“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。 N21smC}
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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》。 4+ig'
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以下是用不同语言写成的Hello World程序的几个例子: 2pAW9R#UV-
Ada I@3MO0V^
with Ada.Text_Io; use Ada.Text_Io; r*Xuj=
procedure Hello is SX*RP;vHy
begin OJxl<Q=z
Put_Line ("Hello, world!"); W>LR\]Ti@
end Hello; E'8;10s
7o4\oRGV
;G!q Y
汇编语言 Wjc'*QCPl
;Xw~D_uv
x86 CPU,DOS,TASM c%&>p||
MODEL SMALL `{Ul!
IDEAL \Cj B1]I
STACK 100H wS*E(IAl
+n)9Tz5
DATASEG N;gfbh]
HW DB 'Hello, world!$' j#6.Gq
0aAoV0fMDz
CODESEG :pUtSs7p}
MOV AX, @data Xeajxcop#
MOV DS, AX w(rE`IgW
MOV DX, OFFSET HW If.r5z9
MOV AH, 09H 7Ix973^
INT 21H Y0>y8UV
MOV AX, 4C00H 626r^c=
INT 21H .u:GjL'$
END 26nx`w?j(
ceV}WN19l
HV.t6@\};
x86 CPU,GNU/Linux,NASM 4z? l
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). A's{j7
;Enter this into "hello.asm" then type: 3u;oQ5<(v
;"nasm -f elf hello.asm" ys~x$
;"ld hello.o -o hello" OYd !v`<
;"./hello" "fI6Cpc
YMgNzu
section .data ;data section declaration JO;Uus{?
msg db 'Hello World!',0AH TN.rrop`#g
len equ $-msg ;string length ] @'!lhLi
}}[2SH'nH
section .text ;code section declaration Y}/-C3)
global _start ;entry point (start of execution) IU[ [H#
_start: mov edx,len ;string length xmG<]WF>E
mov ecx,msg ;string start ]q.0!lh+WL
mov ebx,1 ;file handle: stdout q@&6#B
mov eax,4 ;sys_write d@^ZSy>L2
int 80h ;kernel system call G"6 !{4g
+:f"Y0
mov ebx,0 ;return value $Y;RKe9
mov eax,1 ;sys_exit Gq6*SaTk
int 80h ;kernel system call 7"##]m.
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YV@"
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x86 CPU,Windows,MASM32 9z0p5)]n>
.386 j [a(#V{
.model flat,stdcall XkqCZHYkS
option casemap:none GeqPRah
;Include 文件定义 >7FHo-H/T
include windows.inc SKtr tm
include user32.inc /{[o~:'p
includelib user32.lib ZG:{[sT
include kernel32.inc R/_&m$ZB
includelib kernel32.lib FlQGgVN
;数据段 [m -bV$-d
.data =v\.h=~~
szCaption db 'A MessageBox!',0 lMt=|66
szText db 'Hello,world!',0 9$Y=orpWxr
;代码段 No$3"4wk
.code 9^x> 3Bo
start: <$YlH@;)`a
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK 5^cCY'I
invoke ExitProcess,NULL YQ}o?Q$z
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Q/?$x*\>
end start $j~RWfw-
}b}m3i1
g7|@
AWK b$7 +;I;
BEGIN { print "Hello, world!" } [WJ+h~~
o
'R)Tn!6
vI?, 47Hj+
BASIC F{wzB
传统版BASIC(例如GWBASIC): 7=uj2.J6
dQvcXl]
10 PRINT "Hello, world!" K:M8h{Ua
20 END K}y
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0J|3kY-n>
或在提示符输入: @iiT<
pCDmXB
?"Hello, world!":END jdN`mosJ
}vuARZ>
现代版BASIC(例如Quick BASIC): ;a/E42eN;
#Z #-Ht
Print "Hello, world!" o-\[,}T)M
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以下的语句在Quick BASIC中同样有效: Wqnc{oq|$
B~mj 8l4
? "Hello,world!" =I<R! ZSN
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kM6
Qp
BCPL [0of1eCSl
GET "LIBHDR" GyIV
Hby
x2EUr,7
LET START () BE H\
% 7%
$( "Q0@/bYq
WRITES ("Hello, world!*N") #WuBL_nZ~
$) txpgO1
wJ]d&::@h
Dv"9qk
Befunge :/#rZPPF
"!dlrow olleH">v Q8NX)R
, LLo;\WGZ
^_@ }EPY^VIw
r$1Qf}J3=
KXy6Eno
Brainfuck ixFi{_
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< +z( Lr=G
+++++++++++++++.>.+++.------.--------.>+.>. w(/S?d
M{@(G5
-"`=1l
C hrn+UL:d
#include <stdio.h> @- xjfC\d
bsX[UF
int main(void) QY/w
{ WY/}1X9.%
printf("Hello, world!\n"); L#J1b!D&<6
return 0; tc! #wd+u
} vt8By@]:
TxD#9]Q`
WMdg1J+~
C++ D^O@'zP=At
#include <iostream> NOva'qk
"[J^YKoF
int main() N['.BN
{ wj,=$RX
std::cout << "Hello, world!" << std::endl; kj_c%T
]/
return 0; <YY 14p
} Ytkv!]"
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fVlB=8DNk&
C++/CLI HtFDlvdy]
int main() C _Dn{
{ h0$iOE
System::Console::WriteLine("Hello, world!"); K-4PI+qQ\
} CZ;6@{ o
\D4:Nt#
F%|h;+5
C# (C Sharp) AH^/V}9H
class HelloWorldApp d0D]Q
{ &Jj<h: *
public static void Main() ;pAK_>
{ Y]>t[Lo%
System.Console.WriteLine("Hello, world!"); *w&e\i|7
}
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} Hs8>anVo[
A^g(k5M*
TOt dUO
COBOL
D7Z /H'|
IDENTIFICATION DIVISION. .Mbz3;i0
PROGRAM-ID. HELLO-WORLD. tw;}jh
)5,v!X)
ENVIRONMENT DIVISION. <I?Zk80
4Z*/WsCv
DATA DIVISION. :;}P*T*PU
4s-!7
PROCEDURE DIVISION. Y<OFsWYY
DISPLAY "Hello, world!". lxx2H1([
STOP RUN. C+$#y2"z#n
Ui~>SN>s
o-5TC
Common Lisp uRvP hkqm
(format t "Hello world!~%") o!Zb0/AP)
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01]f2.5
DOS批处理 ZK,G v
@echo off t.<i:#rj>l
echo "Hello, world!" }2jn[${ pr
teRTu
Q,g\
Eiffel r!v\"6:OM
class HELLO_WORLD ?,z}%p
Dt@SqX:~Ee
creation Q &8-\
make O.? JmE
feature f*Hr^b}`8
make is llq<egZpm
local 1MFbQs^
io:BASIC_IO 5P2K5,o|n~
do hN_]6,<\
!!io =;L|gtH"
io.put_string("%N Hello, world!") Rq -ZL{LR7
end -- make j 7B!h|
end -- class HELLO_WORLD 0GwR~Z}Z
F59 TZI
!
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X
Erlang NEs:},)o
-module(hello). P \I|,
-export([hello_world/0]). +A+)=/i;
kh<2BOV
hello_world() -> io:fwrite("Hello, World!\n"). h[ ZN+M
?6!LL5a.
e-;}366}
Forth [E_9V%^
." Hello, world!" CR A/(a`"mK|'
@ Qe0! (_=
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Fortran S:}7q2:
WRITE(*,10) l (o~-i\M
10 FORMAT('Hello, World!') st*gs-8jJ;
STOP z:O8Ls^\T
END XppOU
lZ0 =;I
`cO:<^%
HTML iU-j"&L5
<HTML> 7)m9"InDI
<HEAD> xno\s.H%]
<TITLE> Hello World! </TITLE> ICCc./l|
</HEAD> reVgqYp{{-
<BODY> ~[: 2I
<p>Hello World!</p> k)u[0}
</BODY> GbyJ:
</HTML> hZ3bVi)L\
g0H[*"hj
p_ =z#
HQ9+ 58K5ZZG
H k9R9Nz|J
llDJ@
GILfbNcd
INTERCAL $kgVa^
PLEASE DO ,1 <- #13 $e\M_hp*J
DO ,1 SUB #1 <- #238 q4q6c")zp
DO ,1 SUB #2 <- #112 wr4:Go`
DO ,1 SUB #3 <- #112 N [@?gFtT
DO ,1 SUB #4 <- #0 +p^u^a
DO ,1 SUB #5 <- #64 .hiSw
DO ,1 SUB #6 <- #238 YqG7h,F
DO ,1 SUB #7 <- #26 -M2yw
DO ,1 SUB #8 <- #248 p<2,=*2
DO ,1 SUB #9 <- #168 |}1dFp
DO ,1 SUB #10 <- #24 >p/`;Kq@
DO ,1 SUB #11 <- #16 Jwp7gYZ
DO ,1 SUB #12 <- #158 ^{{ qV
DO ,1 SUB #13 <- #52 (t.Nk[
PLEASE READ OUT ,1 X8|EHb<
PLEASE GIVE UP =xrv~
f)!Z~t &
H"KCK6
Java P4?glh q#
public class Hello iLz@5Zj8
{ .
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public static void main(String[] args) h~26WLf.
{ IB<d
System.out.println("Hello, world!"); :KN-F86i
} q;U,s)Uz^
} =EIkD9u
8f7>?BUS,
zJXplvaL;
JSP {[(h[MW#
<% s(^mZ
-i
out.print("Hello, world!"); .o8t+X'G
%> m68*y;#
':}\4j&{E
[2koe.?(
MIXAL *dF>_F
TERM EQU 19 the MIX console device number `kr?j:g
ORIG 1000 start address sr}E+qf
START OUT MSG(TERM) output data at address MSG W`&hp6Jq
HLT halt execution ,PZ ge
MSG ALF "MIXAL" qVPeB,kIz
ALF " HELL" 7rPF$ \#
ALF "O WOR" }i2V.tVB-
ALF "LD " ?}7p"3j'z
END START end of the program d"NLE'R
lLD12d
? q&T$8zc4
Nuva SB7c.H,
<..直接输出..> p8Q1-T3v
Hello, world! +*^H#|!
Df#l8YK#
<..或者..> 6^Sa;
uGt-l4
<. njw|JnDv
// 不带换行 akT6^cP^
? "Hello, world!" Fx+*S3==%e
kW (Bkuc)
// 或者 xKC[=E>z
D-4f.Tq4#
// 带换行 E"@wek.-
?? 'Hello, world!' j=J/x:w_e
.> Z8oK2Dw
5Ph4<f` L~
\L\b $4$d
OCaml *#Wdc O`-
let main () = T^v}mWCZ
print_endline "Hello world!";; )ANmIwmC#
4e1Y/
Xq`
`@
FYkH
Pascal :eg4z )
program Hello; 7yba04D)
begin 9S -9.mvop
writeln('Hello, world!'); B]$GSEB
end. $\! 7 {6a
)Z
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][]
Perl X|8c>_}
#!/usr/local/bin/perl 'eX '
print "Hello, world!\n"; #=v~8
/SrAW`;"
~= -RK$=
PHP B+0hzkPY
<?php |&[EZ+[
print("Hello, world!"); \j)E5b+
?> .}`Ix'.
0AV c
i@BtM9:
Pike ~WN:DXn
#!/usr/local/bin/pike Jq^T1_iqn
int main() L~>i,
{ ;ZG\p TCA
write("Hello, world!\n"); p[lA\@l[
return 0; fg{n(TE"8
} Rx|;=-8zg
pO.2<
6Kb1~jY
PL/I vI)LB)Q
Test: procedure options(main); H$KTo/
declare My_String char(20) varying initialize('Hello, world!'); R^e.s
-
put skip list(My_String); PJ'E/C)i
end Test; *
+wW(#[
C{XmVc.
I,'k>@w{s
Prolog O<;3M'y\
goal 63~
E#Dt4
write("hello,world!"). .k
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mo#04;VF
C=4Qlt[`
Python _H=Uwi_g
#!/usr/local/bin/python {&T_sw@[
print "Hello, world!" [=]4-q6UN
+XYE {E5
'-/xyAzS
REXX #`X?=/q
say "Hello, world!" KFkoS0M5|
QZ%`/\(!8_
X/M4!L}\
Ruby LAe6`foW/
#!/usr/bin/ruby kd$D 3S^{
print "Hello, world!\n" d6sye^P
A7hVHxNJ-
,$+V
Scheme :'&brp3ii=
(display "Hello, world!") r!a3\ep
(newline) a,#j =
L4|`;WP
c#tjp(-
sed (需要至少一行输入) Eue~Y+K*b
sed -ne '1s/.*/Hello, world!/p' yw3$2EW
FzXJ]H
~B(4qK1G
Smalltalk 8d-t|HkN
Transcript show: 'Hello, world!' ;K&o-y
JNUt$h
B=A [ymm
SNOBOL pDCeQ6?
OUTPUT = "Hello, world!" 3az&