Comparison of Programming Languages (basic Instructions) - Standard Stream I/O

Standard Stream I/O

read from write to
stdin stdout stderr
ALGOL 68 readf(($format$, x)); or
getf(stand in, ($format$, x));
printf(($format$, x)); or
putf(stand out, ($format$, x));
putf(stand error, ($format$, x));
C (C99) scanf(format, &x); or
fscanf(stdin, format, &x);
printf( format, x); or
fprintf(stdout, format, x);
fprintf(stderr, format, x );
Objective-C data = readDataToEndOfFile]; writeData:data]; writeData:data];
C++ «std::»cin >> x; or
«std::»getline(«std::»cin, str);
«std::»cout << x; «std::»cerr << x; or
«std::»clog << x;
C# x = Console.Read; or
x = Console.ReadLine;
Console.Write(«format, »x); or
Console.WriteLine(«format, »x);
Console.Error.Write(«format, »x); or
Console.Error.WriteLine(«format, »x);
D x = std.stdio.readln std.stdio.write(x) or
std.stdio.writeln(x) or
std.stdio.writef(format, x) or
std.stdio.writefln(format, x)
stderr.write(x) or
stderr.writeln(x) or
std.stdio.writef(stderr, format, x) or
std.stdio.writefln(stderr, format, x)
Java x = System.in.read; or
x = new Scanner(System.in).nextInt; or
x = new Scanner(System.in).nextLine;
System.out.print(x); or
System.out.printf(format, x); or
System.out.println(x);
System.err.print(x); or
System.err.printf(format, x); or
System.err.println(x);
Go fmt.Scan(&x) or
fmt.Scanf(format, &x) or
x = bufio.NewReader(os.Stdin).ReadString('\n')
fmt.Println(x) or
fmt.Printf(format, x)
fmt.Fprintln(os.Stderr, x) or
fmt.Fprintf(os.Stderr, format, x)
JavaScript
document.write(x)
JavaScript
Response.Write(x)
JavaScript
x = WScript.StdIn.Read(chars) or
x = WScript.StdIn.ReadLine
WScript.Echo(x) or
WScript.StdOut.Write(x) or
WScript.StdOut.WriteLine(x)
WScript.StdErr.Write(x) or
WScript.StdErr.WriteLine(x)
Common Lisp (setf x (read-line)) (princ x) or
(format t format x)
(princ x *error-output*) or
(format *error-output* format x)
Scheme (R6RS) (define x (read-line)) (display x) or
(format #t format x)
(display x (current-error-port)) or
(format (current-error-port) format x)
ISLISP (setf x (read-line)) (format (standard-output) format x) (format (error-output) format x)
Pascal read(x); or
readln(x);
write(x); or
writeln(x);
Visual Basic Input« prompt,» x Print x or
? x
Visual Basic .NET x = Console.Read or
x = Console.ReadLine
Console.Write(«format, »x) or
Console.WriteLine(«format, »x)
Console.Error.Write(«format, »x) or
Console.Error.WriteLine(«format, »x)
Python 2.x x = raw_input(«prompt») print x or
sys.stdout.write(x)
print >> sys.stderr, x or
sys.stderr.write(x)
Python 3.x x = input(«prompt») print(, end=""») print(, end=""», file=sys.stderr)
S-Lang fgets (&x, stdin) fputs (x, stdout) fputs (x, stderr)
Fortran READ(*,format) variable names or
READ(INPUT_UNIT,
format) variable names
WRITE(*,format) expressions or
WRITE(OUTPUT_UNIT,
format) expressions
WRITE(ERROR_UNIT,format) expressions
Forth buffer length ACCEPT ( # chars read )
KEY ( char )
buffer length TYPE
char EMIT
PHP $x = fgets(STDIN); or
$x = fscanf(STDIN, format);
print x; or
echo x; or
printf(format, x);
fprintf(STDERR, format, x);
Perl $x = <>; or
$x = ;
print x; or
printf format, x;
print STDERR x; or
printf STDERR format, x;
Perl 6 $x = $*IN.get; x.print or
x.say
x.note or
$*ERR.print(x) or
$*ERR.say(x)
Ruby x = gets puts x or
printf(format, x)
$stderr.puts(x) or
$stderr.printf(format, x)
Windows PowerShell $x = Read-Host«« -Prompt» text»; or
$x = ::Read; or
$x = ::ReadLine
x; or
Write-Output x; or
echo x
Write-Error x
OCaml let x = read_int or
let str = read_line or
Scanf.scanf format (fun x ... -> ...)
print_int x or
print_endline str or
Printf.printf format x ...
prerr_int x or
prerr_endline str or
Printf.eprintf format x ...
F# let x = System.Console.ReadLine printf format x ... or
printfn format x ...
eprintf format x ... or
eprintfn format x ...
Standard ML val str = TextIO.inputLIne TextIO.stdIn print str TextIO.output (TextIO.stdErr, str)
Haskell (GHC) x <- readLn or
str <- getLine
print x or
putStrLn str
hPrint stderr x or
hPutStrLn stderr str


^a Algol 68 additionally as the "unformatted" transput routines: read, write, get and put.
^b gets(x) and fgets(x, length, stdin) read unformatted text from stdin. Use of gets is not recommended.
^c puts(x) and fputs(x, stdout) write unformatted text to stdout.
^d fputs(x, stderr) writes unformatted text to stderr
^e INPUT_UNIT, OUTPUT_UNIT, ERROR_UNIT are defined in the ISO_FORTRAN_ENV module.

Read more about this topic:  Comparison Of Programming Languages (basic Instructions)

Famous quotes containing the words standard and/or stream:

    I don’t have any problem with a reporter or a news person who says the President is uninformed on this issue or that issue. I don’t think any of us would challenge that. I do have a problem with the singular focus on this, as if that’s the only standard by which we ought to judge a president. What we learned in the last administration was how little having an encyclopedic grasp of all the facts has to do with governing.
    David R. Gergen (b. 1942)

    This land is your land, this land is my land, From California to the New York Island. From the redwood forest to the Gulf Stream waters This land was made for you and me.
    Woody Guthrie (1912–1967)