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Retrieves the current position in the stream.
The function fills the fpos_t object pointed by pos with the information needed from the stream's position indicator to restore the stream to its current position (and multibyte state, if wide-oriented) with a call to fsetpos.
The ftell function can be used to retrieve the current position in the stream as an integer value.
In case of error, errno is set to a platform-specific positive value and the function returns a non-zero value.
Possible output (with myfile.txt containing ABC):
The example opens myfile.txt, then reads the first character once, and then reads 3 times the same second character.
Reference
C library:
- <cassert> (assert.h)
- <cctype> (ctype.h)
- <cerrno> (errno.h)
-
<cfenv> (fenv.h)C++11
- <cfloat> (float.h)
-
<cinttypes> (inttypes.h)C++11
- <ciso646> (iso646.h)
- <climits> (limits.h)
- <clocale> (locale.h)
- <cmath> (math.h)
- <csetjmp> (setjmp.h)
- <csignal> (signal.h)
- <cstdarg> (stdarg.h)
-
<cstdbool> (stdbool.h)C++11
- <cstddef> (stddef.h)
-
<cstdint> (stdint.h)C++11
- <cstdio> (stdio.h)
- <cstdlib> (stdlib.h)
- <cstring> (string.h)
-
<ctgmath> (tgmath.h)C++11
- <ctime> (time.h)
-
<cuchar> (uchar.h)C++11
- <cwchar> (wchar.h)
- <cwctype> (wctype.h)
Containers:
-
<array>C++11
- <deque>
-
<forward_list>C++11
- <list>
- <map>
- <queue>
- <set>
- <stack>
-
<unordered_map>C++11
-
<unordered_set>C++11
- <vector>
-
Input/Output:
Multi-threading:
-
<atomic>C++11
-
<condition_variable>C++11
-
<future>C++11
-
<mutex>C++11
-
<thread>C++11
-
Other:
- <algorithm>
- <bitset>
-
<chrono>C++11
-
<codecvt>C++11
- <complex>
- <exception>
- <functional>
-
<initializer_list>C++11
- <iterator>
- <limits>
- <locale>
- <memory>
- <new>
- <numeric>
-
<random>C++11
-
<ratio>C++11
-
<regex>C++11
- <stdexcept>
- <string>
-
<system_error>C++11
-
<tuple>C++11
-
<type_traits>C++11
-
<typeindex>C++11
- <typeinfo>
- <utility>
- <valarray>
<cstdio> (stdio.h)
functions
- clearerr
- fclose
- feof
- ferror
- fflush
- fgetc
- fgetpos
- fgets
- fopen
- fprintf
- fputc
- fputs
- fread
- freopen
- fscanf
- fseek
- fsetpos
- ftell
- fwrite
- getc
- getchar
- gets
- perror
- printf
- putc
- putchar
- puts
- remove
- rename
- rewind
- scanf
- setbuf
- setvbuf
-
snprintfC++11
- sprintf
- sscanf
- tmpfile
- tmpnam
- ungetc
- vfprintf
-
vfscanfC++11
- vprintf
-
vscanfC++11
-
vsnprintfC++11
- vsprintf
-
vsscanfC++11
objects
types
macro constants
function
<cstdio>
fgetpos
int fgetpos ( FILE * stream, fpos_t * pos );
Get current position in stream
The function fills the fpos_t object pointed by pos with the information needed from the stream's position indicator to restore the stream to its current position (and multibyte state, if wide-oriented) with a call to fsetpos.
The ftell function can be used to retrieve the current position in the stream as an integer value.
Parameters
Return Value
On success, the function returns zero.In case of error, errno is set to a platform-specific positive value and the function returns a non-zero value.
Example
|
|
1st character is A 2nd character is B 2nd character is B 2nd character is B |
The example opens myfile.txt, then reads the first character once, and then reads 3 times the same second character.
See also
- fsetpos
- Set position indicator of stream (function)
- ftell
- Get current position in stream (function)
- fseek
- Reposition stream position indicator (function)
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