the beginning of the stream. When a file is opened for appending data, the current file position is determined by the last I/O operation, not by where the next write would occur.
Opis. [edytuj] Funkcja ftell zwraca aktualną pozycję wskaźnika pliku. Wartość zwracana. [edytuj] Patrz wyżej. Przykład użycia. [edytuj]
Using standard library: Assuming that your implementation meaningfully supports SEEK_END: fseek(f, 0, SEEK_END); // seek to end of file. size = ftell(f); // get current file pointer. fseek(f, 0, SEEK_SET); // seek back to beginning of file. // proceed with allocating memory and reading the file.
