“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。 2qjyFTT
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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》。 ` .$&T7
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以下是用不同语言写成的Hello World程序的几个例子: x)$2nonM
Ada }2=hd. .
with Ada.Text_Io; use Ada.Text_Io; !vVT]k[N
procedure Hello is WGPD8.
begin J)KnE2dw5
Put_Line ("Hello, world!"); ;Gh>44UM[
end Hello; {:$NfW
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汇编语言 ?M~
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x86 CPU,DOS,TASM ^N{k6>;
MODEL SMALL gvlFumg2
IDEAL (gU2"{:]J
STACK 100H ]w-.|vx
F 3s?&T)[G
DATASEG Mt=R*M}D0
HW DB 'Hello, world!$' {[tZ.1.w
#Z0-8<\
CODESEG (kY@7)d'e
MOV AX, @data 9DPb|+O-
MOV DS, AX %N1"*</q
MOV DX, OFFSET HW djGs~H>;U_
MOV AH, 09H cWM:
INT 21H 5NFRPGYX
MOV AX, 4C00H a%*_2#
INT 21H -K^41W71
END tgB=vIw?3
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x86 CPU,GNU/Linux,NASM R>HY:-2
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). }1@E"6kF
;Enter this into "hello.asm" then type: ^cn@?k((A
;"nasm -f elf hello.asm" #a'r_K=ch)
;"ld hello.o -o hello" sG1BNb_
;"./hello" ST%
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section .data ;data section declaration yV2e5/i
msg db 'Hello World!',0AH wASX\D }
len equ $-msg ;string length GFt1
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section .text ;code section declaration \Z'/+}^h
global _start ;entry point (start of execution) shzG
Eb
_start: mov edx,len ;string length uJ8x
mov ecx,msg ;string start #j.FJFGX
mov ebx,1 ;file handle: stdout #R<G,"N5
mov eax,4 ;sys_write b5S7{"<V
int 80h ;kernel system call mLaCkn
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mov ebx,0 ;return value %qi%$
mov eax,1 ;sys_exit '$6PTa
int 80h ;kernel system call S (tEwXy
R"{l[9j4>
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x86 CPU,Windows,MASM32 lRH0)5`
.386 Bq{]Eh0%
.model flat,stdcall [4\aYB 9N
option casemap:none u>}zm_
;Include 文件定义 t)'dF*L
include windows.inc .pW o >`"
include user32.inc nALnB1
includelib user32.lib 7UDq/:}Fo
include kernel32.inc L#!$hq9{_
includelib kernel32.lib ~j]dct7
;数据段 rKT)!o'
.data ?Q?598MC
szCaption db 'A MessageBox!',0
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szText db 'Hello,world!',0 X Ny
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;代码段 1a*6ZGk.
.code kC31$jMC3!
start: H:{?3gk.P3
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK 0R4akLW0
invoke ExitProcess,NULL &~ y{'zoL
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> *v&*% B
end start }H2#H7!H
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AWK ~QCA -Yud
BEGIN { print "Hello, world!" } RJwb@r<v
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BASIC rei5{PC
传统版BASIC(例如GWBASIC): `V@z&n0P6
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10 PRINT "Hello, world!" dE GX3 -
20 END 3fl7~Lw,
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或在提示符输入: B\/7^{i5
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?"Hello, world!":END ? oc+ 1e
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现代版BASIC(例如Quick BASIC): qCQu^S' iD
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Print "Hello, world!" ?b"Vj+1:x
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以下的语句在Quick BASIC中同样有效: y{92Lym
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? "Hello,world!" lz}llLb1
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!-ZP*V3}h
BCPL 1@@y]s_.a
GET "LIBHDR" sS|<&3
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LET START () BE O{nC^`X
$( g}YToOs
WRITES ("Hello, world!*N") B*2{M
$) zsQF,7/}B
qh H+m
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Befunge :l;,m}#@
"!dlrow olleH">v 6&mWIk^VC
, 8yvJ`eL-
^_@ *0\k
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Brainfuck hg4J2m
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< V_lGj
+++++++++++++++.>.+++.------.--------.>+.>. cCk1'D|X[e
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#include <stdio.h> ;AltNGcM
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int main(void) O/$ v69:
{ 9\:w8M X'
printf("Hello, world!\n"); DP0Z*8Ia
return 0; 3<3t;&e
} Z@u ;Z[@
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C++ Bu':2"7
#include <iostream> TG?fUD V
C`pan /t
int main() =O,e97
{ gkLr]zv
std::cout << "Hello, world!" << std::endl; oW8;^u
return 0; f@L\E>t
} =@%MV(
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C++/CLI 1&} G+y
int main() ONNW.xHp
{ 'h k @>"
System::Console::WriteLine("Hello, world!"); [XxA.S)x3
} 9 #:ue@)
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C# (C Sharp) IN>TsTo
class HelloWorldApp N]*!8
{
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public static void Main() ^,>}%1\
{ (KZUvsS k
System.Console.WriteLine("Hello, world!"); )2/b$i,JKk
} %$^$'6\77
} >[hrJn[
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COBOL %bN"bxv^
IDENTIFICATION DIVISION. UX?X]ZYVR
PROGRAM-ID. HELLO-WORLD. "1AjCHZ
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ENVIRONMENT DIVISION. =\*S'Ded
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DATA DIVISION. :K?iNZqWN6
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PROCEDURE DIVISION. hY)YX,f=S
DISPLAY "Hello, world!". \A~4\um
STOP RUN. =y`-sU Hx
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Common Lisp g}^4^88=a
(format t "Hello world!~%") m79m{!q$-
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l8eT{!4
DOS批处理 UX03"gX
@echo off Idt@Hk5<&
echo "Hello, world!" zv>ZrFl*
Z5 w`-#
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Eiffel
4{c`g$j>
class HELLO_WORLD M,I68
F@oT7NB/n
creation VNr!|bp5
make 4c~*hMry
feature }6F_2S3c
make is w}fqs/)w
local `Nc`xO?
io:BASIC_IO h4B+0
do 7m vSo350
!!io eYPt
io.put_string("%N Hello, world!") f'8B[&@L
end -- make "0p +SZ~D
end -- class HELLO_WORLD ] `b<"
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Erlang UXXqE4x
-module(hello). R;5QD`
-export([hello_world/0]). hlYS=cgY=
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hello_world() -> io:fwrite("Hello, World!\n"). k
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p7?CeyZ-V
Forth `Pz!SJ|
." Hello, world!" CR .2 N_?
w yuJSB
Ep#<$6>
Fortran U)IsTk~}O
WRITE(*,10) 0%(4G83gw
10 FORMAT('Hello, World!') w>1l@%Uo
STOP *)}Ap4[
END _ d(Ks9
|1\dCE03}
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HTML ,_e/a
<HTML> Huug_E+
<HEAD> Q9Xmb2LN
<TITLE> Hello World! </TITLE> z[$9B#P
</HEAD> 8H$@Xts
<BODY> NUxAv= xl
<p>Hello World!</p> <*b]JY V@
</BODY> Y;%R/OyWY
</HTML> P"h,[{Y*>
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H ux/[d6To
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F(J!dG5#
INTERCAL qNuv?.7
PLEASE DO ,1 <- #13 S3JygN*
DO ,1 SUB #1 <- #238 =."WvBKg
DO ,1 SUB #2 <- #112 XQ4^:3Yc
DO ,1 SUB #3 <- #112 <|>:UGAR
DO ,1 SUB #4 <- #0 n<"a+TTU
DO ,1 SUB #5 <- #64 R;Ix<y{U
DO ,1 SUB #6 <- #238 NiJ?no
DO ,1 SUB #7 <- #26 Ow&'sR'CX
DO ,1 SUB #8 <- #248 %(wsGNd
DO ,1 SUB #9 <- #168 4)>\rqF+v
DO ,1 SUB #10 <- #24 ?6l,
DO ,1 SUB #11 <- #16 Ms$7E
DO ,1 SUB #12 <- #158 XH Zu>[
DO ,1 SUB #13 <- #52 1H2u,{O
PLEASE READ OUT ,1 (^@;`8Dy8
PLEASE GIVE UP e[VJ0 A=
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Java BX)cV
public class Hello ?RjKP3P
{ `
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public static void main(String[] args) /Z9`uK
{ =*)O80oaW
System.out.println("Hello, world!"); =jd=Qs IL
} kHIQ/\3?Q
} !E.lyz
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JSP }JTgj
<% JMe[
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out.print("Hello, world!"); gSo(PW)
%> =rtA{g$)+
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MIXAL x[uXD
TERM EQU 19 the MIX console device number l?<z1Acd&
ORIG 1000 start address ^Th"`Av5
START OUT MSG(TERM) output data at address MSG J,M5<s[Xqt
HLT halt execution EQ`t:jc{
MSG ALF "MIXAL" _w,0wn9N$
ALF " HELL" ,ce^"yG
ALF "O WOR" JGNxJ S<]
ALF "LD " C-
Rie[
END START end of the program %_=R&m'n`
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Nuva {EHG |
<..直接输出..> I\6<)2j/L
Hello, world! 5Cyjq0+
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<..或者..> 4W-+k
.`#R%4Xl
<. /g7?,/vnZ
// 不带换行 b1^Yxe#L
? "Hello, world!" ,ST.pu8N.
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// 或者 yQ&%* ?J
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// 带换行 s3!LR2qiF
?? 'Hello, world!' G6bg ~V5Q:
.> To?
bp4
wz)9/bL
kU>|E<c*
OCaml r:rJv
let main () = &nw~gSe
print_endline "Hello world!";; ov>L-
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mSM
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Pascal {S(T1ua
program Hello; ~o5iCt;w
begin / {~h?P}
writeln('Hello, world!'); Z-!T(:E]
end. M 7$4KFNp
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Perl MCG~{#`
#!/usr/local/bin/perl kovzB]
print "Hello, world!\n"; Bz~h-
(.+n1)L?
@!O{>`
PHP ') y~d
<?php zD-8#H35X"
print("Hello, world!"); XnOl*#P
?> e1Hx"7ew_
:!hH`l}p
^uzVz1%mM
Pike K 5[ 3WHQ
#!/usr/local/bin/pike [nD4\x+
int main() tpK4 gjf
{ m/Z_ HER^
write("Hello, world!\n"); "PtH
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return 0; *X=-^\G
} e84TLU?~
hDsORh!i
CU_06A|}
PL/I }iAi`_\0;
Test: procedure options(main); JqZ5DjI:
declare My_String char(20) varying initialize('Hello, world!'); [_@OCiV5)
put skip list(My_String); s&</zU'
end Test; )v0vdAh'b
w[-Bsf
@eWx4bl
Prolog mNKa~E
goal q4=RE
write("hello,world!"). &@-glF5
?|dz"=y
dz 2d`=`3
Python oMbCljUC
#!/usr/local/bin/python =
xk@ Q7$
print "Hello, world!" |?kH]Trr
8>9+w/DL
H"l'E9k.&p
REXX D6WsEd>
say "Hello, world!" e hq6.+l
.bGeZwvf:G
kZNZ?A<D
Ruby ,+&j/0U
#!/usr/bin/ruby k|5nu-B0v
print "Hello, world!\n" -,&Xp>u\
Cn<