Hello World
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"Hello, World!" 程序是一个在计算机屏幕上，只印出 "Hello, World!"（意为「世界，你好！」）這一行字串的计算机程序。像這樣簡單的程序，通常是计算机程序设计语言的初学者，在学习编写時的第一个程序。它还可以用来确定该语言的编译器、程序开发环境，以及运行环境是否已经安装妥當。 把印出 "Hello World" 作为第一个学写的程序，现在已经成为一种传统。该程序最早出现在由 Brian Kernighan 和 Dennis Ritchie 写的计算机程序设计教程《C语言程序设计》（The C Programming Language）。 以下是用不同语言写成的 Hello World 程序的几个例子： [编辑] 打印到终端[编辑] ActionScript<source lang="actionscript"> trace("Hello, world!"); </source> [编辑] Ada<source lang="ada"> with TEXT_IO; procedure HELLO is begin
TEXT_IO.PUT_LINE ("Hello, world!");
end HELLO; </source> [编辑] 汇编语言[编辑] x86 CPU，GNU/Linux，NASM<source lang="asm">
section .data
msg db 'Hello, world!',0xA
len equ $-msg
section .text
global _start
_start:
mov edx,len
mov ecx,msg
mov ebx,1
mov eax,4
int 0x80
mov ebx,0
mov eax,1
int 0x80
</source> [编辑] x86 CPU、Windows、MASM32<source lang="ASM"> .386
.model flat,stdcall
option casemap:none
include windows.inc include user32.inc includelib user32.lib include kernel32.inc includelib kernel32.lib
.data
szCaption db "A MessageBox!", 0 szText db "Hello, world!", 0
.code
start: invoke MessageBox, NULL, addr szText, addr szCaption, MB_OK invoke ExitProcess, NULL
end start </source> [编辑] ASP<source lang="asp"><% Response.Write("Hello, world!") %></source>
<source lang="asp"> <% strHelloWorld = "Hello, world!" %> <%= strHelloWorld %> </source>
<source lang="asp"><%= "Hello, world!" %></source> [编辑] AutoIt<source lang="autoit">MsgBox(1,,'Hello, world!')</source> [编辑] AWK<source lang="text"> BEGIN { print "Hello, world!" } </source> [编辑] Bash (or sh)<source lang="bash"> echo 'Hello, world!'</source> 或者： <source lang="bash"> printf 'Hello, world!\n'</source> [编辑] BASIC传统版 BASIC（例如 GWBASIC）： <source lang="qbasic"> 10 PRINT "Hello, world!" 20 END </source> 或在提示符輸入： <source lang="qbasic"> ? "Hello, world!" </source> 现代版 BASIC（例如 Quick BASIC）： <source lang="qbasic"> Print "Hello, world!" </source> 以下的语句, 在 Quick BASIC 中同样有效： <source lang="qbasic"> ? "Hello,world!" </source> [编辑] BCPL<source lang="text"> GET "LIBHDR" LET START () BE $(
WRITES ("Hello, world!*N")
$) </source> [编辑] Befunge<source lang="text"> "!dlrow olleH">v
,
^_@
</source> [编辑] Brainfuck<source lang="text"> ++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< +++++++++++++++.>.+++.------.--------.>+.>. </source> [编辑] BlitzBasic<source lang=BlitzBasic > Print "Hello, world!" WaitKey </source> [编辑] C<source lang="c">
int main(int argc, char* argv[]) {
printf("Hello, world!\n");
return 0;
} </source> 或者： <source lang=c>
int main(void) {puts("Hello, world!");} </source> [编辑] C++<source lang="cpp">
int main() { std::cout << "Hello, world!" << std::endl; return 0; } </source> 或者： <source lang="cpp">
using namespace std; int main() { cout << "Hello, world!" << endl; return 0; } </source> [编辑] C++/CLI<source lang="cpp"> int main() {
System::Console::WriteLine("Hello, world!");
} </source> [编辑] C# (C Sharp)<source lang="csharp"> class HelloWorldApp {
static void Main()
{
System.Console.WriteLine("Hello, world!");
}
} </source> 或者（僅用於Microsoft Windows） <source lang="csharp"> class HelloWorldApp {
[DllImport("user32.dll")]
static extern MessageBox(string title, string message);
public static void Main()
{
MessageBox(null, "Hello, world!");
}
} </source> 或者（使用附加的Windows Forms） <source lang="csharp"> using System.Windows.Forms; class HelloWorldApp {
public static void Main()
{
MessageBox.Show("Hello, world!");
}
} </source> [编辑] COBOL<source lang="text"> IDENTIFICATION DIVISION. PROGRAM-ID. HELLO-WORLD. ENVIRONMENT DIVISION. DATA DIVISION. PROCEDURE DIVISION. DISPLAY "Hello, world!". STOP RUN. </source> [编辑] Common Lisp<source lang="lisp"> (format t "Hello world!~%") </source> [编辑] DOS批处理<source lang="dos"> @echo Hello, world! </source> 對於MS-DOS 3.0或更低版本： <source lang="dos"> echo off cls echo Hello, world! </source> [编辑] Eiffel<source lang="eiffel"> class HELLO_WORLD creation make feature
make is
local
io:BASIC_IO
do
!!io
io.put_string("%N Hello, world!")
end -- make
end -- class HELLO_WORLD </source> [编辑] Erlang<source lang="text"> -module(hello). -export([hello_world/0]).
hello_world() -> io:fwrite("Hello, World!\n").
</source> [编辑] Forth<source lang="text"> ." Hello, world!" CR </source> [编辑] Fortran<source lang="fortran"> WRITE(*,10) 10 FORMAT('Hello, World!') STOP END </source> [编辑] HTML<source lang="html4strict"> <html> <head> <title> Hello World! </title> </head> <body> Hello World! </body> </html> </source> [编辑] HQ9+<source lang=text> H </source> [编辑] INTERCAL<source lang="text"> 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 </source> [编辑] Java<source lang="java"> public class Hello {
public static void main(String[] args)
{
System.out.println("Hello, world!");
}
} </source> [编辑] JSP<source lang="java"> <%
out.print("Hello, world!");
%> </source> [编辑] Lua<source lang="lua"> print "Hello, world!" </source> [编辑] MIXAL<source lang="text"> 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
</source> [编辑] Nuva<source lang="text"> <..直接输出..> Hello, world! <..或者..> <. // 不带换行 ? "Hello, world!" // 或者 // 带换行 ?? 'Hello, world!' .> </source> [编辑] OCaml<source lang="ocaml"> let main () = print_endline "Hello world!";; </source> [编辑] Pascal<source lang="pascal"> program Hello; begin
writeln('Hello, world!');
end. </source> [编辑] Perl<source lang="perl">
print "Hello, world!\n"; </source> [编辑] PHP<source lang="php"> <?php echo 'Hello, world!';//通常使用這個, 比 print 少一個字元 print 'Hello, world!'; ?> </source> [编辑] Pike<source lang="text">
int main() {
write("Hello, world!\n");
return 0;
} </source> [编辑] PL/I<source lang="text"> Test: procedure options(main);
declare My_String char(20) varying initialize('Hello, world!');
put skip list(My_String);
end Test; </source> [编辑] Prolog<source lang="text"> goal
write("hello,world!").
</source> [编辑] Python<source lang="python">
print "Hello, world!" </source> [编辑] REXX<source lang="text"> say "Hello, world!" </source> [编辑] Ruby<source lang="ruby">
print "Hello, world!\n" </source> [编辑] Scheme<source lang="scheme"> (display "Hello, world!") (newline) </source> [编辑] sed（需要至少一行输入） <source lang="text"> sed -ne '1s/.*/Hello, world!/p' </source> [编辑] Seed7<source lang="text"> $ include "seed7_05.s7i";
const proc: main is func
begin
writeln("Hello, world!");
end func;
</source> [编辑] Smalltalk<source lang="smalltalk"> Transcript show: 'Hello, world!' </source> [编辑] SNOBOL<source lang="text"> OUTPUT = "Hello, world!" END </source> [编辑] SQL<source lang="sql"> create table MESSAGE (TEXT char(15)); insert into MESSAGE (TEXT) values ('Hello, world!'); select TEXT from MESSAGE; drop table MESSAGE; </source> [编辑] Tcl<source lang="tcl">
puts "Hello, world!" </source> [编辑] TScript<source lang="text"> ? "Hello, world!" </source> [编辑] Turing<source lang="text"> put "Hello, world!" </source> [编辑] UNIX-style shell程序中的/bin/sh可改为您使用的shell <source lang="bash">
echo 'Hello, world!' </source> [编辑] GUI[编辑] Delphi<source lang="delphi"> program HelloWorld; uses Dialogs; begin
ShowMessage('Hello, World!');
end. </source> [编辑] Nuva<source lang="text"> <.
System.Ui.ShowMessage('Nuva', 'Hello, world!', ['OK'])
.> </source> [编辑] Visual Basic<source lang=vb> MsgBox "Hello, world!" '或者 Print "Hello, world!" </source> [编辑] Visual FoxPro<source lang="visualfoxpro"> ? "Hello, world!" </source> [编辑] X11用一个程序 <source lang="text"> xmessage 'Hello, world!' </source> 用C++和gtkmm 2 <source lang=cpp>
using namespace std; class HelloWorld : public Gtk::Window { public: HelloWorld(); virtual ~HelloWorld(); protected: Gtk::Button m_button; virtual void on_button_clicked(); }; HelloWorld::HelloWorld() : m_button("Hello, world!") { set_border_width(10); m_button.signal_clicked().connect(SigC::slot(*this, &HelloWorld::on_button_clicked)); add(m_button); m_button.show(); } HelloWorld::~HelloWorld() {} void HelloWorld::on_button_clicked() { cout << "Hello, world!" << endl; } int main (int argc, char *argv[]) { Gtk::Main kit(argc, argv); HelloWorld helloworld; Gtk::Main::run(helloworld); } </source> [编辑] Java<source lang="java"> import java.awt.*; import java.awt.event.*; public class HelloFrame extends Frame {
HelloFrame(String title)
{
super(title);
}
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 [])
{
HelloFrame fr = new HelloFrame("Hello");
fr.addWindowListener(
new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
System.exit( 0 );
}
}
);
fr.setResizable(true);
fr.setSize(500, 100);
fr.setVisible(true);
}
} </source> [编辑] Java AppletJava Applet用于HTML文件。 HTML代码: <source lang="html4strict"> <html> <head> <title>Hello World</title> </head> <body> HelloWorld Program says: <applet code="HelloWorld.class" width="600" height="100"> </applet> </body> </html> </source> Java代码: <source lang=java> import java.applet.*; import java.awt.*; public class HelloWorld extends Applet {
public void paint(Graphics g)
{
g.drawString("Hello, world!", 100, 50);
}
} </source> [编辑] JavaScriptJavaScript是一种用于HTML文件的脚本语言。要查看以下程序的运行结果，只要将其复制到任何HTML文本即可。 <source lang="html4strict"> <script language="javascript"> function helloWorld() {
alert("Hello World");
} </script> <a href="javascript:this.location()" onclick="javascript:helloWorld();">Hello World Example</a> </source> [编辑] PostScriptPostScript是一种专门用来创建图像的语言，常用于打印机。 <source lang=text> /font /Courier findfont 24 scalefont font setfont 100 100 moveto (Hello World!) show showpage </source> [编辑] XAML<source lang=xml> <Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" x:Class="XAMLSample.Page1" > <Button Click="HelloWorld" Name="Button1">Click Here</Button> </Page> </source> <source lang=csharp>
using System;
using System.Windows;
using System.Windows.Controls;
namespace XAMLSample
{
public partial class Page1 : Page
{
void HelloWorld(object sender, RoutedEventArgs e)
{
MessageBox.Show("Hello, world!");
}
}
}
</source> [编辑] 外部链接 |
