“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。 &Y?t
o& FOp'
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》。 rL1yq|]I
HvG %##
以下是用不同语言写成的Hello World程序的几个例子: u_$4xNmQ
Ada dEtjcId
with Ada.Text_Io; use Ada.Text_Io; 2$5">%?
procedure Hello is +FqD.= 8
begin ]"Uzn
Put_Line ("Hello, world!"); XLt/$Caf
end Hello; IS&qFi}W|W
AJ7^'p9Y
@!fUp
b
汇编语言 B#S8j18M
h'-4nu;*
x86 CPU,DOS,TASM 8C@u+tx
MODEL SMALL (Of6Ij?
IDEAL W+!UVUpW
STACK 100H AE}cHBwZE
o'$"MC+
DATASEG ]6^<VC`5D
HW DB 'Hello, world!$' {IJ;)<>&VE
"u7[[.P)
CODESEG \,G9'c 'u
MOV AX, @data 1 ;$XX#7o
MOV DS, AX hJ{u!:4
MOV DX, OFFSET HW N9_* {HOy
MOV AH, 09H =WT$\KYGv
INT 21H L T$U
z
MOV AX, 4C00H iibG$?(
INT 21H cDY)QUmi
END Sc[#]2 }
s)]j X
qX-ptsQ
x86 CPU,GNU/Linux,NASM tJ6@Ot
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). J;>epM;*
;Enter this into "hello.asm" then type: CVa>5vt
;"nasm -f elf hello.asm" d#0:U
Y% ~
;"ld hello.o -o hello" z9ADF(J?0'
;"./hello" ]@Zv94Z(
kP%hgZ
section .data ;data section declaration UA8hYWRP
msg db 'Hello World!',0AH Q
84t=
len equ $-msg ;string length (p%|F`
pz
/[${X
section .text ;code section declaration z)^|.
global _start ;entry point (start of execution) 2/*u$~
_start: mov edx,len ;string length ":udo VS!
mov ecx,msg ;string start fQa*> **j;
mov ebx,1 ;file handle: stdout JPqd}:u3
mov eax,4 ;sys_write Y.Zd_,qy
int 80h ;kernel system call |&= -Nm
2nkA%^tR
mov ebx,0 ;return value =tP9n ;D
mov eax,1 ;sys_exit T ?[28|
int 80h ;kernel system call h+1|.d
skcyLIb
`MSig)V
x86 CPU,Windows,MASM32 cuQ!"iH
.386 ?.VKVTX^
.model flat,stdcall 4[$:KGh3
option casemap:none _U^[h !
;Include 文件定义 }d?;kt
include windows.inc GJ*IH9YR
include user32.inc O% T?+1E
includelib user32.lib 1<BKTMBq?{
include kernel32.inc Dds-;9
includelib kernel32.lib xx`YBn~"
;数据段 *lSu=dk+
.data M
5sk&>
szCaption db 'A MessageBox!',0 h~ k<"
szText db 'Hello,world!',0 fmz"Zg9=
;代码段 \l:R]:w;ZI
.code <==uK>pET
start: :'DyZy2Fd
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK l/G+Xj4M
invoke ExitProcess,NULL dxs5woP
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> %VO+\L8Fs
end start s-"KABEE
_Z0 .c@0
[ey#
,&T
AWK `MI;.t
BEGIN { print "Hello, world!" } uB
I/3aQ
@njNP^'Kx
"u^Erj# /
BASIC 'v]0;~\mp>
传统版BASIC(例如GWBASIC): $NVVurXa
AZ3T#f![L@
10 PRINT "Hello, world!" .|O T#"LP
20 END '8;bc@cE
xvOz*vM?
或在提示符输入: uy
hh"[
;gZ
^c]\
?"Hello, world!":END U4!KO;Jc
xfb .Z(
现代版BASIC(例如Quick BASIC): G+<XYkz*
uBRlvNJ
Print "Hello, world!" +LRKS
:01d9|#
以下的语句在Quick BASIC中同样有效: ;mU;+~YE
EVqW(|Xg
? "Hello,world!" h< r(:.%!}
DJ"PP5d
,m#
BCPL 3lp'U&3`5
GET "LIBHDR" Lm4`O%
w.x&3aG
LET START () BE +|LM"
$( H4y9\
-
WRITES ("Hello, world!*N") ^N/d`IAjv
$) r ]7: ?ir
wo0j/4o
O^MI073Q>t
Befunge \t!~s^ Oox
"!dlrow olleH">v 9w=7A>.U
, r E m/Q!
^_@ ./F:]/Mt
/2?
CB\
[on_=N{W[
Brainfuck V5K/)\#
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< t%Jk3W/f
+++++++++++++++.>.+++.------.--------.>+.>. kGV:=h
MrR`jXz
i3w~&y-
C ^{uHph9ny
#include <stdio.h> QJ XP-
<<0sv9qw1
int main(void) \\k=N(n
{ <Z%=lwtX
printf("Hello, world!\n"); ,\6Vb*G|E>
return 0; 712nD ?>
} P2'N4?2
(mIjG)4t
R/oi6EKv
C++ j0e,>X8
#include <iostream> kkjugm{D7
E2dM0r<]
int main() ~$u9
{ }:2##<"\t
std::cout << "Hello, world!" << std::endl; ^m#tWb)f
return 0; KZ%i&w#<
} |]9@JdmV
T01Iu
{ U;yW)
C++/CLI x-[ItJ% l
int main() hS,&Nj+
{ 1sHjM%
System::Console::WriteLine("Hello, world!"); mXz*Gi
} $9`#p/V
uHKEt[PS$
*a Z1 4
C# (C Sharp) U823q-x
class HelloWorldApp M8~3 0L
{ FaeKDbLJr
public static void Main() 9vV==A#
{ vaB ql(?'2
System.Console.WriteLine("Hello, world!"); 4
.
7X*1
} F@?-^ E@
} hVF^"$
:IZAdlz[@
S"&Gutu3o
COBOL >`AK'K8{M
IDENTIFICATION DIVISION. ~2Wus8X-
PROGRAM-ID. HELLO-WORLD. #Nh'1@@
{'M<dI$
ENVIRONMENT DIVISION. -Rpra0o.
C
(I$%6JO:
DATA DIVISION. m#'eDO:
UQu6JkbLL
PROCEDURE DIVISION. UQDAql
DISPLAY "Hello, world!". MKfK9>a
STOP RUN. f8;?WSGyD2
}<^mUG
OInl?_,,T#
Common Lisp "SMJ:g",
(format t "Hello world!~%") t$$YiO
yP{ 52%|+
!Aj}sh{
DOS批处理 vxZ'-&;t
@echo off *:n7B\.
echo "Hello, world!" f]r*;YEc4
u
]"fwkL
67(s\
Eiffel ^.6yzlY
class HELLO_WORLD )g'J'_Sl
$eFMn$o
creation ;M.Q=#;E
make ?>B?*IK!
feature t"4* ]S
make is Mc,|C)
local O.+J%],
io:BASIC_IO y$%oR6K7-
do 7Y8~")f
!!io %C/p+Tg
io.put_string("%N Hello, world!") #%[;vK
end -- make on7
n4
end -- class HELLO_WORLD v":q_w<k
:6Nb,Hh~
],weqs
Erlang a<&K^M&
-module(hello). Oo
:Dt~Ib
-export([hello_world/0]). d3c.lD)L9
A&M_ J
hello_world() -> io:fwrite("Hello, World!\n"). `0qjaC
A1prYD
"kP,v&n
Forth a>OYJe
." Hello, world!" CR W/,bz",v3
1O`V_d)
DP@1to@
Fortran PgA<pfEHE
WRITE(*,10) ;}SGJ7
10 FORMAT('Hello, World!') `TPIc
STOP bh@Ct nO
END `-{l$Hn9|~
(?Mn_FNE|
{g.YGO
HTML &?R/6"J
<HTML> q=W.82.U
<HEAD> J:Fq i p
<TITLE> Hello World! </TITLE> !An?<Sv$
</HEAD> S
a+Y/
<BODY> F- -g?Q^
<p>Hello World!</p> $U?]^
</BODY> Zye04&x9k
</HTML> "Ol:ni1
zwV!6xG
>T]9.`xhK
HQ9+ 08xo_Oysq
H ?XY'<