“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。 (0k0gq;
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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》。 &B3kzs
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以下是用不同语言写成的Hello World程序的几个例子: d~n+Ds)%F
Ada 6\]-J*e>
with Ada.Text_Io; use Ada.Text_Io; Pjx9@i
procedure Hello is .*,Zh2eXU
begin ;ndg,05_
Put_Line ("Hello, world!"); L%BWrmg
end Hello; GY4yZa
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汇编语言 BY 1~\M
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x86 CPU,DOS,TASM q5`Gl
MODEL SMALL |6uEf/*DX
IDEAL F:H76O` 8
STACK 100H cJty4m-
Y /wvn8~C
DATASEG jRBx7|ON
HW DB 'Hello, world!$' (*2"dd
gNO$WY^
CODESEG :bh[6F
MOV AX, @data 9\"~ G)
MOV DS, AX 6HEl1FK{@
MOV DX, OFFSET HW ;or> Sh7
MOV AH, 09H mg3jm
INT 21H ~ PP GU1
MOV AX, 4C00H E O}(MXS
INT 21H ^oP]@r"qy
END @emZwN"m
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x86 CPU,GNU/Linux,NASM $4?%Z>'
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). k20H|@g2
;Enter this into "hello.asm" then type: ht =yzJ9Pr
;"nasm -f elf hello.asm" =6 [!'K
;"ld hello.o -o hello" )XNcy"
;"./hello" bM!`C|,[s
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section .data ;data section declaration !O.B,
msg db 'Hello World!',0AH Q/+a{m0f
len equ $-msg ;string length w"Z>F]YZ
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section .text ;code section declaration lmd0Q(I
global _start ;entry point (start of execution)
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_start: mov edx,len ;string length 1n5&PNu
mov ecx,msg ;string start ]-q:Z4rb
mov ebx,1 ;file handle: stdout [F>zM
mov eax,4 ;sys_write n%O`K{86
int 80h ;kernel system call kP| !!N
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mov ebx,0 ;return value |g9^]bT
mov eax,1 ;sys_exit ]:f1r8<3p
int 80h ;kernel system call Z@*Z@]FC
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x86 CPU,Windows,MASM32 oL~Yrb%R
.386 Obd!
.model flat,stdcall <6`,)(dj
option casemap:none _%>.t
;Include 文件定义 R@EFG%|`_
include windows.inc 6tzn% ?
include user32.inc O8lOr(|l
includelib user32.lib !P;qc
include kernel32.inc 6z(_^CY
includelib kernel32.lib 5-g0 2g
;数据段 `ybZE+S.
.data &fTCY-W[
szCaption db 'A MessageBox!',0 <>R7G)w
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szText db 'Hello,world!',0 kxO$Uk&TX
;代码段 d*G$qUiX
.code *[jaI-~S
start: i0R=P[
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK |[V(u
invoke ExitProcess,NULL f]hW>-B(q
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> (Hsfrc
end start .!`j3W]
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BEGIN { print "Hello, world!" } Wl,yznT
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BASIC b!N`@m=
传统版BASIC(例如GWBASIC): B U)4g[4
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10 PRINT "Hello, world!" 6?`py}:
20 END QR#,n@fE
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或在提示符输入: EUNG&U
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?"Hello, world!":END m:H )b{
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现代版BASIC(例如Quick BASIC): ffWvrY;j[
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Print "Hello, world!" +yTL
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以下的语句在Quick BASIC中同样有效: ePF9Vzq
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? "Hello,world!" {4I sz-P
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BCPL 4ASc`w*0
GET "LIBHDR" ik]UzB
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LET START () BE -V+fQGZe
$( ;<* VwXJR
WRITES ("Hello, world!*N") 1wq6E
$) [m4<j
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Befunge H<q:+
"!dlrow olleH">v > vahj,CZZ
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Brainfuck 1\3n
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< 7+z%O3k'I
+++++++++++++++.>.+++.------.--------.>+.>. )i?wBxq'MA
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C Coyop#q#"{
#include <stdio.h> i\3`?d
R` N-^x
int main(void) -W oZwqh
{ #\"5:.H Oz
printf("Hello, world!\n"); {:"bX~<^
return 0; d)
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} 4A*'0!H
_ '}UNIL
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C++ J4JKAv~3
#include <iostream> Y`_6Ny="
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int main() w</kGK[O
{ @1kA%LLK
std::cout << "Hello, world!" << std::endl; {>~|xW
return 0; x;C\G`9N
} NTn-4iJy
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C++/CLI p_}OtS;
int main() U>{z*D
{ 3cs'Oz<w
System::Console::WriteLine("Hello, world!"); *l5/q\D
} rSa3u*xB
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C# (C Sharp) FkRrW^?5G
class HelloWorldApp Z*oGVr
g
{ tewC *%3V
public static void Main() \Q
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{ 2AdV=n6Z
System.Console.WriteLine("Hello, world!"); ,H|V\\
} Iz ,C!c
} \oaO7w,:"
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COBOL -ERDW Y
IDENTIFICATION DIVISION. JWEqy+,Fjw
PROGRAM-ID. HELLO-WORLD. HtXzMSGo7
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ENVIRONMENT DIVISION. |{Oe&j3|
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DATA DIVISION. 6 s*#y[$
X)'uTf0
PROCEDURE DIVISION. C7nLa@
DISPLAY "Hello, world!". i5rAb<q`
STOP RUN. ;]'mx
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Xo'_|-N+
Common Lisp 0(64}T)
(format t "Hello world!~%") 3Hr ZN+D
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\# #~Tq
DOS批处理 eM{+R^8
@echo off @C?RbTHy
echo "Hello, world!" ?a(ApD\
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$_NVy>\&
Eiffel Z~v.!j0
class HELLO_WORLD pWeKN`
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creation QKe=/;
make HD$W\P
feature 2x t
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make is zsWYV n]
local \|Us/_h
io:BASIC_IO CGPPo;RjK
do RtN5\
!!io f7\$rx
io.put_string("%N Hello, world!") "*<9)vQ6|
end -- make <kp?*xV]]
end -- class HELLO_WORLD ss.wX~I
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Erlang *ewE{$UpK
-module(hello). yX/ 9jk
-export([hello_world/0]). jsjH.O
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hello_world() -> io:fwrite("Hello, World!\n"). bF<FX_}!s!
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}H\wed]F/
Forth +%oXPG?
." Hello, world!" CR ]~GwZB'M
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Fortran ,A4v|]kq]
WRITE(*,10) up#W"`"
10 FORMAT('Hello, World!') zXIVHC,"{
STOP VPet1hAy
END ~4<xTP\*
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!T!U@e=u
HTML Jt^a
<HTML> ;3'ta!.c
<HEAD> UBLr|e>dQE
<TITLE> Hello World! </TITLE> lmfvT}$B
</HEAD> r".*l?=
<BODY> z;J"3kM
<p>Hello World!</p> <Y9%oJn%
</BODY> A_i=hj2f
</HTML> 9rf6,hF
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HQ9+ $qV, z
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(p>?0h9[
(_ HwU/
INTERCAL J>y}kzCz
PLEASE DO ,1 <- #13 8KiG(6*Q
DO ,1 SUB #1 <- #238
LhKaqR{
DO ,1 SUB #2 <- #112 5bKM}?=L
DO ,1 SUB #3 <- #112 $SQUN*/>
DO ,1 SUB #4 <- #0 [3"k :
DO ,1 SUB #5 <- #64 F0(P2j
DO ,1 SUB #6 <- #238 >k }ea5+
DO ,1 SUB #7 <- #26 rO[ cm}
DO ,1 SUB #8 <- #248 >g+yw1nC
DO ,1 SUB #9 <- #168 ~4fUaMT
DO ,1 SUB #10 <- #24 P{-j^'y
DO ,1 SUB #11 <- #16 4YX/=
DO ,1 SUB #12 <- #158 o<cg9
DO ,1 SUB #13 <- #52 1DLAfsLlj
PLEASE READ OUT ,1 Q8.=w
PLEASE GIVE UP q!iSY
LDc?/
Z1
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Java qQ6rF
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public class Hello ?71?Vd
{ ^hiIMqY_{`
public static void main(String[] args) b~>kTO
{ hg4 d]R,
System.out.println("Hello, world!"); tpPP5C{
} RUco3fZ
} >}?jO B
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rZ'&'#Q
JSP F#-mseKhc
<% ",O |uL
out.print("Hello, world!"); Z(F['Zf
%> [ICFPY6
xP/?E
!>RDHu2n
MIXAL 71b0MHNkvv
TERM EQU 19 the MIX console device number E.LD1Pm0
ORIG 1000 start address aG_@--=
START OUT MSG(TERM) output data at address MSG pW5ch"HE
HLT halt execution #!?jxfsFa
MSG ALF "MIXAL" ?TWve)U
ALF " HELL" 7qsu0 .[d
ALF "O WOR" e%[0
NVo
ALF "LD " w.X MyHj
END START end of the program (w[#h9j
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Nuva 27J!oin$
<..直接输出..> N>
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Hello, world! ?qC6p|H
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<..或者..> #
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<. L!;"73,&(8
// 不带换行 05>mR qVL
? "Hello, world!" c~``)N
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// 或者 'Dn\.x^]1
[J!jp&o
// 带换行 A4uKE"WE
?? 'Hello, world!' j)nL!":O
.> @6lw_E_5
*qa.hqas
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OCaml 2NMg+Lt8v
let main () = p~'iK4[&6
print_endline "Hello world!";; >V%lA3
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Pascal C]EkVcKFA
program Hello; *c<6 Er>s
begin {'8td^JEE
writeln('Hello, world!'); |E?PQ?P
end. r=Tz++!
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JtvZ~s
Perl ]SC|%B_*
#!/usr/local/bin/perl R?t_tmKXC!
print "Hello, world!\n"; /9pN.E
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q@Aw]Kh
PHP o;TS69|D
<?php VQ"Z3L3-4
print("Hello, world!"); J8'1 ~$6
?>
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Pike 8TBv~Qu
#!/usr/local/bin/pike FMOO
int main() Rtu"#XcBw+
{ @
D,]v:
write("Hello, world!\n");
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return 0; %}IrZrh
} <Hf3AB;#4
;FGS(.mjlC
c>Tf@Aog>
PL/I de/oK c
Test: procedure options(main); DaS~bweMw
declare My_String char(20) varying initialize('Hello, world!'); mv,5Q6!
put skip list(My_String); 29AE B
end Test; C 547})
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Prolog GaCRo7
goal 7{Lp/z%r
write("hello,world!"). o:'@|(&