“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。 DbtF~`3, .
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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》。 c
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以下是用不同语言写成的Hello World程序的几个例子:
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Ada 9!}q{2j
with Ada.Text_Io; use Ada.Text_Io; Z>2]Xx%
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procedure Hello is aD ESr?
begin 7Ms90oE/c
Put_Line ("Hello, world!"); V7C1FV2
end Hello; C),7- ?
nm @']
DMd ,8W7a
汇编语言 q (>c`5
P+Z\3re
x86 CPU,DOS,TASM /\J|Uj
MODEL SMALL =j~Q/-`EC0
IDEAL -eml
STACK 100H -;pOh;WG
0pN{y}x,
DATASEG !;dSC<
HW DB 'Hello, world!$' (A{NF(
Q\9K2=4
CODESEG } 0M{A+
MOV AX, @data z(H?VfJo
MOV DS, AX -@M3Dwsi3
MOV DX, OFFSET HW {Q~7M$
MOV AH, 09H .Xd0
Q=1h
INT 21H MEq"}zrh
MOV AX, 4C00H Np2ci~"<.
INT 21H =g~j=v,e
END ~R.dPUr
/\E [
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x86 CPU,GNU/Linux,NASM {QQl$ys/
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). 4:1)~z
;Enter this into "hello.asm" then type: y3IWfiz>/d
;"nasm -f elf hello.asm" #3MKH8k&~
;"ld hello.o -o hello" ^od<JD4
;"./hello" nl
n OwyMJ
;7rv
section .data ;data section declaration Q$a
msg db 'Hello World!',0AH Hwu4:^OL|
len equ $-msg ;string length u~F~cDu
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section .text ;code section declaration ;>ozEh#8w
global _start ;entry point (start of execution) 5=Lq=,K$
_start: mov edx,len ;string length C6QbBo
mov ecx,msg ;string start nPA@h
mov ebx,1 ;file handle: stdout ;dQAV\
mov eax,4 ;sys_write &88oB6$D^q
int 80h ;kernel system call !buz<h
Cs1>bpY*R6
mov ebx,0 ;return value 8MZ$T3IM
mov eax,1 ;sys_exit %Q4i%:Qi
int 80h ;kernel system call |y1;&<
&;>4N"]
'HaD~pa
x86 CPU,Windows,MASM32 C-SLjJw
.386 PC/!9s0W
.model flat,stdcall 'Q|c@t
option casemap:none EW(J5/mn
;Include 文件定义 oNYZIk:
include windows.inc 7z'ha?
include user32.inc C}"@RHEu
includelib user32.lib 0I%: BT
include kernel32.inc `X8@/wf#
includelib kernel32.lib A 's-'8m
;数据段 BD*G1k_q
.data ]QrR1Rg
szCaption db 'A MessageBox!',0 \:/Lc{*}MD
szText db 'Hello,world!',0 ' 4O-
;代码段 <P4FzK
.code ,XB%\[pKe
start: jP=Hf=:$
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK # cFr
invoke ExitProcess,NULL 2wlKBSON
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> V|FrN*m
end start n WaNT-
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@x{`\AM|%
AWK G0d&@okbFC
BEGIN { print "Hello, world!" } Z4q~@|+%
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a.kbov(
BASIC p3]Q^KFS
传统版BASIC(例如GWBASIC): T|) {<
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10 PRINT "Hello, world!" g8pO
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20 END Lp&k3?W
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或在提示符输入:
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?"Hello, world!":END :td ~g;w
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现代版BASIC(例如Quick BASIC): W!la -n
FN87^.^2S
Print "Hello, world!" uzU{z;
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以下的语句在Quick BASIC中同样有效: FxW&8 9G
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? "Hello,world!" ERz;H!pU8
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BCPL a)s;dp}T%
GET "LIBHDR" _GA$6#]
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LET START () BE {^ec(EsO#
$( ${r[!0|
WRITES ("Hello, world!*N") AHbZQulC
$) 0!GAk
v/QUjXBr
OI/@3"L{
Befunge cDkV;$
"!dlrow olleH">v "VUYh$=[
, S\x=&R z
^_@ ;y>a
nE}n{
n! h7
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Brainfuck aMuVqZw
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< VG@};dwbz*
+++++++++++++++.>.+++.------.--------.>+.>. Z|m`7xeCy
t;q7t!sC]
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C Mt>oI SN&d
#include <stdio.h> uGH?N
Hh[Tw&J4
int main(void) RYR-K^;R
{ ?A*Kg;IU
printf("Hello, world!\n"); Pcd *">v
return 0; I*|P@0
} Qs 2.ef?
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p3951-D
C++ eny/
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#include <iostream> Z=z%$l
9.OA, 6
int main() P
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{ hUpnI@
std::cout << "Hello, world!" << std::endl; b'p4wE>
return 0; n.6T
OF
} 'xK.UI
kyYLP"oB=
2?7(A
C++/CLI s}5+3f$f
int main() \.{AAj^qD
{ IzLF'F
System::Console::WriteLine("Hello, world!"); fC-P.:F#I
} LO%!Z,}
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R=)55qu
C# (C Sharp) </zXA$m
class HelloWorldApp r|<DqTc6l
{ x34f9!
't
public static void Main() X$?3U!
{ @\P4/+"9
System.Console.WriteLine("Hello, world!"); F3U` ueP
} 9i$NhfOe
} K!z`
@I3eK^#|P
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COBOL pf" <!O[
IDENTIFICATION DIVISION. Gctsp2ndW
PROGRAM-ID. HELLO-WORLD. 4\otq%Y
;\;M =&{}
ENVIRONMENT DIVISION. kyw/LE3$-
s Kicn5
DATA DIVISION. MmTC=/j
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PROCEDURE DIVISION. B~o-l*
DISPLAY "Hello, world!". Cr ?4Ngw
STOP RUN. \6I+K"
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Common Lisp ->{d`-}m'
(format t "Hello world!~%") A
Io|TD5{~
&}6KPA;
z;\d L
DOS批处理
W-~n|PX8+
@echo off dP2irC%f8
echo "Hello, world!" e 8\;t"D
2;3f=$3
Y4.Eq+$gh
Eiffel 0u
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class HELLO_WORLD O\KQl0*l\\
2.e
vx
creation d@C&+#QDF
make `Nh"
feature F/d7q%I
make is |Hr:S":9
local bvBHYf:^
io:BASIC_IO K4Dp:2/K%
do UaG1c%7?X
!!io %(/!ljh_
io.put_string("%N Hello, world!")
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end -- make zvc`3
end -- class HELLO_WORLD az;Q"V'6
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?L)
!pP]
Erlang Z;Rp+X
-module(hello). 2S3lsp5!
-export([hello_world/0]). >ydRSr^
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hello_world() -> io:fwrite("Hello, World!\n"). q"qo.TPh|$
Ty(@+M~-
L)QE`24
Forth pE.PX
8
." Hello, world!" CR b^c9po
~tFqb<n
F1%vtk;2?
Fortran eas:6Q)
WRITE(*,10) CI:^\-z
10 FORMAT('Hello, World!') b#)UUGmI
STOP g?v\!/~(u
END ZSy?T
)2q~u%9n
U).*q?.z
HTML FbnO/! $8
<HTML> /2M.~3gQ
<HEAD> %h"z0@+
<TITLE> Hello World! </TITLE> IxR?'
</HEAD> _M[,!{ C
<BODY> |wE3UWsy
<p>Hello World!</p> OYC_;CP
</BODY> YNrp}KQ
</HTML> }V;+l8
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V==z"
HQ9+ o'<^LYSnB
H )&{K~i ;:
~9\WFF/
S\6[EQ65
INTERCAL Nr<`Z
PLEASE DO ,1 <- #13 6C4'BCYW(
DO ,1 SUB #1 <- #238 [[~w0G~1
DO ,1 SUB #2 <- #112 V}o n|A
DO ,1 SUB #3 <- #112 &M/0g]4p
DO ,1 SUB #4 <- #0 ~n')&u{
DO ,1 SUB #5 <- #64 4n1; Bh$
DO ,1 SUB #6 <- #238 RC|!+TD
DO ,1 SUB #7 <- #26 x.0p%O=`
DO ,1 SUB #8 <- #248 ajRSMcKb7i
DO ,1 SUB #9 <- #168 R2L;bGI*J
DO ,1 SUB #10 <- #24 wv
QMnE8\
DO ,1 SUB #11 <- #16 Xd E`d.
DO ,1 SUB #12 <- #158 SQ,?N
XZ
DO ,1 SUB #13 <- #52 I2$T"K:eo
PLEASE READ OUT ,1 dm"n%
PLEASE GIVE UP 0n ~ Zz
\k`n[{
1
Q-bYJG
Java f=!PllxL:
public class Hello j6~nE'sQ
{ p47S^gW
public static void main(String[] args) e7fiGl
{ `u!l3VZ/4
System.out.println("Hello, world!");
@=]~\[e\
} bb42v7?
} e6X[vc|Y}
g>d;|sK
iz(u=/*\
JSP 5 )2:stT73
<% ^[Ua46/" m
out.print("Hello, world!"); *?+V65~dW
%> c(co\A.]:6
B()/.w?A
to8X=80-3
MIXAL r!P}u
TERM EQU 19 the MIX console device number DcMJ^=r8O:
ORIG 1000 start address ]`g<w#
START OUT MSG(TERM) output data at address MSG e}@)z3Q<l
HLT halt execution ~A<H9Bw
MSG ALF "MIXAL" O9'x-A%
ALF " HELL" IvpcSam'
ALF "O WOR" p5O",3,A4
ALF "LD " h=kQ$`j6
END START end of the program t:JI!DR
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M L7\BT
Nuva `G1&Z]z
<..直接输出..> 04J}UE]Ww
Hello, world! sC00un%
O=)
<..或者..> >vrxP8_
*'"T$ib
<. k"kJ_(
// 不带换行 C 8#@+ Q.
? "Hello, world!" a"/#+=[
d|Gl`BG
// 或者 \^1+U JU
N3t0-6$_
// 带换行 H9 C9P17
?? 'Hello, world!' E^_wI>
.> w(L>#?
q;5i4|
c[}(OH
OCaml eMOD;{Q?X
let main () = <";,GaZQ
print_endline "Hello world!";; A392=:N+Q
I"AYWo?
9/ SXs0
Pascal 6#}93Dgv4
program Hello; oHM
]
begin $@\mpwANl
writeln('Hello, world!'); %xwIt~Y
end. JO&JP3N1
OQ :dJe6
#8{F9w<Rf
Perl L?_7bXoD
#!/usr/local/bin/perl )f+U~4G&
print "Hello, world!\n"; _a_xzv'
]U[X1W+@
$=sXAK9
PHP ;E~4)^
<?php 6*9}4`
print("Hello, world!"); -]Cc
?> sDqe(x}a
%zC[KE*~
"SN4*
Pike 4vK8kkW1
#!/usr/local/bin/pike _ 7oV<
int main() ;TQf5|R\K
{ 3`hUo5K
write("Hello, world!\n"); &