“Hello, World!”程序是一个只在计算机屏幕上打印出“Hello, World!”(英语,意为“世界,你好!”)字串的计算机程序。该程序通常是计算机程序设计语言的初学者所要学习编写的第一个程序。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已经正确安装。 wL[{6wL
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将Hello World程序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》。 2]cU:j6G
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以下是用不同语言写成的Hello World程序的几个例子: b}!T!IP}
Ada PO*0jO;%
with Ada.Text_Io; use Ada.Text_Io; " TC:O^X
procedure Hello is 88Vl1d&b
begin /YHnt-}v,
Put_Line ("Hello, world!"); q9(Z9$a(\
end Hello; BHt9$$Z|
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汇编语言 g}$B4_sY
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x86 CPU,DOS,TASM 4 {+47=n
MODEL SMALL x:+]^?}r
IDEAL (}
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STACK 100H BG/RNem
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DATASEG u1`JvfLrL
HW DB 'Hello, world!$' ,L\>mGw
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CODESEG |!L0X@>
MOV AX, @data o]<J&<WM
MOV DS, AX Dlg9PyQ
MOV DX, OFFSET HW +S@[1 N
MOV AH, 09H BBa!le9P
INT 21H YL/B7^fd8
MOV AX, 4C00H Hb\['VhzM
INT 21H b1EY6'R2
END A`*Sx"~jdx
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x86 CPU,GNU/Linux,NASM |%@pjJ`3
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). P52qt N<
;Enter this into "hello.asm" then type: #9t3 <H[
;"nasm -f elf hello.asm" FiKGB\_]
;"ld hello.o -o hello" |Q$Dj!!1P
;"./hello" ?u>A2Vc!
%*OQH?pyx}
section .data ;data section declaration 0zE(:K
msg db 'Hello World!',0AH Iz8gZ:rd0
len equ $-msg ;string length 2E0oLl[
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section .text ;code section declaration 3x)jab
global _start ;entry point (start of execution) krRnE7\m
_start: mov edx,len ;string length , 8o
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mov ecx,msg ;string start IU\h,Ug
mov ebx,1 ;file handle: stdout 5%w08
mov eax,4 ;sys_write \S>GtlQbn
int 80h ;kernel system call d$y?py
{?Cm
mov ebx,0 ;return value MP~+@0cv
mov eax,1 ;sys_exit I "HEXsSe
int 80h ;kernel system call /%TL{k&m$
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x86 CPU,Windows,MASM32 6t3Zi:=I
.386 q-qz-cR
.model flat,stdcall EP{/]T
option casemap:none (#nB90E{*
;Include 文件定义 `!<#'PR
include windows.inc nZ[`Yrq)0
include user32.inc 4xgfm.9I^
includelib user32.lib vw
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include kernel32.inc !ezy
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includelib kernel32.lib Ks-$([_F
;数据段 n$<n
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.data 6foiN W+
szCaption db 'A MessageBox!',0 {Gw{W&<
szText db 'Hello,world!',0 t(UdV
;代码段 04:QEC"9mj
.code uG(XbDZZ1W
start: EPU3Jban
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK [0lO0ik>G
invoke ExitProcess,NULL .:=5|0m
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> rN'}IS@5
end start \{={{O
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AWK l_pf9!z
BEGIN { print "Hello, world!" } Z9j`<VgN
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BASIC f |NXibmP
传统版BASIC(例如GWBASIC): ,,G'Zur7
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10 PRINT "Hello, world!" r ?z}TtDp
20 END S7b7zJ8A
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或在提示符输入: `Dp4Z>|
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?"Hello, world!":END R#!Urhh
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现代版BASIC(例如Quick BASIC): 7V&ly{</
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Print "Hello, world!" De<i
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以下的语句在Quick BASIC中同样有效: Kf`/ Gc!
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? "Hello,world!" 3e1%G#fu
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GET "LIBHDR" ~|{_Go{
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LET START () BE fJ+4H4K
$( I>lblI$7
WRITES ("Hello, world!*N") 37*2/N2
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Befunge 2\CZ"a#[
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++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< (O/W`qo
+++++++++++++++.>.+++.------.--------.>+.>. oSl}A,aQ(
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C !ZY1AhGZ
#include <stdio.h> @]L$eOV_
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int main(void) Eo@rrM:
{ t-Ble
printf("Hello, world!\n"); o1H6E1$=
return 0; B/B`=%~5_^
} &_' evZ8
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C++ F(w<YU%6
#include <iostream> CKX3t:HP0
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int main() 1*:BOoYx
{ SVPksr
std::cout << "Hello, world!" << std::endl; 7wHd*{^9N
return 0; P`y.3aK
} (]-RL
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C++/CLI 4wx{i6
int main() NKRm#
{ Ct$\!|aR
System::Console::WriteLine("Hello, world!"); 2#Qw
} W+Ou%uv}S
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C# (C Sharp) u ^M'[<{
class HelloWorldApp 7gREcL2
{ @B!gxW\C
public static void Main() >^g\s]c[
{ .-1'#Z1T
System.Console.WriteLine("Hello, world!"); 4}0Ry\
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} %0vWyU:K9
} ~SI G0U8
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COBOL +kq+x6&
IDENTIFICATION DIVISION. fFXnD
PROGRAM-ID. HELLO-WORLD.
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ENVIRONMENT DIVISION. &td
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DATA DIVISION. VdGpreRPC
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PROCEDURE DIVISION. l!:L<B
DISPLAY "Hello, world!". 6cOlY=
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STOP RUN. ADA}_|O
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Common Lisp Ged} qXn
(format t "Hello world!~%") 4r#4h4`y|
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DOS批处理 PoLk{{l3
@echo off bnH:|-?q
echo "Hello, world!" sAnb
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Eiffel A.(e=;0bu
class HELLO_WORLD [MF&x9Ss?%
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creation FJBB@<>:
make Cv;#8Wj}
feature yTf/]H]d
make is z&\N^tBv
local T/:6Z
io:BASIC_IO NHe[,nIV
do -]G=Q1 1
!!io gw$?&[wY
io.put_string("%N Hello, world!") eV"Uv3
end -- make \uZ1Sl
end -- class HELLO_WORLD fr}.#~{5Y
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Erlang `rV-,-r@
-module(hello). 3E}j*lo
-export([hello_world/0]). U|8?$/*\
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hello_world() -> io:fwrite("Hello, World!\n"). 7Dw.9EQ
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Forth j|{
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." Hello, world!" CR Qx&7Ceu"
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Fortran *;Za))
WRITE(*,10) uUe#+[bD
10 FORMAT('Hello, World!') Ao@WTs9
STOP _|#P~Ft
END m= %KaRI
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HTML a6?t?:~|
<HTML> { T<[-"h
<HEAD> V(Cxd.u
<TITLE> Hello World! </TITLE> X]dN1/_
</HEAD> EAE#AB-A
<BODY> yoz-BS
<p>Hello World!</p> xmtD0U1
</BODY> "G Jhx/zt
</HTML> ! 6R|
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INTERCAL Jgy6 !qUn_
PLEASE DO ,1 <- #13 B] Koi1B
DO ,1 SUB #1 <- #238 %.8(R
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DO ,1 SUB #2 <- #112 t| B<F t^
DO ,1 SUB #3 <- #112 "V5_B^Gzb]
DO ,1 SUB #4 <- #0 V7vojm4O
DO ,1 SUB #5 <- #64 ]#7baZ
DO ,1 SUB #6 <- #238 99n;%W>
DO ,1 SUB #7 <- #26 M0hR]4T
DO ,1 SUB #8 <- #248 g!i45]6[Nw
DO ,1 SUB #9 <- #168 Z%
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DO ,1 SUB #10 <- #24 w^:@g~
DO ,1 SUB #11 <- #16 }H/94]~tH
DO ,1 SUB #12 <- #158 e0IGx]5i
DO ,1 SUB #13 <- #52 QBA{*@ A-
PLEASE READ OUT ,1 Z{2QDjAI;
PLEASE GIVE UP ,+x\NY2d
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Java 3wQ\L=
public class Hello ;CuL1N#I
{ G]dHYxG
public static void main(String[] args) e~nh95
{ I<"UQ\)
System.out.println("Hello, world!"); iZ0(a
} :Ye~I;"8
} %D7 '7E8.
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4-9cp=\PE
JSP "&\(:#L
<% d
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out.print("Hello, world!"); BWr!K5w>i
%> 4$4Tx9C
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fT=ZiHJ3Gu
MIXAL I/gfsyfA
TERM EQU 19 the MIX console device number 7,Q7`}gBf
ORIG 1000 start address |aj]]l[@S
START OUT MSG(TERM) output data at address MSG MfA%Xep
HLT halt execution 1yeD-M"w
MSG ALF "MIXAL" Djf~8q V!
ALF " HELL" bNoZ{ 7
ALF "O WOR" w)h"?'m~
ALF "LD " QwuSo{G
END START end of the program Ko
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<..直接输出..> k1LbWR1%wB
Hello, world! hJX;/~L
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<..或者..> 9gZS)MZ
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// 不带换行 <!X]$kvG
? "Hello, world!" V3axwg_
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// 或者 S Z &[o&H
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// 带换行 ]agdVr^
?? 'Hello, world!' k;.<DN
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OCaml clr]gib
let main () = YLV$#a3
print_endline "Hello world!";; D~TK'&