Hello World
Hello World |
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subclasse de: demo program[*] |
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Commons: Hello World |
Un programma "Hello, world!" (anglese pro "Hallo, mundo!") frequentemente es utilisate pro facer un demonstration rapide de un linguage de programmation, per exemplo, in capitulos introductori de manuales e cursos. Iste typo de programma es multo simple, e solmente exhibi le message "Hello, world!" super le schermo del usator. Pro le majoritate de linguages, un programma "Hello World" es un del plus simple programmas possibile, ben que alcun exemplos es multo complexe, in particular illos que debe exhibir le message in un ambiente graphic (GUI).
Un programma "hello, world" pote esser un prova utile pro indicar que le compilator, ambiente de disveloppamento, e ambiente de tempore de execution (run-time) es installate correctemente. Quando on vole provar un nove collection de utensiles pro programmation, frequentemente il es melior provar con un programma simplissime (sed un que clarmente indica su successo).
Ben que parve programmas de prova ha existite ab le invention de computatores programmabile, le tradition de usar le phrase "Hello, world!" como le indication de successo esseva establite per un programma exemplari in le libro The C Programming Language ("le linguage de programmation C") per Brian Kernighan e Dennis Ritchie. Le programma exemplari de iste libro imprime "hello, world".
Un collection de programmas "hello, world" scribite in varie linguages de programmation pote servir como un "Petra de Rosetta" pro adjutar in apprender e comparar le linguages.
Ecce alcun exemplos de varie linguages:
Ambiente textual[modificar | modificar fonte]
Ada[modificar | modificar fonte]
with Ada.Text_Io; use Ada.Text_Io; procedure Hello is begin Put_Line ("Hello, world!"); end Hello;
linguage de montage (assembly) (UCP x86, MS-DOS, syntaxe TASM)[modificar | modificar fonte]
MODEL SMALL IDEAL STACK 100H
DATASEG HW DB 'Hello, world!$'
CODESEG MOV AX, @data MOV DS, AX MOV DX, OFFSET HW MOV AH, 09H INT 21H MOV AX, 4C00H INT 21H END
AWK[modificar | modificar fonte]
BEGIN { print "Hello, world!" }
BASIC[modificar | modificar fonte]
Traditional - BASIC non structurate 10 PRINT "Hello, world!" 20 END
Versiones plus moderne - BASIC structurate print "Hello, world!"
BCPL[modificar | modificar fonte]
GET "LIBHDR" LET START () BE $( WRITES ("Hello, world!*N") $)
C[modificar | modificar fonte]
#include <stdio.h> int main(void) { printf("Hello, world!\n"); return 0; }
C++[modificar | modificar fonte]
#include <iostream> int main() { std::cout << "Hello, world!" << std::endl; }
C#[modificar | modificar fonte]
class AppHalloMundo { public static void Main() { System.Console.WriteLine("Hello, world!"); } }
Clean[modificar | modificar fonte]
module hallo
Start :: String Start = "Hello, world"
COBOL[modificar | modificar fonte]
IDENTIFICATION DIVISION. PROGRAM-ID. HALLO-MUNDO.
ENVIRONMENT DIVISION.
DATA DIVISION.
PROCEDURE DIVISION. DISPLAY "Hello, world!". STOP RUN.
Common Lisp[modificar | modificar fonte]
(format t "Hello world!~%")
Eiffel[modificar | modificar fonte]
class HALLO_MUNDO
creation make feature make is local io:BASIC_IO do !!io io.put_string("%N Hello, world!") end -- make end -- class HALLO_MUNDO
Erlang[modificar | modificar fonte]
-module(hallo). -export([hallo_mundo/0]).
hallo_mundo() -> io:fwrite("Hello, world!\n").
Forth[modificar | modificar fonte]
." Hello, world!" CR
Fortran[modificar | modificar fonte]
PROGRAM HALLO WRITE(*,10) 10 FORMAT('Hello, world!') STOP END
Haskell[modificar | modificar fonte]
module HalloMundo (main) where
main = putStrLn "Hello World"
Iptscrae[modificar | modificar fonte]
ON ENTER { "Hello, " "World!" & SAY }
Java[modificar | modificar fonte]
public class Hello { public static void main(String[] args) { System.out.println("Hello, world!"); } }
Lua[modificar | modificar fonte]
print "Hello, world!"
MIXAL[modificar | modificar fonte]
TERM EQU 19 numero del "MIX console device" ORIG 1000 adresse initial START OUT MSG(TERM) expelle datos al adresse MSG HLT stoppa execution MSG ALF "MIXAL" ALF " HELL" ALF "O WOR" ALF "LD " END START fin del programma
Linguage de lot de MS-DOS[modificar | modificar fonte]
@echo off echo Hello, world!
OCaml[modificar | modificar fonte]
let _ = print_endline "Hello world!";;
OPL[modificar | modificar fonte]
PROC hallo: PRINT "Hello, World" ENDP
Pascal[modificar | modificar fonte]
program Hallo(output); begin writeln('Hello, world!') end.
Perl[modificar | modificar fonte]
print "Hello, world!\n";
PHP[modificar | modificar fonte]
<?php print("Hello, world!"); ?>
Pike[modificar | modificar fonte]
#!/usr/local/bin/pike int main() { write("Hello, world!\n"); return 0; }
PL/I[modificar | modificar fonte]
Prova: procedure options(main); declare Mi_Vector char(20) varying initialize('Hello, world!'); put skip list(Mi_Vector); end Prova;
Python[modificar | modificar fonte]
print "Hello, world!"
REXX[modificar | modificar fonte]
say "Hello, world!"
Ruby[modificar | modificar fonte]
print "Hello, world!\n"
SAKO[modificar | modificar fonte]
K) PROGRAM DRUKUJE NAPIS HELLO WORLD LINIA TEKST: HELLO WORLD KONIEC
Scheme[modificar | modificar fonte]
(display "Hello, world!") (newline)
sed (require al minus un linea de input (de stdin))[modificar | modificar fonte]
sed -ne '1s/.*/Hello, world!/p'
Seed7[modificar | modificar fonte]
$ include "seed7_05.s7i"; const proc: main is func begin writeln("Hello, world!"); end func;
Smalltalk[modificar | modificar fonte]
Transcript show: 'Hello, world!'
SML[modificar | modificar fonte]
print "Hello, world!\n";
SNOBOL[modificar | modificar fonte]
OUTPUT = "Hello, world!" END
SQL[modificar | modificar fonte]
create table HALLO (TEXTO char(15)); insert into HALLO (TEXTO) values ('Hello, world!'); select TEXTO from HALLO; drop table HALLO;
StarOffice Basic[modificar | modificar fonte]
sub main print "Hello, World" end sub
Tcl[modificar | modificar fonte]
puts "Hello, world!"
TI-BASIC[modificar | modificar fonte]
:Disp "Hello, world!"
Turing[modificar | modificar fonte]
put "Hello, world!"
UNIX-style shell[modificar | modificar fonte]
echo 'Hello, world!'
Pseudocodice in Interlingua[modificar | modificar fonte]
Algorithmo Hallo es: sia s:="Hello, world"; imprime s; fin-Hallo
Ambiente graphic — como applicationes traditional[modificar | modificar fonte]
Visual Basic[modificar | modificar fonte]
MsgBox "Hello, world!"
C++ 'bindings' pro GTK toolkit de infographia[modificar | modificar fonte]
#include <iostream> #include <gtkmm/main.h> #include <gtkmm/button.h> #include <gtkmm/window.h> using namespace std;
class HalloMundo : public Gtk::Window { public: HalloMundo(); virtual ~HalloMundo(); protected: Gtk::Button m_button; virtual void on_button_clicked(); };
HalloMundo::HalloMundo() : m_button("Hello, world!") { set_border_width(10); m_button.signal_clicked().connect(SigC::slot(*this, &HalloMundo::on_button_clicked)); add(m_button); m_button.show(); }
HalloMundo::~HalloMundo() {}
void HalloMundo::on_button_clicked() { cout << "Hello, world!" << endl; }
int main (int argc, char *argv[]) { Gtk::Main kit(argc, argv); HalloMundo halloamico; Gtk::Main::run(halloamico); return 0; }
Qt toolkit (in C++)[modificar | modificar fonte]
#include <qapplication.h> #include <qpushbutton.h> #include <qwidget.h> #include <iostream>
class HalloMundo : public QWidget { Q_OBJECT
public: HalloMundo(); virtual ~HalloMundo(); public slots: void handleButtonClicked(); QPushButton *mPushButton; };
HalloMundo::HalloMundo() : QWidget(), mPushButton(new QPushButton("Hello, World!", this)) { connect(mPushButton, SIGNAL(clicked()), this, SLOT(handleButtonClicked())); }
HalloMundo::~HalloMundo() {}
void HalloMundo::handleButtonClicked() { std::cout << "Hello, World!" << std::endl; }
int main(int argc, char *argv[]) { QApplication app(argc, argv); HalloMundo halloAmico; app.setMainWidget(&halloAmico); halloAmico.show(); return app.exec(); }
Windows API (in C)[modificar | modificar fonte]
(iste codice es in anglese) :-)
#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, "Hello, world!", 13); EndPaint(hwnd, &ps); break; case WM_DESTROY: PostQuitMessage(0); break; default: return DefWindowProc(hwnd, message, wParam, lParam); } return 0; }
Java[modificar | modificar fonte]
import java.awt.*; import java.awt.event.*;
public class QuadroDeSalutation extends Frame { QuadroDeSalutation(String titulo) { super(titulo); } public void paint(Graphics g) { super.paint(g); java.awt.Insets ins = this.getInsets(); g.drawString("Hello, world!", ins.left + 25, ins.top + 25); } public static void main(String args []) { QuadroDeSalutation qua = new QuadroDeSalutation("Hello");
qua.addWindowListener( new WindowAdapter() { public void windowClosing(WindowEvent e) { System.exit( 0 ); } } ); qua.setResizable(true); qua.setSize(500, 100); qua.setVisible(true); } }
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applet Java[modificar | modificar fonte]
- Le applets Java es appellate de archivos HTML.
<html> <head> <title>Hallo Mundo</title> </head> <body>
Mi programma "hello world" dice:
<applet code="HalloMundo.class" width="600" height="100"> </applet> </body> </html>
import java.applet.*; import java.awt.*;
public class HalloMundo extends Applet { public void paint(Graphics g) { g.drawString("Hello, world!", 100, 50); } }
JavaScript (o ECMAScript)[modificar | modificar fonte]
- JavaScript (o ECMAScript) es un linguage de programmation de scripts incastrate in files HTML. Pro probar iste programma simplemente pone le codice sequente intra le elemento <head> de qualcunque file HTML.
<script language="javascript"> function halloMundo() { alert("Hello, world!"); } </script>
<a href="javascript:this.location()" onclick="javascript:halloMundo();">Programma "hello world"</a>
- Un methodo plus facile usa le JavaScript in un maniera implicite, e appella le function reservate alert. Copia e colla le sequente codice intro le elemento <body> de un file HTML.
<a href="#" onclick="alert('Hello, world!')">Programma "hello world"</a>
- Un methodo ja plus facile usa le protocollo virtual 'javascript' (supportate per le majoritate de navigatores popular) pro executar le codice. Simplemente pone le linea sequente a in le campo de adresse de vostre navigator:
javascript:alert('Hello, world!')
XUL[modificar | modificar fonte]
<window xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"> <box align="center"> <label value="Hello, world!" /> </box> </window>
Formatos de documentos[modificar | modificar fonte]
ASCII[modificar | modificar fonte]
- Le serie sequente de characteres (exprimite ci in notation hexadecimal):
48 65 6C 6C 6F 2C 20 77 6F 72 6C 64 21 0D 0A
HTML[modificar | modificar fonte]
<html> <head> <title>Hallo, Mundo!</title> </head> <body> <p>Hello, world!</p> </body> </html>
PostScript[modificar | modificar fonte]
/font /Courier findfont 24 scalefont font setfont 100 100 moveto (Hello world!) show showpage
TeX[modificar | modificar fonte]
\font\HW=cmr10 scaled 3000 \leftline{\HW Hello world} \bye
Ligamines externe[modificar | modificar fonte]
- http://www.latech.edu/~acm/HelloWorld.shtml — ACM Projecto "Hello World" (in anglese)
- http://www.cuillin.demon.co.uk/nazz/trivia/hw/hello_world.html — Un collection de programmas "Hello World" (in anglese)
- http://99-bottles-of-beer.ls-la.net/ — Un programma plus complexe in multissime linguages (in anglese)