“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。 |A19IXZ\
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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》。 Xrd-/('2
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以下是用不同语言写成的Hello World程序的几个例子: P'D'+qS
Ada %~^:[@xa*
with Ada.Text_Io; use Ada.Text_Io; :`20i*
procedure Hello is BF+i82$zo
begin 8c0ugM
Put_Line ("Hello, world!"); -<M'h
end Hello; >19j_[n@VC
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l6k.`1.In
汇编语言 } {<L<
`*HM5 1U
x86 CPU,DOS,TASM (`FY{]Wz!
MODEL SMALL i4r8146D[
IDEAL UA}N
STACK 100H $SPA'63AC
Kzf^ras4u
DATASEG `beU2N
HW DB 'Hello, world!$' W"ldQ
$>!tpJw
CODESEG g"Gj8QLDz
MOV AX, @data |aMeh;X t
MOV DS, AX `w/b];e1)
MOV DX, OFFSET HW D./3,z
MOV AH, 09H 2&d|L|->
INT 21H P_Ni
5s)
MOV AX, 4C00H DS6g_SS3
INT 21H +n&9ZCH
END mUjM5ceAXO
&&
E)
h$rk]UM/Q
x86 CPU,GNU/Linux,NASM w@&(=C
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). mZ}C)&,m2
;Enter this into "hello.asm" then type: 1h#UM6
;"nasm -f elf hello.asm" MgUjB~)Y
;"ld hello.o -o hello" $7'KcG
;"./hello" G>w+J'7
1QJB4|5R#
section .data ;data section declaration L#9g ~>~
msg db 'Hello World!',0AH Vf] ;hm
len equ $-msg ;string length g.d~`R@v
;;lOu~-*$p
section .text ;code section declaration %hH@< <b(s
global _start ;entry point (start of execution) $V2.@X
_start: mov edx,len ;string length h;S?
mov ecx,msg ;string start l fJ
lXD
mov ebx,1 ;file handle: stdout BhCOT+i;c
mov eax,4 ;sys_write Y[Kpd[)[v
int 80h ;kernel system call ]d -U
G
"`t$=0
mov ebx,0 ;return value `as6IMqJD
mov eax,1 ;sys_exit Z}s56{!.
int 80h ;kernel system call 4]mAV\1
<n{-&;>
;LE9w^>^V
x86 CPU,Windows,MASM32 ,ou&WI yC
.386 tB==v{t
.model flat,stdcall `g!NFp9q
option casemap:none Tmr%r'i3
;Include 文件定义 >^ijj`{d
include windows.inc hz*H,E!>
include user32.inc z`KP
}-
includelib user32.lib 8bI;xjK^Q
include kernel32.inc pA?2UZ
includelib kernel32.lib w~l%xiC
;数据段 ?Q G?F9?
.data Zia<$kAO
szCaption db 'A MessageBox!',0 ~5sH`w~vQ
szText db 'Hello,world!',0 c&;Xjy
;代码段 BNpc-O~
.code :Wl`8p4]
start: \+Pk"M
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK n>aH7
invoke ExitProcess,NULL 68,(+vkB
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> gO,2:,
end start #xBh62yIuP
~;P>}|6Y
QDpzIjJj
AWK q"|#KT^)
BEGIN { print "Hello, world!" } p{S#>JTr
k$v8cE
6;{E-y
BASIC 3~6,fTMz{
传统版BASIC(例如GWBASIC): odNHyJS0
%"g; K
10 PRINT "Hello, world!" 3?:?dy(3z
20 END <`WtP+`
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或在提示符输入: WpPI6bd
MMS#Ci=Lj
?"Hello, world!":END |+r5D4]e
-5TMV#i
{
现代版BASIC(例如Quick BASIC): T
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TU}./b@F
Print "Hello, world!" 8PtX@s43\
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以下的语句在Quick BASIC中同样有效: ]#t5e>o|
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? "Hello,world!" Fb&WwGY,P
m?_@.O@]
A
^U`c'$
BCPL 1G62Qu$O
GET "LIBHDR" 4oywP^I
#xTu {
LET START () BE q;#:nf"
$( %;qDhAu0
WRITES ("Hello, world!*N") f$p7L.d<
$) DX#_0-o
|dI,4Z\Qb
!:|[?M.`
Befunge fw+ VR.#2H
"!dlrow olleH">v X'XH-E
, k*Vf2O3${
^_@ "'\f?A9
XX|wle1Kg
*^t7?f[
Brainfuck vg ^&j0
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< y&{ Z"+B5
+++++++++++++++.>.+++.------.--------.>+.>. d 0CFMy6
z }f;_NX
gt{$G|bi
C 'W]oQLD^R
#include <stdio.h> N_qKIc_R
@!:_r5R~N
int main(void) StWF66u34&
{ 6kM'f}t[C
printf("Hello, world!\n"); ;gmfWHB<
return 0; Y%A
KN
} c3G&)gU4q
M+Jcgb]
9&p;2/H
C++ *&sXC@^@^
#include <iostream> Oxq} dX7S
gg}^@h&?
int main() Z5%T pAu[
{ sksop4gu5
std::cout << "Hello, world!" << std::endl; "Ir.1FN
return 0; Mh;rhQ
} >HlQ+bl$xw
v'W`\MKY)
o YNp0Hc
C++/CLI $dgez#TPL
int main() .?CumaU
{ lM'yj}:~
System::Console::WriteLine("Hello, world!"); RFzMah?Q=j
} \QKr2|
kx_PMpc
JU\wvP5j
C# (C Sharp) jXALN
class HelloWorldApp dgsD~.((A
{ n`af2I2
public static void Main() gdVajOAu
{ GtNGrJU
System.Console.WriteLine("Hello, world!"); cgvD>VUw
} 6q]`??g.
} JD1D(
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<{yQNXf[
COBOL 4hh=z>$|l)
IDENTIFICATION DIVISION. zA?]AL(+YW
PROGRAM-ID. HELLO-WORLD. b/dyH
06peo
d
ENVIRONMENT DIVISION. BpQ/$?5E"
875BD U
DATA DIVISION. (!9ybH;T
0;pO QF
PROCEDURE DIVISION. z`Cq,Sz/
DISPLAY "Hello, world!". "-;l{tL
STOP RUN. 2r~&+0sBP
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N2_9V~!
Common Lisp h]z>H~.<*
(format t "Hello world!~%") Jxy94y*
b 7%O[
N>J"^ GX
DOS批处理 ~0~f
@echo off OK"B`*
echo "Hello, world!" ,J0BG0jB^u
wRi` L7
xHMbtY
Eiffel K@PQLL#yJp
class HELLO_WORLD :x<'>)6
xjDV1Xf*
creation x3>PM]r(V
make /2\%X`]<
feature g~AOKHUP
make is 8x J]K
local 4z##4^9g
io:BASIC_IO w
9mi2=
do @^';[P!
!!io 5V{zdS=
io.put_string("%N Hello, world!") /Xds+V^Z
end -- make `/z6Q"
end -- class HELLO_WORLD <_tkd3t#W
7~V,=WEe
CrIt h/Z
Erlang 'l}T_7g
-module(hello). \|}dlG
-export([hello_world/0]). `=h`:`
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hello_world() -> io:fwrite("Hello, World!\n"). $"/xi `
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bf3Njma%
Forth m% {4
." Hello, world!" CR =tv,B3Mo
1E*No1
!awfxH0
Fortran 6SIk,Isy8
WRITE(*,10) d:"]*EZ [
10 FORMAT('Hello, World!') rK\)
STOP t
TAqln|
END !Bv"S0
WD^!G;}
1.Ximom
HTML 8SGFzb! h
<HTML> BF_R8H,<%
<HEAD> RG)!v6
<TITLE> Hello World! </TITLE> @ KhDQ0v]5
</HEAD> (,gpR4O[
<BODY> >*PZ&"}M
<p>Hello World!</p> v){&g5djl
</BODY> f(h nomn
</HTML> &O