“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。 8L1oh j
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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》。 oQL59XOT4
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以下是用不同语言写成的Hello World程序的几个例子: 2z@\R@F
Ada 4);)@&0Md~
with Ada.Text_Io; use Ada.Text_Io; B7Tk4q\;Q
procedure Hello is Ia'ZV7'
begin Gxax2o
Put_Line ("Hello, world!"); sk|=% }y
end Hello; 2+Wzf)tB
^Eo=W/
8#&q$kE
汇编语言 s-ZI
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W@2vjz
x86 CPU,DOS,TASM e9E\% p
MODEL SMALL Ea(,aVlj
IDEAL &k8vWXMGk%
STACK 100H w;e(Gb%9
uZi.HG{<)
DATASEG &,.Y9;
b
HW DB 'Hello, world!$' Ei2%DMN7)
U/NBFc:[y:
CODESEG I_q~*/<h
MOV AX, @data ')N{wSM9Ft
MOV DS, AX A$WZF/x
MOV DX, OFFSET HW Bu]t*$
MOV AH, 09H LA[g(i 7
INT 21H v~/~@jv
MOV AX, 4C00H d
HJhFw
INT 21H 9*:gr#(5
END wIf
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Oi} T2I
&Sp -w?kM
x86 CPU,GNU/Linux,NASM ++Ww88820
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). e2-Dq]p
;Enter this into "hello.asm" then type: x^*1gv $o
;"nasm -f elf hello.asm" pN&c(=If
;"ld hello.o -o hello" m~'? /!!
;"./hello" Yh)Isg|0>
:L
3&FA
section .data ;data section declaration "<i SZ
msg db 'Hello World!',0AH CD0VfA>Z
len equ $-msg ;string length )RsM!}
dXn%lJ
section .text ;code section declaration 5TUNX^AW
global _start ;entry point (start of execution) s9oO%e<
_start: mov edx,len ;string length .4l/_4,s_
mov ecx,msg ;string start #Z~C`n
u
mov ebx,1 ;file handle: stdout %5\3Aw
mov eax,4 ;sys_write z5]bia,
int 80h ;kernel system call *{o UWt
wLV~F[:
mov ebx,0 ;return value ~l~Tk6EM
mov eax,1 ;sys_exit B[9 (FRX
int 80h ;kernel system call KL'zXkS
<:|3rfm#
tU/k-W3X
x86 CPU,Windows,MASM32 KTEZ4K^o=
.386 ggb|Ew
.model flat,stdcall 3CE[(
option casemap:none a8AYcEb
;Include 文件定义 yA[({2%
include windows.inc x&A vUJ
include user32.inc 19q{6X`x
includelib user32.lib |3?
8)z\n
include kernel32.inc e &9F\e
includelib kernel32.lib @uH#qg7
;数据段 _DP|-bp D
.data Fd\e*ww'
szCaption db 'A MessageBox!',0 A4mSJ6K]
szText db 'Hello,world!',0 OJb*VtZz5R
;代码段 s:y
^_W)d
.code (5$ZvXx?}
start: AD('=g J
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK VzlDHpG
invoke ExitProcess,NULL W
>(vYU
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> +' oX
end start IK^~X{I?
!8tS|C#2
insY(.N
AWK u2(eaP8d
BEGIN { print "Hello, world!" } W}'WA
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BASIC B
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传统版BASIC(例如GWBASIC): cyd~2\Kv~
!~-6wN"k
10 PRINT "Hello, world!" C0x"pO7
20 END /OGA$eP
9x`4RE
或在提示符输入: iz"3\{aN
(!?K7<Jv
?"Hello, world!":END )yxT+g2!
IJU0[EA]F
现代版BASIC(例如Quick BASIC): H]#Rg`~n
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Print "Hello, world!" .>6 Wv0
Z$ KV&.=+
以下的语句在Quick BASIC中同样有效: @\Js8[wS9@
2)/NFZ
? "Hello,world!" g\M5:Qm
`^UK
84&XW
BCPL gH:ArfC
GET "LIBHDR" Wf>^bFb"$
t0m*PJcF
LET START () BE x|~zHFm6
$( $GF]/;\m
WRITES ("Hello, world!*N") RHNk%9
$) #%S0PL"x U
$;D*
n'8Fx
.gYt0raSY
Befunge '5H4z7)
"!dlrow olleH">v $R^lo$(
, #2%([w
^_@ 8TZENRzx-|
Lu>H`B7Q"
nwM)K
Brainfuck 0-2"FdeQU
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< hRTMFgO
+++++++++++++++.>.+++.------.--------.>+.>. yFpySvj}
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=K$,E4*
C _dU P7H (
#include <stdio.h> Nf?\AK!
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int main(void) cBEHH4U
{ t;#Gmo
printf("Hello, world!\n"); zX5G;,_
return 0;
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} hG Apuy
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g*-2*
\
C++ |pWaBh|r
#include <iostream> # .q#OC
yBn_Kd
int main() jM__{z
{ d(L{!mm
std::cout << "Hello, world!" << std::endl; @"1}16b#f
return 0; m)f|:MM
} ?y-s20Kd
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C++/CLI MEU[%hty_
int main() J_ V,XO
{ zLek&s&-
System::Console::WriteLine("Hello, world!"); FDLd&4Ex
} V-vlTgemwc
W(@>?$&
k:P$LzIB
C# (C Sharp) %2yAvGa1
class HelloWorldApp ]*ov&{'
{ cgyo_
k
public static void Main() 4 iH&:Al
{ v.`+I-\.z)
System.Console.WriteLine("Hello, world!"); :t2B^})\
} /PC` 0/b
} #%cR%Z
jzrt7p*k}
'TX M{RGw
COBOL .xpmp6-
IDENTIFICATION DIVISION. Fp:3#Bh
PROGRAM-ID. HELLO-WORLD. :dDxxrs"
aIu2>
ENVIRONMENT DIVISION. my,x9UPs
?'2 v.5TQt
DATA DIVISION. %CT!$Y'n
P^(.tr3t
PROCEDURE DIVISION. &|=?acv
DISPLAY "Hello, world!". 4 =Fg!Eu<
STOP RUN. H7jTQW0rp5
cV]y=q6
7!-
\L7<
Common Lisp $-w5o`e
(format t "Hello world!~%") eU~?p|Np
ve%l({
SOI)/u
DOS批处理 &"AQ;%&N
@echo off L<)Z> @fR
echo "Hello, world!" 0P9Wy!f7
"/y|VTV"
*8206[y
Eiffel 5bBCpNa
class HELLO_WORLD DR{]sG
6S_y%8Fv&[
creation 0UD"^zgY
make r|bPR!0
feature )KE_t^$
make is M c@GH
local )l{A{f6O
io:BASIC_IO bs:QG1*.
do 2[BA(B
!!io uRGB/ju^E
io.put_string("%N Hello, world!") ,TJ/3_ lH
end -- make =kO@ Gk?
end -- class HELLO_WORLD 5Jw"{V?Ak
fKYKW?g;)Z
H PTHF
Erlang "GLYyC
-module(hello). \^m.dIPdO
-export([hello_world/0]). LJ
l1v
TMY{OI8 a
hello_world() -> io:fwrite("Hello, World!\n"). >D3zV.R
Hir(6Bt
(uT^Nn9L=
Forth 4ac1m,Jlt
." Hello, world!" CR ^yD"d =z
&vkp?UH
f MzYFM'i
Fortran y&3TQ]f\
WRITE(*,10) Zx9.p Fc"
10 FORMAT('Hello, World!') r8+*|$K
STOP )(.%QSA\C
END X}?ESjZJ
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{DS\!0T-X
HTML dh?S[|='
<HTML> XqX
I(q^
<HEAD> s+N^PX3
<TITLE> Hello World! </TITLE> }8
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</HEAD> &*ZC0V3
<BODY> @LHtt/&
<p>Hello World!</p> /evaTQPz
</BODY> ^
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</HTML> gb9[Meg'
i&1U4q
_&K\D
p&@
HQ9+ Yd.02 7
H ?.~]mvOR
bWUS9WT
sxt`0oE
INTERCAL R;.d/U|av
PLEASE DO ,1 <- #13 9g4QVo|
DO ,1 SUB #1 <- #238 jvWI_Fto
DO ,1 SUB #2 <- #112 LEA;dSf
DO ,1 SUB #3 <- #112 &E`9>&~J
DO ,1 SUB #4 <- #0 GP Ix@k
DO ,1 SUB #5 <- #64 tgK x 4
DO ,1 SUB #6 <- #238 +RdI;QmM
DO ,1 SUB #7 <- #26 -t%L#1k
DO ,1 SUB #8 <- #248 CR.bMF}
DO ,1 SUB #9 <- #168 `M,Nd'5&|
DO ,1 SUB #10 <- #24 b%<16 4i
DO ,1 SUB #11 <- #16 ]|;7R^o3|
DO ,1 SUB #12 <- #158 u8xk]:%
DO ,1 SUB #13 <- #52 o\:$V
PLEASE READ OUT ,1 FE>3 D1\
PLEASE GIVE UP F"Uh/EO<
U~Xf= f_Q$
!>q?dhw@
Java R[6 r(h
public class Hello sb`&bA;i
{ P~o@9RV-
public static void main(String[] args) (}sDm~;s
{ $e>/?Ss
System.out.println("Hello, world!"); Cv0&prt
} QZ?O;K1|y
} '+tKvTU;
HqB|SWyK
VVgsLQd
JSP yW[L,N7d
<% Jm%mm SYK
out.print("Hello, world!"); *ZX!EjICk
%> OA!R5sOz"
vP-3j
VPdwSW[eM
MIXAL @pTD{OW?
TERM EQU 19 the MIX console device number SHytyd
ORIG 1000 start address Q
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START OUT MSG(TERM) output data at address MSG U2VV[e)Z!
HLT halt execution >pN;J)H
MSG ALF "MIXAL" 7N!tp,?
ALF " HELL" _w\Y{(k
ALF "O WOR" q"P5,:W
ALF "LD " _s2m-jm7
END START end of the program {(_B
H\ {E%7^h-
~:2&/MOP?
Nuva C{DlcZ<
<..直接输出..> 9e0C3+)CY
Hello, world! .@fK;/OuC
Nvi Fq
<..或者..> _E3U.mV
0S%tsXt+
<. {qJHL;mP:8
// 不带换行 mJSK; @w<O
? "Hello, world!" @Q/x&BV
?e"Wu+q~L
// 或者 \I'f3
+SAk:3.#CV
// 带换行 ~*jsB=XM/
?? 'Hello, world!' 83\o(
.> @X3 gBGY)
2f`WDL
@][ a8:Y9I
OCaml "xL;(Fqu
let main () = f37ji
print_endline "Hello world!";; 20$F$YYuk
q-A`/9
fEx+gQW_
Pascal <jpe u^7
program Hello; Rrh<mo(yj#
begin m(8jSGV
writeln('Hello, world!'); oNiToFbQu
end. : =
]sq}IN
JmnBq<&,0
R)sp
Perl 3Ne9%"
#!/usr/local/bin/perl i7i|370
print "Hello, world!\n"; #;wkr))
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/'R UA
PHP muL>g_H
<?php LvSP #$f
print("Hello, world!"); b`(yu.{Jn
?> 9`)w@-~~
+9F^F>mu
NFrNm'v
Pike A2}Z
*U(;
#!/usr/local/bin/pike |h#DL$
int main() JZs|~@
{ %KbBH:z05
write("Hello, world!\n"); t-.2+6"\
return 0; dE 3i=
} I;`Ko_i
"bHtf_
~AEqfIx*^&
PL/I L4\SBO
Test: procedure options(main); &&]"Y!r -
declare My_String char(20) varying initialize('Hello, world!'); =-OCM*5~S
put skip list(My_String); t}5'(9
end Test; ,:0Q1~8
%E4$ZPSW
3X88x-3
Prolog DQ}_9?3
goal X{0ax.
write("hello,world!"). se<i5JsSV
a)I=U[
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Python UgF) J
#!/usr/local/bin/python gi1}5DR
print "Hello, world!" o|rGy5
n/KI"qa]9
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