David Nugent's iostreams (C++) tutorial

See Also

How can I recover the file name given an open file descriptor? []

What's wrong with the code "char c; while((c = getchar()) != EOF) ..."? []

Why won't the code " while(!feof(infp)) { fgets(buf, MAXLINE, infp); fputs(buf, outfp); } '' work? []

My program's prompts and intermediate output don't always show up on the screen. []

Why does everyone say not to use gets()? []

What's the difference between fgetpos/fsetpos and ftell/fseek? []

Will fflush(stdin) flush unread characters from the standard input stream? []

I'm trying to update a file in place, by using fopen mode "r+", but it's not working. []

How can I redirect stdin or stdout from within a program? []

Once I've used freopen, how can I get the original stream back? []

How can I read a binary data file properly? []

Unix Programming FAQ How to manage multiple connections? []

How can I redirect stderr? []

How can I tell if input, output, or stderr has been redirected? []

Questions and Answers

stdio (3) - standard input/output library functions {oss}

fopen fdopen freopen (3) - stream open functions {oss}

funopen fropen fwopen (3) - open a stream {oss}

fclose (3) - close a stream {oss}

getdtablesize (3) - get descriptor table size {oss}

clearerr feof ferror fileno (3) - check and reset stream status {oss}

fflush fpurge (3) - flush a stream {oss}

setbuf setbuffer setlinebuf setvbuf (3) - stream buffering operations {oss}

fputc putc putchar putw (3) - output a character or word to a stream {oss}

fputs puts (3) - output a line to a stream {oss}

printf fprintf sprintf snprintf asprintf asnprintf vprintf vfprintf vsprintf vsnprintf vasprintf vansprintf (3) - formatted output conversion {oss}

fgetc getc getchar getw (3) - get next character or word from input stream {oss}

ungetc (3) - un-get character from input stream {oss}

fread fwrite (3) - binary stream input/output {oss}

scanf fscanf sscanf vscanf vsscanf vfscanf (3) - input format conversion {oss}

fgetln (3) - get a line from a stream {oss}

fgets gets (3) - get a line from a stream {oss}

fgetpos fseek fsetpos ftell rewind (3) - reposition a stream {oss}

ioctl (2) - control device {oss}

p5-File-Slurp-98.071901 - Perl5 module for single call read & write file routines

p5-File-Sync-0.09 - Perl5 module interface to the UNIX sync(2) and POSIX.1b fsync(2)

p5-File-Tools-2.0 - Perl5 module for several file operations: Copy, Recurse and Tools

p5-IO-stringy-2.108 - Perl5 module for using IO handles with non-file objects

sfio-1999 - The Safe/Fast I/O Library

Ntstream.H,Ntstream.Cpp - Share-aware C++ file streams {oss}

Pfopen.C - Open a file anywhere {oss}

Redirect.C - Redirect standard streams {oss}

Xfile.H, Xfile.C, Xtest.C - Martin Maney's fast line buffered file input {oss}

Getstrng.C - Safe gets() for input string of unknown length {oss}

Addhndls.C - Allow more than 20 open files under DOS 3+ {oss,msdos}

Favail.C - How many more files may be fopen'ed? {oss,msdos}

Files.C - Determine number of FILE set in CONFIG.SYS {oss,msdos}

Iscons.C - Does a FILE * refer to the console? {oss,msdos}

Isfopen.C - Is a FILE * in use? {oss,msdos}

Errfix.C - Redirect stderr to a file {oss}

Errfix.C - Redirect stderr to a file {oss,msdos}

Ioctl - This module gives your program an easy way of accessing the ioctl (input output control) constants. Only useful on Unix computers.

Libraries and Functions

(The following links to subjects at this site retain your personalized selections.)

See also Low level file and device operations - " Unbuffered " access of files and devices. (ioctl, fcntl, /dev, et al)

See also File Access - Operations affecting a file as a whole. (delete files, rename, truncate, etc.)

See also Directory Access - Accessing directories of files, browsing, management, et al.

File Access Limits - Limiting access to files (permissions, locking, et al)

Up to File System Access - Gateway topic to file system (files and directory) access and operations.