@node Stdio@chapter Input and Output (@file{stdio.h}) This chapter comprises functions to manage filesor other input/output streams. Among these functions are subroutinesto generate or scan strings according to specifications from a format string. The underlying facilities for input and output depend on the hostsystem, but these functions provide a uniform interface.The corresponding declarations are in @file{stdio.h}.The reentrant versions of these functions use macros@example_stdin_r(@var{reent})_stdout_r(@var{reent})_stderr_r(@var{reent})@end example@noindentinstead of the globals @code{stdin}, @code{stdout}, and@code{stderr}.  The argument <[reent]> is a pointer to a reentrancystructure. @menu  * clearerr::    Clear file or stream error indicator* fclose::      Close a file* feof::        Test for end of file* ferror::      Test whether read/write error has occurred* fflush::      Flush buffered file output* fgetc::       Get a character from a file or stream* fgetpos::     Record position in a stream or file* fgets::       Get character string from a file or stream* fiprintf::    Write formatted output to file (integer only)* fopen::       Open a file* fdopen::	Turn an open file into a stream* fputc::       Write a character on a stream or file* fputs::       Write a character string in a file or stream* fread::       Read array elements from a file* freopen::     Open a file using an existing file descriptor* fseek::       Set file position* fsetpos::     Restore position of a stream or file* ftell::       Return position in a stream or file* fwrite::      Write array elements from memory to a file or stream* getc::        Get a character from a file or stream (macro)* getchar::     Get a character from standard input (macro)* gets::        Get character string from standard input (obsolete)* getw::        Get a word (int) from a file or stream* iprintf::     Write formatted output (integer only)* mktemp::      Generate unused file name* perror::      Print an error message on standard error* putc::        Write a character on a stream or file (macro)* putchar::     Write a character on standard output (macro)* puts::        Write a character string on standard output* putw::        Write a word (int) to a file or stream* remove::      Delete a file's name* rename::      Rename a file* rewind::      Reinitialize a file or stream* setbuf::      Specify full buffering for a file or stream* setvbuf::     Specify buffering for a file or stream* siprintf::    Write formatted output (integer only)* printf::      Write formatted output* scanf::       Scan and format input* tmpfile::     Create a temporary file* tmpnam::      Generate name for a temporary file* vprintf::     Format variable argument list@end menu @page@include stdio/clearerr.def@page@include stdio/fclose.def@page@include stdio/feof.def@page@include stdio/ferror.def@page@include stdio/fflush.def@page @include stdio/fgetc.def @page@include stdio/fgetpos.def@page @include stdio/fgets.def @page@include stdio/fiprintf.def@page@include stdio/fopen.def@page@include stdio/fdopen.def@page@include stdio/fputc.def@page@include stdio/fputs.def@page@include stdio/fread.def@page@include stdio/freopen.def@page@include stdio/fseek.def@page@include stdio/fsetpos.def@page@include stdio/ftell.def@page@include stdio/fwrite.def@page @include stdio/getc.def @page@include stdio/getchar.def @page @include stdio/gets.def@page @include stdio/getw.def @page@include stdio/iprintf.def @page@include stdio/mktemp.def@page@include stdio/perror.def@page@include stdio/putc.def@page@include stdio/putchar.def@page@include stdio/puts.def@page @include stdio/putw.def @page@include stdio/remove.def@page@include stdio/rename.def@page@include stdio/rewind.def@page@include stdio/setbuf.def@page@include stdio/setvbuf.def@page @include stdio/siprintf.def @page @include stdio/sprintf.def @page@include stdio/sscanf.def @page@include stdio/tmpfile.def@page@include stdio/tmpnam.def@page @include stdio/vfprintf.def