C Library Function – stdio

The <stdio.h> header shall define the following function(s).

Operations on files Function:

remove	int remove(const char * filename);
rename	int rename( const char * old_filename, const char * new_filename );
tmpfile(C11)	FILE *tmpfile(void);
tmpfile_s(C11)	errno_t tmpfile_s(FILE * restrict * restrict streamptr);
tmpnam(C11)	char *tmpnam( char *filename );
tmpnam_s(C11)	errno_t tmpnam_s(char *filename_s, rsize_t maxsize);

File Access Functions:

fopen	FILE * fopen( const char * filename, const char * mode );
fopen_s(C11)	errno_t fopen_s(FILE * restrict *restrict streamptr, const char * restrict filename, const char * restrict mode);
freopen	FILE * freopen( const char * filename, const char * mode, FILE * stream );
freopen_s(C11)	errno_t freopen_s(FILE * restrict *restrict newstreamptr, const char * restrict filename, const char * restrict mode,FILE * restrict stream);
fclose	int fclose( FILE * stream );
fflush	int fflush( FILE * stream );
setbuf	void setbuf( FILE * stream, char *buffer );
setvbuf	int setvbuf( FILE * stream, char * buffer, int mode, size_t size );

Formatted input/output Functions:

scanf	int scanf( const char * format, ... );
fscanf	int fscanf( FILE * stream, const char * format, ... );
sscanf	int sscanf( const char * buffer, const char * format, ... );
scanf_s(C11)	int scanf_s(const char * restrict format, ...);
fscanf_s(C11)	int fscanf_s(FILE * restrict stream, const char * restrict format, ...);
sscanf_s(C11)	int sscanf_s(const char * restrict buffer, const char * restrict format, ...);
vscanf(C99)	int vscanf( const char * restrict format, va_list arg );
vfscanf(C99)	int vfscanf( FILE * restrict stream, const char * restrict format, va_list arg);
vsscanf(C99)	int vsscanf( const char * restrict buffer, const char * restrict format, va_list arg);
vscanf_s(C11)	int vscanf_s(const char * restrict format, va_list arg);
vfscanf_s(C11)	int vfscanf_s( FILE * restrict stream, const char * restrict format, va_list arg);
vsscanf_s(C11)	int vsscanf_s( const char * restrict buffer, const char * restrict format, va_list arg);
printf	int printf( const char * format, ... );
fprintf	int fprintf( FILE * stream, const char * format, ... );
sprintf	int sprintf( char *buffer, const char * format, ... );
snprintf(C99)	int snprintf( char *restrict buffer, int bufsz, const char * restrict format, ... );
printf_s(C11)	int printf_s(const char * restrict format, ...);
fprintf_s(C11)	int fprintf_s(FILE * restrict stream, const char * restrict format, ...);
sprintf_s(C11)	int sprintf_s(char *restrict buffer, rsize_t bufsz, const char * restrict format, ...);
snprintf_s(C11)	int snprintf_s(char *restrict buffer, rsize_t bufsz, const char * restrict format, ...);
vprintf	int vprintf( const char * format, va_list arg);
vfprintf	int vfprintf( FILE * stream, const char * format, va_list arg);
vsprintf	int vsprintf( char *buffer, const char * format, va_list arg);
vsnprintf(C99)	int vsnprintf( char *restrict buffer, int bufsz, const char * restrict format, va_list arg);
vprintf_s(C11)	int vprintf_s( const char * restrict format, va_list arg);
vfprintf_s(C11)	int vfprintf_s( FILE * restrict stream, const char * restrict format, va_list arg);
vsprintf_s(C11)	int vsprintf_s( char *restrict buffer, rsize_t bufsz, const char * restrict format, va_list arg);
vsnprintf_s(C11)	int vsnprintf_s(char *restrict buffer, rsize_t bufsz, const char * restrict format, va_list arg);

Character input/output Functions:

fgetc	int fgetc( FILE * stream );
getc	int getc( FILE * stream );
fgets	char *fgets( char *str, int count, FILE *stream );
fputc	int fputc( int ch, FILE * stream );
putc	int putc( int ch, FILE * stream );
fputs	int fputs( const char * str, FILE * stream );
getchar	int getchar(void);
gets	char *gets( char *str );
gets_s(C11)	char *gets_s( char *str, rsize_t n );
putchar	int putchar( int ch );
puts	int puts( const char * str );
ungetc	int ungetc( int ch, FILE * stream );

Direct input/output Functions:

fread	size_t fread( void *buffer, size_t size, size_t count, FILE * stream );
fwrite	size_t fwrite( const void *buffer, size_t size, size_t count, FILE * stream );

File positioning Functions:

ftell	long ftell( FILE * stream );
fgetpos	int fgetpos( FILE * stream, fpos_t *pos );
fseek	int fseek( FILE * stream, long offset, int origin );
fsetpos	int fsetpos( FILE * stream, const fpos_t *pos );
rewind	void rewind( FILE * stream );

Error-handling Functions:

clearerr	void clearerr( FILE * stream );
feof	int feof( FILE * stream );
ferror	int ferror( FILE * stream );
perror	void perror( const char * s );

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Related topics:
Library Functions in C   |   Standard Library in C   |   Header Files in C   |   Functions in C   |   Keywords in C   |   Data Types in C   |   Pointers in C

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