C-style file input/output

From Cppreference

C++ Standard Library
Language Utilities library Strings library Containers library Algorithms library Iterators library Numerics library Input/output library Localizations library Regular expressions library (C++11) Atomic operations library (C++11) Thread support library (C++11)
Input/output library
basic_streambuf basic_filebuf basic_stringbuf ios_base basic_ios basic_istream basic_ostream basic_iostream basic_ifstream basic_ofstream basic_fstream basic_istringstream basic_ostringstream basic_stringstream I/O manipulators C-style I/O
C-style I/O
Functions File access fopen freopen fflush fclose setbuf setvbuf Direct input/output fread fwrite Unformatted input/output fgetc fgets fputc fputs getchar gets putchar puts ungetc fgetwc fgetws fputwc fputws getwchar putwchar ungetwc Formatted input/output scanf fscanf sscanf vscanf vfscanf vsscanf (C++11) (C++11) (C++11) printf fprintf sprintf snprintf (C++11) vprintf vfprintf vsprintf vsnprintf (C++11) wscanf fwscanf swscanf vwscanf vfwscanf vswscanf (C++11) (C++11) (C++11) wprintf fwprintf swprintf vwprintf vfwprintf vswprintf File positioning ftell fgetpos fseek fsetpos rewind Error handling clearerr feof ferror perror Operations on files remove rename tmpfile tmpnam

The <cstdio> header provides generic file operation support and supplies functions with narrow character input/output capabilities.

The <cwchar> header supplies functions with wide character input/output capabilities.

Contents 1 Functions 1.1 File access 1.2 Direct input/output 1.3 Unformatted input/output 1.4 Narrow character 1.5 Wide character 1.6 Formatted input/output 1.7 Narrow character 1.8 Wide character 1.9 File positioning 1.10 Error handling 1.11 Operations on files 2 Macros

[edit] Functions

File access
fopen	opens a file (function)
freopen	open an existing stream with a different name (function)
fflush	synchronizes an output stream with the actual file (function)
fclose	closes a file (function)
setbuf	sets the buffer for a file stream (function)
setvbuf	sets the buffer and its size for a file stream (function)
fwide	switches a file stream between wide character I/O and narrow character I/O (function)
Direct input/output
fread	reads from a file (function)
fwrite	writes to a file (function)
Unformatted input/output
Narrow character
fgetc getc	gets a character from a file stream (function)
fgets	gets a character string from a file stream (function)
fputc putc	writes a character to a file stream (function)
fputs	writes a character string to a file stream (function)
getchar	reads a character from stdin (function)
gets	reads a character string from stdin (function)
putchar	writes a character to stdout (function)
puts	writes a character string to stdout (function)
ungetc	puts a character back into a file stream (function)
Wide character
fgetwc getwc	gets a wide character from a file stream (function)
fgetws	gets a wide character string from a file stream (function)
fputwc putwc	writes a wide character to a file stream (function)
fputws	writes a wide character string to a file stream (function)
getwchar	reads a wide character from stdin (function)
putwchar	writes a wide character to stdout (function)
ungetwc	puts a wide character back into a file stream (function)
Formatted input/output
Narrow character
scanf fscanf sscanf	reads formatted input from stdin, a file stream or a buffer (function)
vscanf vfscanf vsscanf (C++11) (C++11) (C++11)	reads formatted input from stdin, a file stream or a buffer using variable argument list (function)
printf fprintf sprintf snprintf (C++11)	prints formatted output to stdout, a file stream or a buffer (function)
vprintf vfprintf vsprintf vsnprintf (C++11)	prints formatted output to stdout, a file stream or a buffer using variable argument list (function)
Wide character
wscanf fwscanf swscanf	reads formatted wide character input from stdin, a file stream or a buffer (function)
vwscanf vfwscanf vswscanf (C++11) (C++11) (C++11)	reads formatted wide character input from stdin, a file stream or a buffer using variable argument list (function)
wprintf fwprintf swprintf	prints formatted wide character output to stdout, a file stream or a buffer (function)
vwprintf vfwprintf vswprintf	prints formatted wide character output to stdout, a file stream or a buffer using variable argument list (function)
File positioning
ftell	returns the current file position indicator (function)
fgetpos	gets the file position indicator (function)
fseek	moves the file position indicator to a specific location in a file (function)
fsetpos	moves the file position indicator to a specific location in a file (function)
rewind	moves the file position indicator to the beginning in a file (function)
Error handling
clearerr	clears errors (function)
feof	checks for the end-of-file (function)
ferror	checks for a file error (function)
perror	displays a character string corresponding of the current error to stderr (function)
Operations on files
remove	erases a file (function)
rename	renames a file (function)
tmpfile	returns a pointer to a temporary file (function)
tmpnam	returns an unique filename (function)

[edit] Macros

This section is incomplete