“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。 c8{]]
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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》。 Q/ZkW
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以下是用不同语言写成的Hello World程序的几个例子: mf' ]O,
Ada dA_YL?or
with Ada.Text_Io; use Ada.Text_Io; @m~RtC-Q
procedure Hello is ?7jg(`Yh
begin !"Q}R p
Put_Line ("Hello, world!"); _n"Ae?TP
end Hello; fj>C@p
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汇编语言 &3Z?UhH
<*|?x86~
x86 CPU,DOS,TASM r[_4Lo@G
MODEL SMALL e8}Ezy"^
IDEAL MgJ36zM
STACK 100H BI2; ex
+Llo81j&
DATASEG 0:&ZnE}##
HW DB 'Hello, world!$' ~GJN@ka4%
?m0IehI
CODESEG [u
M-0t
MOV AX, @data }CDk9Xk
MOV DS, AX W0XF~
MOV DX, OFFSET HW Xf
d*D
MOV AH, 09H ,e`'4H
INT 21H ifK%6o6
MOV AX, 4C00H ~]'pY
INT 21H U7iuY~L
END I]nHbghcW
%O%=rUD
\}_Yd8
x86 CPU,GNU/Linux,NASM s
'?G H
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). .>pgU{C`!
;Enter this into "hello.asm" then type: uj|BQ`k
;"nasm -f elf hello.asm" ~u87H?
;"ld hello.o -o hello" [zkikZy
;"./hello" o.-C|IXG
|J0Q,F]T
section .data ;data section declaration k(%QIJH
msg db 'Hello World!',0AH G{9X)|d
len equ $-msg ;string length l4y{m#/
pS[KBQ"F
section .text ;code section declaration {/<6v. v
global _start ;entry point (start of execution) 7=XL!:P
_start: mov edx,len ;string length %7hB&[ 5
mov ecx,msg ;string start J*fBZ.NO
mov ebx,1 ;file handle: stdout ILwn&[A0
mov eax,4 ;sys_write otJ!UfpR8
int 80h ;kernel system call ($nrqAv4
~8T(>!hE1h
mov ebx,0 ;return value ,8MLoZ_
mov eax,1 ;sys_exit BZv+H=b
int 80h ;kernel system call v"^~&q0x
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L
x86 CPU,Windows,MASM32 ]bi)$j.9s
.386 1w(JEqY3h:
.model flat,stdcall xI*#(!x"G
option casemap:none DI|:p!Nx
;Include 文件定义 L,,*gK
include windows.inc ]aryV?!6
include user32.inc JUAS$Y
includelib user32.lib ~z5R{;Nbz|
include kernel32.inc 8>WVodv
includelib kernel32.lib fV:4#j
;数据段 D4JLtB'=
.data TXXy\$
szCaption db 'A MessageBox!',0 4Kwh?8.
szText db 'Hello,world!',0 WQNE2Q
;代码段 f:B>zp;N
.code _c$9eAe
start: '1^B+m
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK X^9d/}uTa
invoke ExitProcess,NULL fq[;%cr4
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> +>~?m*$
end start in`aGFQO
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G~7 i@Zs
AWK gb=/#G0R
BEGIN { print "Hello, world!" } <"D=6jqZ
P^`duZ{T
-u!FOD/
BASIC %M|,b!eF
传统版BASIC(例如GWBASIC): >>i@r@
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10 PRINT "Hello, world!" k67a'pmyJ
20 END P +"Y
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或在提示符输入: ph>7?3;t
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?"Hello, world!":END "P-lSF?T
)Or.;
现代版BASIC(例如Quick BASIC): :'F}Dy
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Print "Hello, world!" 0$+fkDf
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以下的语句在Quick BASIC中同样有效: 5 <wnva
mI*[>#q>
? "Hello,world!" oh"O07
65h @}9,U
{U<xdG
BCPL `U#55k9^5
GET "LIBHDR" Z+j\a5d?,
r;L>.wl*I
LET START () BE ^EG\iO2X
$( 7@lS.w\#-
WRITES ("Hello, world!*N") 3kcTE&1^
$) :c9U>1`g&
6
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:1XtvH
Befunge \)K^=jM
"!dlrow olleH">v DrnJ;Hi"
, m-^8W[r+_
^_@ Y)N-V
]5L
o&AM2U/?
ac kqH+'
Brainfuck P`s
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< -/{4Jf Wf
+++++++++++++++.>.+++.------.--------.>+.>. kr$b^"Ku
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-C(b,F%%
C 9% l%
#include <stdio.h> Yt|6
X:l
YEkh3FrbwH
int main(void) .<tquswg
{ { -|{xBd
printf("Hello, world!\n"); )X9W y!w0
return 0; MX4]Vpv
} b@3_L4~
.q&'&~!_
k+I}PuG
C++ !RyO\>:q
#include <iostream> \#o2\!@`
K=!Bh*
int main() fwK}/0%
{ (b'B%rFO
std::cout << "Hello, world!" << std::endl; p.+ho~sC,.
return 0; |#6QThK
} 3^s/bm$g
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1]orUF&_
C++/CLI 54
> -
int main() 7jnIv];i
{ %dQxJMwj
System::Console::WriteLine("Hello, world!"); +f*OliMD
} ^c:Fy+fb
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Z|%_oR~b|
C# (C Sharp) ;<G=M2
class HelloWorldApp T3`ludm^u
{ tmqY2.
public static void Main() 1x,[6H
{ aK`@6F,]j
System.Console.WriteLine("Hello, world!"); atXS-bg*
} Qs9gTBS;
} hstbz
~T) Q$
u,}{I}x_
COBOL ~ek$C
IDENTIFICATION DIVISION. z<B8mB
PROGRAM-ID. HELLO-WORLD. `--TP
A^q[N
ENVIRONMENT DIVISION. j"AU z)x
r}uz7}z %"
DATA DIVISION. rvr-XGK36\
3;%5Yu
PROCEDURE DIVISION. ^bEc6`eE
DISPLAY "Hello, world!". L%>n>w
STOP RUN. R(n^)^?
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ox+ 3U
Common Lisp <7-J0btV
(format t "Hello world!~%")
QtvY v!
[HCAmnb
+la2n(CAK
DOS批处理 pv&y91
@echo off
B<C*
echo "Hello, world!" KiJT!moB
O(+phRwJ
} :Z#}8
Eiffel H,N)4;F<c
class HELLO_WORLD =m5SK5vLKT
gn3jy^5
creation Nbp!teH6
make ?B:a|0pf
feature 'Ysx=
make is R'S0 zp6
local hAHq\
io:BASIC_IO 97ql5
do Z!U)I-x&
!!io F'hHK.tT
io.put_string("%N Hello, world!") 8T(e.I
end -- make y#XbJuN/
end -- class HELLO_WORLD }#X8@
It{ ;SKeo
[,TkFbDq"J
Erlang JwJ7=P=c
-module(hello). PssMTEf
-export([hello_world/0]). 7EXI6jGJ|
)c8j}
hello_world() -> io:fwrite("Hello, World!\n"). o tk}y8
/% kY0 LY
hUYd0qEbEt
Forth -%L6#4m4o
." Hello, world!" CR 1x[)/@.'f
}[M`uZ
:UQTEdc{
Fortran RIIitgV_
WRITE(*,10) g55`A`5%C
10 FORMAT('Hello, World!') h[PYP5{L
STOP }fKSqB]T-
END
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9'r:~O
R9B&dvG
HTML +"1NC\<*
<HTML> {l |E:>Q2
<HEAD> T8^5=/
<TITLE> Hello World! </TITLE> < P`u}
</HEAD> 4Z/f@ZD
<BODY> YX`7Hm,
<p>Hello World!</p> P{u0ftyX}
</BODY> '3?\K3S4i
</HTML>
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gCxAG
6C-z=s)P&
HQ9+ :rg5Kt&
H lg(bDKm
Uf, 4
{RF-sqce
INTERCAL $ibuWb"a
PLEASE DO ,1 <- #13 zD<or&6
DO ,1 SUB #1 <- #238 )HvnoUO0
DO ,1 SUB #2 <- #112 d'Zqaaf k%
DO ,1 SUB #3 <- #112 '7oA< R
DO ,1 SUB #4 <- #0 ,u/aT5\_
DO ,1 SUB #5 <- #64 xKFn.qFr
DO ,1 SUB #6 <- #238 7PkJ-JBA
DO ,1 SUB #7 <- #26 Y*!qG
DO ,1 SUB #8 <- #248 2z|*xS'G
DO ,1 SUB #9 <- #168 z(H^..<!5
DO ,1 SUB #10 <- #24 ^.>jGI%rB
DO ,1 SUB #11 <- #16 {6}eN|4~#
DO ,1 SUB #12 <- #158 `P9XqWr
DO ,1 SUB #13 <- #52 $H-!j%hV
PLEASE READ OUT ,1 0lv%`,
PLEASE GIVE UP ,dx3zBI
DoeiW=
4 M(-xl?
Java ="g*\s?r
public class Hello >Bgw}PI
{ aAB`G3
public static void main(String[] args) D#o}cC.
{ 'z[Sp~I\
System.out.println("Hello, world!"); PpgP&;z4
} rf$X>M=G
} +gLPhX:`
d.P\fPSD
tuhA
9}E
JSP |JVk&8
?8
<% V#`fs|e;y
out.print("Hello, world!"); qu-/"w<3$
%> +9")KQT
ph-ATJ"
)'4k|@8|
MIXAL @0SC"CqM
TERM EQU 19 the MIX console device number Ck!VV2U#
ORIG 1000 start address 1+U
START OUT MSG(TERM) output data at address MSG _C`K*u
6Z<
HLT halt execution `YIf_a{
MSG ALF "MIXAL" ~>+]%FPv
ALF " HELL" n;:rf 7hGY
ALF "O WOR" iV eC=^1
ALF "LD " 7__Q1>o
END START end of the program |lkNi
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H
`(exa:w
Nuva ]._LLSzWhg
<..直接输出..> n8DxB@DI
Hello, world! 1rDqa(7
y})70w@+_
<..或者..> w18y}mS"H
?A )hN8
<. /*c\qXA5
// 不带换行 'GL*u#h
? "Hello, world!" `8Lo {P
]TyisaT
// 或者 2[r^M'J
[Ts"OPb%~
// 带换行 hjQ~uqbg
?? 'Hello, world!' I*`* Q$
.> 8{Fsm;UsY
dH^ <t,v
,-OCc!7K
OCaml ~fo6*g:f1
let main () = xQ'2BAEa
print_endline "Hello world!";; 4sP2g&