Stream Input/Output

Formatted Input/Output

Function	Header File	Page	Description
`fprintf()`	stdio.h	fprintf() — Write Formatted Data to a Stream	Formats and prints characters to the output stream.
`fscanf()`	stdio.h	fscanf() — Read Formatted Data	Reads data from a stream into locations given by arguments.
`fwprintf()`	stdio.h	fwprintf() — Format Data as Wide Characters and Write to a Stream	Formats data as wide characters, and writes to a stream.
`fwscanf()`	stdio.h	fwscanf() — Read Data from Stream Using Wide Character	Reads wide data from stream into locations given by arguments.
`printf()`	stdio.h	printf() — Print Formatted Characters	Formats and prints characters to `stdout`.
`scanf()`	stdio.h	scanf() — Read Data	Reads data from `stdin` into locations given by arguments.
`snprintf()`	stdio.h	snprintf() — Print Formatted Data to Buffer	Same as `sprintf`, except that the `snprintf()` function will stop after n characters have been written to a buffer.
`sprintf()`	stdio.h	sprintf() — Print Formatted Data to Buffer	Formats and writes characters to a buffer.
`sscanf()`	stdio.h	sscanf() — Read Data	Reads data from a buffer into locations given by arguments.
`swprintf()`	wchar.h	swprintf() — Format and Write Wide Characters to Buffer	Formats and writes wide characters to buffer.
`swscanf()`	wchar.h	swscanf() — Read Wide Character Data	Reads wide data from a buffer into locations given by arguments.
`vfprintf()`	stdio.h stdarg.h	vfprintf() — Print Argument Data to Stream	Formats and prints characters to the output stream using a variable number of arguments.
`vfscanf()`	stdarg.h stdio.h	vfscanf() — Read Formatted Data	Reads data from a specified stream into locations given by a variable number of arguments.
`vfwprintf()`	stdio.h stdarg.h	vfwprintf() — Format Argument Data as Wide Characters and Write to a Stream	Formats argument data as wide characters and writes to a stream using a variable number of arguments.
`vfwscanf()`	stdarg.h stdio.h	vfwscanf() — Read Formatted Wide Character Data	Reads wide data from a specified stream into locations given by a variable number of arguments.
`vprintf()`	stdarg.h stdio.h	vprintf() — Print Argument Data	Formats and writes characters to `stdout` using a variable number of arguments.
`vscanf()`	stdarg.h stdio.h	vscanf() — Read Formatted Data	Reads data from `stdin` into locations given by a variable number of arguments.
`vsnprintf()`	stdio.h stdarg.h	vsnprintf() — Print Argument Data to Buffer	Same as `vsprintf`, except that the `vsnprintf` function will stop after n characters have been written to a buffer.
`vsprintf()`	stdarg.h stdio.h	vsprintf() — Print Argument Data to Buffer	Formats and writes characters to a buffer using a variable number of arguments.
`vsscanf()`	stdarg.h stdio.h	vsscanf() — Read Formatted Data	Reads data from a buffer into locations given by a variable number of arguments.
`vswprintf()`	wchar.h stdarg.h	vswprintf() — Format and Write Wide Characters to Buffer	Formats and writes wide characters to buffer using a variable number of arguments.
`vswscanf()`	stdarg.h wchar.h	vswscanf() — Read Formatted Wide Character Data	Reads wide data from a buffer into locations given by a variable number of arguments.
`vwprintf()`	wchar.h stdarg.h	vwprintf() — Format Argument Data as Wide Characters and Print	Formats and writes wide characters to `stdout` using a variable number of arguments.
`vwscanf()`	stdarg.h stdio.h	vwscanf() — Read Formatted Wide Character Data	Reads wide data from `stdin` into locations given by a variable number of arguments.
`wprintf()`	stdio.h	wprintf() — Format Data as Wide Characters and Print	Formats and writes wide characters to `stdout`
`wscanf()`	stdio.h	wscanf() — Read Data Using Wide-Character Format String	Reads wide data from `stdin` into locations given by arguments.

Character and String Input/Output

Function	Header File	Page	Description
`fgetc()`	stdio.h	fgetc() — Read a Character	Reads a character from a specified input stream.
`fgets()`	stdio.h	fgets() — Read a String	Reads a string from a specified input stream.
`fgetwc()`	stdio.h	fgetwc() — Read Wide Character from Stream	Reads a wide character from a specified stream.
`fgetws()`	stdio.h	fgetws() — Read Wide-Character String from Stream	Reads a wide-character string from a specified stream.
`fputc()`	stdio.h	fputc() — Write Character	Prints a character to a specified output stream.
`_fputchar()`	stdio.h	_fputchar - Write Character	Writes a character to stdout.
`fputs()`	stdio.h	fputs() — Write String	Prints a string to a specified output stream.
`fputwc()`	stdio.h	fputwc() — Write Wide Character	Writes a wide character to a specified stream.
`fputws()`	stdio.h	fputws() — Write Wide-Character String	Writes a wide-character string to a specified stream.
`getc()`	stdio.h	getc() – getchar() — Read a Character	Reads a character from a specified input stream.
`getchar()`	stdio.h	getc() – getchar() — Read a Character	Reads a character from `stdin`.
`gets()`	stdio.h	gets() — Read a Line	Reads a line from `stdin`.
`getwc()`	stdio.h	getwc() — Read Wide Character from Stream	Reads a wide character from a specified stream.
`getwchar()`	stdio.h	getwchar() — Get Wide Character from stdin	Gets a wide character from `stdin`.
`putc()`	stdio.h	putc() – putchar() — Write a Character	Prints a character to a specified output stream.
`putchar()`	stdio.h	putc() – putchar() — Write a Character	Prints a character to `stdout`.
`puts()`	stdio.h	puts() — Write a String	Prints a string to `stdout`.
`putwc()`	stdio.h	putwc() — Write Wide Character	Writes a wide character to a specified stream.
`putwchar()`	stdio.h	putwchar() — Write Wide Character to stdout	Writes a wide character to `stdout`.
`ungetc()`	stdio.h	ungetc() — Push Character onto Input Stream	Pushes a character back onto a specified input stream.
`ungetwc()`	stdio.h	ungetwc() — Push Wide Character onto Input Stream	Pushes a wide character back onto a specified input stream.

Direct Input/Output

Function	Header File	Page	Description
`fread()`	stdio.h	fread() — Read Items	Reads items from a specified input stream.
`fwrite()`	stdio.h	fwrite() — Write Items	Writes items to a specified output stream.

File Positioning

Function	Header File	Page	Description
`fgetpos()`	stdio.h	fgetpos() — Get File Position	Gets the current position of the file pointer.
`fseek()`	stdio.h	fseek() — fseeko() — Reposition File Position	Moves the file pointer to a new location.
`fseeko()`	stdio.h	fseek() — fseeko() — Reposition File Position	Same as `fseek()`.
`fsetpos()`	stdio.h	fsetpos() — Set File Position	Moves the file pointer to a new location.
`ftell()`	stdio.h	ftell() — ftello() — Get Current Position	Gets the current position of the file pointer.
`ftello()`	stdio.h	ftell() — ftello() — Get Current Position	Same as `ftell()`.
`rewind()`	stdio.h	rewind() — Adjust Current File Position	Repositions the file pointer to the beginning of the file.

File Access

Function	Header File	Page	Description
`fclose()`	stdio.h	fclose() — Close Stream	Closes a specified stream.
`fdopen()`	stdio.h	fdopen() — Associates Stream With File Descriptor	Associates an input or output stream with a file.
`fflush()`	stdio.h	fflush() — Write Buffer to File	Causes the system to write the contents of a buffer to a file.
`fopen()`	stdio.h	fopen() — Open Files	Opens a specified stream.
`freopen()`	stdio.h	freopen() — Redirect Open Files	Closes a file and reassigns a stream.
`fwide()`	stdio.h	fwide() — Determine Stream Orientation	Determines stream orientation.
`setbuf()`	stdio.h	setbuf() — Control Buffering	Allows control of buffering.
`setvbuf()`	stdio.h	setvbuf() — Control Buffering	Controls buffering and buffer size for a specified stream.
`wfopen()`	stdio.h	wfopen() —Open Files	Opens a specified stream, accepting file name and mode as wide characters.

File Operations

Function	Header File	Page	Description
`fileno()`	stdio.h	fileno() — Determine File Handle	Determines the file handle.
`remove()`	stdio.h	remove() — Delete File	Deletes a specified file.
`rename()`	stdio.h	rename() — Rename File	Renames a specified file.
`tmpfile()`	stdio.h	tmpfile() — Create Temporary File	Creates a temporary file and returns a pointer to that file.
`tmpnam()`	stdio.h	tmpnam() — Produce Temporary File Name	Produces a temporary file name.

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