“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。 &gY578tU
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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》。 l`zhKj
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以下是用不同语言写成的Hello World程序的几个例子: <<u]WsW{C
Ada (m:Q'4Ep
with Ada.Text_Io; use Ada.Text_Io; ) hs&?:)
procedure Hello is \tYImh
begin JCnHEH
Put_Line ("Hello, world!"); O}zHkcL
end Hello; npltsK):
4 H0rS'5d
YiO}"
汇编语言 UTh2?Rh/
)/@KdEA:
x86 CPU,DOS,TASM s_/@`kd{
MODEL SMALL v77UE"4|c
IDEAL f?tU5EX
STACK 100H Rf8Obk<
`WOoC
DATASEG ]pBEoktp
HW DB 'Hello, world!$' DSqA}r
9DhM 9VU
CODESEG ygnZ9ikh<-
MOV AX, @data hRX9Du`$
MOV DS, AX =Pw{1m|k
MOV DX, OFFSET HW $I*}AUp
v?
MOV AH, 09H ,.p
36ZLP
INT 21H Ve%ua]qA
MOV AX, 4C00H U<0Wa>3zj
INT 21H ;&=CZ6vH
END }.)R#hG?
S8dfe~ |7:
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x86 CPU,GNU/Linux,NASM &,%n
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). Jw}t~m3
;Enter this into "hello.asm" then type: a5/, O4Q
;"nasm -f elf hello.asm" fVgK6?<8^
;"ld hello.o -o hello" }Y.YJXum
;"./hello" T90O.]S
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section .data ;data section declaration DCiU?u~
msg db 'Hello World!',0AH Zqm%qm:
len equ $-msg ;string length 2[`n<R\
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section .text ;code section declaration 0vfMJzk
global _start ;entry point (start of execution) 2WH(c$6PWf
_start: mov edx,len ;string length 6AJ`)8HX
mov ecx,msg ;string start wE.jf.q
mov ebx,1 ;file handle: stdout 1gK^x^l*f
mov eax,4 ;sys_write P_0X+Tz
int 80h ;kernel system call YQC.jnb2
'6qH@r4Z<
mov ebx,0 ;return value WuY#Kx~2
mov eax,1 ;sys_exit U.SC,;N^
int 80h ;kernel system call iu=Mq|t0
)uHat#
[>?|wQy >=
x86 CPU,Windows,MASM32 4z5qXI/<m4
.386 faRQj:R8
.model flat,stdcall ?GNRab
option casemap:none 9)vU/fJ|
;Include 文件定义 6/L[`n"G
include windows.inc _VdJFjY?zc
include user32.inc u;nn:K1QFr
includelib user32.lib n$SL"iezW?
include kernel32.inc bS8$[7OhX
includelib kernel32.lib h )Y.jY
;数据段 Ne|CWUhO
.data $!9U\Au>2
szCaption db 'A MessageBox!',0 A}9^,C$#
szText db 'Hello,world!',0 3l~7
;代码段 }GURq#
.code <Rw2F?S~)n
start: kYkA^Aq
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK $m5Iv_
invoke ExitProcess,NULL N<<wg{QO
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> #@BhGB`9Qt
end start yxu7YGp%
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+0[H`5-^
AWK 9'H:pb2
BEGIN { print "Hello, world!" } /1/'zF&R-
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BASIC t&43)TPb.
传统版BASIC(例如GWBASIC): -!~pa^j
RjUrpS[I
10 PRINT "Hello, world!" j7g>r/1eE
20 END ^^ix4[1$Z
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或在提示符输入: ,|$1(z*a{c
$ bMmyDw
?"Hello, world!":END dRzeHuF92
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现代版BASIC(例如Quick BASIC): \PN*gDmX
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Print "Hello, world!" e/g9r
k}g4?
以下的语句在Quick BASIC中同样有效: qmnl
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? "Hello,world!" r\fkx>
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?
}ff O
BCPL ux^rF
GET "LIBHDR" !sI^Lh,Y
jt6_1^
LET START () BE 9wfE^E1
$( ?Mo)&,__
WRITES ("Hello, world!*N") F#9^RA)9
$) ZGh6- /
<nk/w5nKL
#o~C0`8!B=
Befunge oc-&}R4=
"!dlrow olleH">v *\:sHVyG(
, 9f&
!Uw_W
^_@ X*7VDt=
,tZL"
:/Pxf N5
Brainfuck _8PNMbv{
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< fA1{-JzV<4
+++++++++++++++.>.+++.------.--------.>+.>. PQ_A^ 95
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be-HF;lZe'
C ODRy
#include <stdio.h> -0`n(`2
D{d%*hlI 3
int main(void) t&JOASYC
{ &%(Dd
printf("Hello, world!\n"); `N}Vi6FG
return 0; O`_, _
} )j}#6r
)JyB
FnOahLS
C++ >U\P^yU
#include <iostream> ]T5\LNyN
<ir]bQT
int main() By[M|4a
{ 5(1c?biP&
std::cout << "Hello, world!" << std::endl; eFy
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return 0; >*B59+1P
} +,7vbs3
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4;32f`
C++/CLI @+Nf@LJ
int main() VL"Cxs
{ fO#nSB/
8
System::Console::WriteLine("Hello, world!"); :!$+dr(d
} VS`{k^^
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C# (C Sharp) <f)T*E^5%
class HelloWorldApp 'Zex/:QS
{ x@)cj
public static void Main() M.qv'zV`xG
{ qOQ8a:]?
System.Console.WriteLine("Hello, world!"); H;AMRL o4z
} ]d{lS&PRlg
} `25<;@
)3|a_
p74Nd4U$s
COBOL |#xBC+
IDENTIFICATION DIVISION. 3H>\hZ
PROGRAM-ID. HELLO-WORLD. P%R9\iajH
;ioF'ov
ENVIRONMENT DIVISION. N?,
BVus3Y5IJQ
DATA DIVISION. [ gR,nJH.
eMn'z]M&]
PROCEDURE DIVISION. PN J&{4wY
DISPLAY "Hello, world!". 64"DT3:
STOP RUN. }=gD,]2x8
C(>g4.-p8
h'vBWtMa
Common Lisp g&.OJ
(format t "Hello world!~%") NTCFmdbs 6
ZcHIk{|
t1yfSStp
DOS批处理 >@a7Zzl0H
@echo off 77+3CME{'
echo "Hello, world!" @x[A^
z.h;}QRJ,@
\j.l1O
Eiffel I^n,v )
8
class HELLO_WORLD JXt_
Ck
m:;q
creation f\RTO63|O
make "?iyvzo
feature K,PN:
make is -~_|ZnuM9
local y>T>
io:BASIC_IO s`v$r,N0
do Tgla_sMb
!!io MU '-
io.put_string("%N Hello, world!") {od@Sl
end -- make QWt3KW8)
end -- class HELLO_WORLD pnL[FMc
Ll#W:~
jWvi%Iqi
Erlang xd"+ &YT
-module(hello). N<Ym&$xR
-export([hello_world/0]). L0{[L
) 3f\H
hello_world() -> io:fwrite("Hello, World!\n"). w|0:0Rc~u
"HH<5M
!`W0;0'Zg
Forth #_IuB) qy
." Hello, world!" CR {+Wknm%
S
{+Z.P
el2<W=^M
Fortran k#/cdK!K
WRITE(*,10) /m^G 99N
10 FORMAT('Hello, World!') yVK l%GO
STOP GlC (uhCpV
END *<"{(sAvk
*p\fb7Pu_3
!4Sd ^"
HTML kf |J
<HTML> i]@k'2N
<HEAD> r%$\Na''
<TITLE> Hello World! </TITLE> #3RElI
</HEAD> (WY9EJ<s,
<BODY> COBjJ3
<p>Hello World!</p> /3sX>Rj
</BODY> '0o^T 7C
</HTML> 6rCUq
*]Cyc<
Rz&}e@stl
HQ9+ -Oz! GX
H >'WTVj `
{utnbtmu
WyM2h
INTERCAL ZnuRy:
PLEASE DO ,1 <- #13 d6??OO=~>M
DO ,1 SUB #1 <- #238 A9J{>f
DO ,1 SUB #2 <- #112 ]F;1 l3I-
DO ,1 SUB #3 <- #112 \F+".X#jh
DO ,1 SUB #4 <- #0 v:9'k~4)
DO ,1 SUB #5 <- #64 LN5q_ZvR
DO ,1 SUB #6 <- #238 ~6QV?j
DO ,1 SUB #7 <- #26 OJM2t`}_t
DO ,1 SUB #8 <- #248 9q[[
,R
DO ,1 SUB #9 <- #168 Are0Nj&?
DO ,1 SUB #10 <- #24 (wxi!
DO ,1 SUB #11 <- #16 n!Y}D:6c6
DO ,1 SUB #12 <- #158 _~P&8
DO ,1 SUB #13 <- #52 hKnV=Ha(
PLEASE READ OUT ,1 !tx.2m*5
PLEASE GIVE UP mjk<FXW
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ip*^eS^
Java 4/ q
BD
public class Hello Y~#F\v
{ ;'[?H0Jw'
public static void main(String[] args) `JGW8 _
{ %t74*cX
System.out.println("Hello, world!"); #~qzaETv,
} I1K %n'D
} F/:%YR;
$?[pcgv
)U]q{0`
JSP D)S_ p&
<% ;/IXw>O(/
out.print("Hello, world!"); VuK>lY&
%> 0r!F]Rm-^
pQ4HX)<P
~[BGKqh
MIXAL PB BJ.!Pb
TERM EQU 19 the MIX console device number '[_.mx|cd`
ORIG 1000 start address FBzsM7]j
START OUT MSG(TERM) output data at address MSG a6It1%a+
HLT halt execution MFWkJbZV
MSG ALF "MIXAL" y;P%=MP
ALF " HELL" 2$o\`^dy
ALF "O WOR" #P!M"_z
ALF "LD " m<*+^JN
END START end of the program !#e+!h@
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D})12qB;u9
Nuva \SYeDy
<..直接输出..> .>-D{
Hello, world! txX>zR*)
R -mn8N&
<..或者..> ^i3!1cS
|;p.!FO
<. 4gmlK,a
// 不带换行 8R(l~
? "Hello, world!" i;IhsKO0R
pm[i#V<v
// 或者 66_=bd(9
|X6R2I
// 带换行 iorQ/(
?? 'Hello, world!' <KoOJMx(
.> [W3sveqj&
e9QjRx
{QOy'
8/
OCaml Vk[M .=J
let main () = `v2Xp3o4f
print_endline "Hello world!";; qIh9? |`U
`ah"Q;d$
L[`8 :}M
Pascal Q;nC #cg
program Hello; K(Tej W#
begin :}gEt?TUhs
writeln('Hello, world!'); (FGHt/!
end. V<ilv<
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Y^8'P /A
Perl WU,b<PU &
#!/usr/local/bin/perl axN\ZXU
print "Hello, world!\n"; _[wG-W/9R
hVd_1|/X
8;f5;7Mn
PHP [O]rf+NZ(5
<?php #v6<9>%
print("Hello, world!"); u1.0-Y?
?> m6gMVon
r{Mn{1:O
gp'k(rGH
Pike )6o%6$c
#!/usr/local/bin/pike wuSotbc/
int main() {qCFd
{ t2m7Yh5B
write("Hello, world!\n"); .>1Y-NM
return 0; q [+KQ,
} .5 {<