Hallo, Welt! oder auch "Hello World!" (engl.), ist ein bekanntes Beispielprogramm, das am Anfang fast jedes Programmierkurses vorkommt.
Das fertige Computerprogramm gibt lediglich den Text "Hello world!" (oder etwas ähnliches) auf dem Bildschirm aus. Dieses Programm soll dem angehenden Programmierer zeigen, was alles für ein vollständiges Programm (in der betreffenen Programmiersprache) benötigt wird, und einen ersten Einblick in die Syntax geben.
Line-oriented (aka Console)
with Ada.Text_Io; use Ada.Text_Io;
procedure Hallo is
begin
Put_Line ("Hallo, Welt!");
end Hallo;
MODEL SMALL IDEAL STACK 100H
DATASEG
HW DB 'Hallo, Welt!$'
CODESEG
MOV AX, @data
MOV DS, AX
MOV DX, OFFSET HW
MOV AH, 09H
INT 21H
MOV AX, 4C00H
INT 21H
END
BEGIN { print "Hallo, Welt!" }
Traditionelles, unstrukturiertes BASIC 10 PRINT "Hallo, Welt!" 20 END
Eher modernes, strukturiertes BASIC print "Hallo, Welt!"
GET "LIBHDR"
LET START () BE
$(
WRITES ("Hallo, Welt!*N")
$)
print("Hallo, Welt!");
#include <stdio.h>
int main(void) {
printf("Hallo, Welt!\n");
return 0;
}
#include <iostream>
int main() {
std::cout << "Hallo, Welt!\n";
}
class HalloWeltApp {
public static void Main() {
System.Console.WriteLine("Hallo, Welt!");
}
}
IDENTIFICATION DIVISION. PROGRAM-ID. HALLO-WELT.
ENVIRONMENT DIVISION.
DATA DIVISION.
PROCEDURE DIVISION. DISPLAY "Hallo, Welt!". STOP RUN.
(format t "Hallo Welt!~%")
class HALLO_WELT
creation
make
feature
make is
local
io:BASIC_IO
do
!!io
io.put_string("%N Hallo, Welt!")
end -- make
end -- class HALLO_WELT
-module(Hallo).
-export([Hallo_Welt/0]).
Hallo_Welt() -> io:fwrite("Hallo, Welt!\n").
." Hallo, Welt!" CR
PROGRAM HALLO
WRITE(*,10)
10 FORMAT('Hallo, Welt!')
STOP
END
"Hallo, Welt" print
ON ENTER {
"Hallo, " "Welt!" & SAY
}
public class Hallo {
public static void main(String[] args) {
System.out.println("Hallo, Welt!");
}
}
print "Hallo, Welt!"
TERM EQU 19 the MIX console device number
ORIG 1000 start address
START OUT MSG(TERM) output data at address MSG
HLT halt execution
MSG ALF "MIXAL"
ALF " HELL"
ALF "O WOR"
ALF "LD "
END START end of the program
MS-DOS batch
@echo off echo Hallo, Welt!
let main () =
print_endline "Hallo Welt!";;
PROC Hallo:
PRINT "Hallo, Welt"
ENDP
program Hallo;
begin
writeln('Hallo, Welt!');
end.
print "Hallo, Welt!\n";
<?php
print("Hallo, Welt!");
?>
#!/usr/local/bin/pike
int main() {
write("Hallo, Welt!\n");
return 0;
}
Test: procedure options(main);
declare My_String char(20) varying initialize('Hallo, Welt!');
put skip list(My_String);
end Test;
?- write("Hallo, Welt!"), nl.
print "Hallo, Welt!"
say "Hallo, Welt!"
print "Hallo, Welt!\n"
(display "Hallo, Welt!") (newline)
Benötigt mindestens eine Zeile als Eingabe:
sed -ne '1s/.*/Hallo, Welt!/p'
Transcript show: 'Hallo, Welt!'
print "Hallo, Welt!\n";
OUTPUT = "Hallo, Welt!" END
select "Hallo, Welt!" as message;
sub main print "Hallo, Welt" end sub
puts "Hallo, Welt!"
:Disp "Hallo, Welt!"
put "Hallo, Welt!"
echo 'Hallo, Welt!'
Graphical User Interfaces - as traditional applications
MsgBox "Hallo, Welt!"
PUBLIC SUB Form_Enter() PRINT "Hallo Welt" END
C++ bindings for GTK graphics toolkit
#include <iostream> #include <gtkmm/main.h> #include <gtkmm/button.h> #include <gtkmm/window.h> using namespace std;
class HalloWelt : public Gtk::Window {
public:
HalloWelt();
virtual ~HalloWelt();
protected:
Gtk::Button m_button;
virtual void on_button_clicked();
};
HalloWelt::HalloWelt()
: m_button("Hallo, Welt!") {
set_border_width(10);
m_button.signal_clicked().connect(SigC::slot(*this,
&HalloWelt::on_button_clicked));
add(m_button);
m_button.show();
}
HalloWelt::~HalloWelt() {}
void HalloWelt::on_button_clicked() {
cout << "Hallo, Welt!" << endl;
}
int main (int argc, char *argv[]) {
Gtk::Main kit(argc, argv);
HalloWelt HalloWelt;
Gtk::Main::run(HalloWelt);
return 0;
}
Windows API (in C)
#include <windows.h>
LRESULT CALLBACK WindowProcedure(HWND, UINT, WPARAM, LPARAM);
char szClassName[] = "MainWnd"; HINSTANCE hInstance;
int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
HWND hwnd;
MSG msg;
WNDCLASSEX wincl;
hInstance = hInst;
wincl.cbSize = sizeof(WNDCLASSEX);
wincl.cbClsExtra = 0;
wincl.cbWndExtra = 0;
wincl.style = 0;
wincl.hInstance = hInstance;
wincl.lpszClassName = szClassName;
wincl.lpszMenuName = NULL; //No menu
wincl.lpfnWndProc = WindowProcedure;
wincl.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1); //Color of the window
wincl.hIcon = LoadIcon(NULL, IDI_APPLICATION); //EXE icon
wincl.hIconSm = LoadIcon(NULL, IDI_APPLICATION); //Small program icon
wincl.hCursor = LoadCursor(NULL, IDC_ARROW); //Cursor
if (!RegisterClassEx(&wincl))
return 0;
hwnd = CreateWindowEx(0, //No extended window styles
szClassName, //Class name
"", //Window caption
WS_OVERLAPPEDWINDOW & ~WS_MAXIMIZEBOX,
CW_USEDEFAULT, CW_USEDEFAULT, //Let Windows decide the left and top positions of the window
120, 50, //Width and height of the window,
NULL, NULL, hInstance, NULL);
//Make the window visible on the screen
ShowWindow(hwnd, nCmdShow);
//Run the message loop
while (GetMessage(&msg, NULL, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return msg.wParam;
}
LRESULT CALLBACK WindowProcedure(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
PAINTSTRUCT ps;
HDC hdc;
switch (message)
{
case WM_PAINT:
hdc = BeginPaint(hwnd, &ps);
TextOut(hdc, 15, 3, "Hallo, Welt!", 13);
EndPaint(hwnd, &ps);
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hwnd, message, wParam, lParam);
}
return 0;
}
import java.awt.*; import java.awt.event.*;
public class HalloFrame extends Frame {
HalloFrame(String title) {
super(title);
}
public void paint(Graphics g) {
super.paint(g);
java.awt.Insets ins = this.getInsets();
g.drawString("Hallo, Welt!", ins.left + 25, ins.top + 25);
}
public static void main(String args [])
{
HalloFrame fr = new HalloFrame("Hallo");
fr.addWindowListener(
new WindowAdapter() {
public void windowClosing(WindowEvent e)
{
System.exit( 0 );
}
}
);
fr.setResizable(true);
fr.setSize(500, 100);
fr.setVisible(true);
}
}
Graphical User Interfaces - Webbrowser basiert
Java applets funktionieren in Verbindung mit HTML.
<HTML> <HEAD> <TITLE>Hallo Welt</TITLE> </HEAD> <BODY>
HalloWelt Program says:
<APPLET CODE="HalloWelt.class" WIDTH=600 HEIGHT=100> </APPLET>
</BODY> </HTML>
import java.applet.*; import java.awt.*;
public class HalloWelt extends Applet {
public void paint(Graphics g) {
g.drawString("Hallo, Welt!", 100, 50);
}
}
JavaScript, aka ECMAScript
JavaScript ist ein Skriptsprache, die insbesondere in HTML-Dateien verwendet wird. Der nachfolgende Kode kann in HTML-Quelltext eingebaut werden:
<script language="javascript">
function HalloWelt()
{
javascript: alert("Hallo, Welt!");
}
</script>
<a href="javascript:this.location()"
onclick="javascript:HalloWelt();">Hallo Welt Example</a>
An easier method uses JavaScript implicitly, calling the reserved alert function. Cut and paste the following line inside the <BODY> .... </BODY> HTML tags.
<a href="#" onclick="alert('Hallo, Welt!')">Hallo Welt Example</a>
An even easier method involves using popular browsers' support for the virtual 'javascript' protocol to execute JavaScript code. Enter the following as an Internet address (usually by pasting into the address box):
javascript:alert('Hallo, Welt!')
<window xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"> <box align="center"> <label value="Hallo, Welt!" /> </box> </window>
Exotische Programmiersprachen (auch esoterisch genannt)
30,14,16,101,16,108,16,32,16,111,16,108,1,12,16,72,16,108,16,111,16,87,16,114,16,100,16,33
See [1] for a Hallo, Welt program in 4DL.
![[1]](http://www.cliff.biffle.org/esoterica/4dl-Hallo.gif){kind=link}
\/>>>>>>\+\<<<\+!\>>\+\<<<<\-\<\-!\>>>\+\<<<\-!!+++!\/\-\/>>>>>\+\<<\+\<\+!---!\>>> \+\>\+\<<<\-\<<<\-!\>>>\-!\<<\+\<\+!\>\-\>\-!\>\-!\/\-/>>>>>\+\<<<<<\+!\/\-\/>>>\+\<<\+!
Note: this actually prints "HI" instead of "Hallo, Welt".
84 > 84 > 84 > 84 > 84 > 84 > 84 > 85
\/
85 < 86 < 86 < 86 < 86 < 86 < 0E < 66
\/ /\
84 > 84 > 0C > 8C > E5 > 0F 84 > 85
\/ /\ \/
85 < 86 < 86 < 3E < 0E 84 > 83 < 86
\/ /\ \/
84 > 84 > 84 > 84 > 84 > 0F 84 > 85
\/
00 < 00 < 00 < B6 < 0E < B6 < 0E < 86
Note: this actually prints "Hi" instead of "Hallo, Welt".
Baa, badassed areas!
Jarheads' arses
queasy nude adverbs!
Dare address abase adder? *bares baser dadas* HA!
Equalize, add bezique, bra emblaze.
He (quezal), aeons liable. Label lilac "bulla," ocean sauce!
Ends, addends,
duodena sounded amends.
"!dlrow olleH">v
,
^_@
main: "Hallo, Welt!\n">out :
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< +++++++++++++++.>.+++.------.--------.>+.>.
Ingredients. 72 g haricot beans 101 eggs 108 g lard 111 cups oil 32 zucchinis 119 ml water 114 g red salmon 100 g dijon mustard 33 potatoes
Method. Put potatoes into the mixing bowl. Put dijon mustard into the mixing bowl. Put lard into the mixing bowl. Put red salmon into the mixing bowl. Put oil into the mixing bowl. Put water into the mixing bowl. Put zucchinis into the mixing bowl. Put oil into the mixing bowl. Put lard into the mixing bowl. Put lard into the mixing bowl. Put eggs into the mixing bowl. Put haricot beans into the mixing bowl. Liquefy contents of the mixing bowl. Pour contents of the mixing bowl into the baking dish.
Serves 1.
AGb-A#A#+A+%A#DF-AC#
when a=0 then put "Hallo, Welt!" set a=1
Universe of bear hatchery says Hallo. Welt!.
It powers the marshy things;
the power of the snowmelt overrides.
H
PLEASE DO ,1 <- #13 DO ,1 SUB #1 <- #238 DO ,1 SUB #2 <- #112 DO ,1 SUB #3 <- #112 DO ,1 SUB #4 <- #0 DO ,1 SUB #5 <- #64 DO ,1 SUB #6 <- #238 DO ,1 SUB #7 <- #26
DO ,1 SUB #8 <- #248 DO ,1 SUB #9 <- #168 DO ,1 SUB #10 <- #24 DO ,1 SUB #11 <- #16 DO ,1 SUB #12 <- #158 DO ,1 SUB #13 <- #52 PLEASE READ OUT ,1 PLEASE GIVE UP
(=<`:9876Z4321UT.-Q+*)M'&%$H"!~}|Bzy?=|{z]KwZY44Eq0/{mlk**hKs_dG5
[m_BA{?-Y;;Vb'rR5431M}/.zHGwEDCBA@98\6543W10/.R,+O<
"HALLO, WELT.!" $$
#0<a>0:0#0>e>0:0#0>f>0>0:0#0^f>0:0#0+4>0:0#0#h>0:0#0^f>0:0#0<g>0:0#0>f >0:0#0<e>0:0#0?4>0:0#0^1>0:0#0>1>0:0^0
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d / ("Hallo, Welt!")
0 'd' 'l' 'r' 'o' 'w' ' ' ',' 'o' 'l' 'l' 'e' 'h' s 0 c 0 ret
Hallo Welt
forget
come from "Hallo" print "Hallo, " return
come from "Welt" print "Welt !" return
Please see [2] for a Hallo, Welt program in Piet.
![[2]](http://www.dangermouse.net/esoteric/Hallo.gif){kind=link}
Note that this is not a complete "Hallo, Welt!" program.
- - - ..- ...-.---.;newline - - - .-. - ..-.- ...-. ---.;! - - - ...- . . -.---.;d ----. . . -.---.;l ----. . -...---.;r ----. -...---.;o ----...-.- ..-. ---.;W
0a21646c726f77202c6f6c6c6548
, :::::::::::::::::::::::::::: ,
)
==============================
F
O F
c
=
sidefxio
void main
print 'H
print 'e
print 'l
print 'l
print 'o
print ',
print as char 32
print 'w
print 'o
print 'r
print 'l
print 'd
print '!
G GGG >++++++++++>!+++++++!++++++++++!+++!+##!!!!##-G+G G.+++++++++++++++##!!##.++!.+++..+++++++.+!.++! G G!.+++.------.--------.!+.!.G GG
[ `Hallo, _32 `Welt! _13 _10 ] \15 outs \0 halt
; Hallo, Welt in SMITH - version 2 (loop)
; R0 -> index into string (starts at R10)
; R2 -> -1
MOV R0, 10
MOV R2, 0
SUB R2, 1
MOV R[R0], "Hallo, Welt!"
MOV TTY, R[R0]
SUB R0, R2
MOV R1, R0
SUB R1, 23
NOT R1
NOT R1
MUL R1, 8
COR +1, -7, R1
:V+++++;:XVV;:v-----;:xvv;XXXXXXX++.<XXXXXXXXXX+.V ++..+++.<XXX++.>>XV.XX++++.+++.v-.x++.<XXX+++.<X.>
In the House You are inside the small blue house on Pine St. The floor is carpeted and the walls are paneled in a light coloured wood. The door is to the north. Julie is here.
>JULIE, Hallo, Welt! Julie doesn't respond.
>X JULIE Julie is a twentysomething woman with short brunette hair.
>QUIT
` ``si`k``s.H``s.e``s.l``s.l``s.o``s. ``s.w``s.o``s.r``s.l``s.d``s.!``sri ``si``si``si``si``si``si``si``si`ki
Note: actually prints "What do you want, universe?" in Klingon.
~ nuqneH { ~ 'u' ~ nuqneH disp disp } name
nuqneH
Functions:
|| No functions for this program !!
Stuff:
1/Hallo is chrs!
1/Sz, 1/Total are all cplx!
Text:
|| Initialize the data !!
Hallo < "Hallo, Welt!"!
Size Hallo > Sz!
Total < 0!
|| Take the string length and multiply by 100 !!
- Size - 0 Total > Total %10000!
|| Print and delete a character that many times !!
& WELT < FCHRS (Hallo)!
& Hallo < - Hallo FCHRS (Hallo)!
&& %Total!
|| Add a newline !!
WELT < nl!
:Endtext
1 print("Hallo Welt!");
Please see [3] for a Hallo, Welt program in Whitespace.
<print>Hallo Welt</print>
Textauszeichnungssprachen
Die folgenden Sprachen sind keine Programmiersprachen, sondern Textauszeichnungssprachen, also Sprachen, mit denen man einen im Computer gespeicherten Text für die Ausgabe auf dem Bildschirm oder mit dem Drucker formatieren kann. Analog zum "Hallo Welt!"-Programm ist ein "Hallo Welt!"-Dokument in einer dieser Sprachen ein Beispieldokument, das nur den Text "Hallo Welt" enhält.
Hallo, Welt!
oder in hexadezimaler Schreibweise:
48 61 6C 6C 6F 2C 20 57 65 6C 74 21
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<title>Hallo, Welt!</title>
<meta http-equiv="Content-type" content="text/html; charset=iso-8859-1">
</head>
<body>
<p>
Hallo, Welt!
</p>
</body>
</html>
/font /Courier findfont 24 scalefont font setfont 100 100 moveto (Hallo Welt!) show showpage
\font\HW=cmr10 scaled 3000
\leftline{\HW Hallo Welt}
\bye