“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。 Q+y-*1
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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》。
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以下是用不同语言写成的Hello World程序的几个例子: ?vL^:f["
Ada @@&@}IQcR1
with Ada.Text_Io; use Ada.Text_Io; j:de}!wc
procedure Hello is &\WkJ}&PnA
begin n{qa ]3
Put_Line ("Hello, world!"); "R\\\I7u
end Hello; ^Yf)lV&[
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汇编语言 Q9 x` Uy
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x86 CPU,DOS,TASM jiw`i
MODEL SMALL R"8})a
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IDEAL ~,`\D7Z3
STACK 100H YDZ1@N}^B
L&3Ar'
DATASEG !)51v {
HW DB 'Hello, world!$' W~+!"^<n
g[D,\
CODESEG VQG /g\
MOV AX, @data q6m87O9
MOV DS, AX pO 7{3%
MOV DX, OFFSET HW 4/mj"PBKL
MOV AH, 09H f4aD0.K.g|
INT 21H /%}YuN
MOV AX, 4C00H Xx9~
INT 21H =E6i1x%j
END yoQ?lh
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,Rr&.
x86 CPU,GNU/Linux,NASM }ii]cY
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). [w#x5Xsn
;Enter this into "hello.asm" then type: dTU.XgX)1^
;"nasm -f elf hello.asm" k{u%p <
;"ld hello.o -o hello" ](
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;"./hello" ?[L0LL?ce
{ZBb.$}RC
section .data ;data section declaration yW6[Fpw
msg db 'Hello World!',0AH a s<q
len equ $-msg ;string length Lu#@~
/KJx n6
section .text ;code section declaration MR l*rK
global _start ;entry point (start of execution) Ik@Q@ T"
_start: mov edx,len ;string length gYH:EuY,
mov ecx,msg ;string start vI:bl~
mov ebx,1 ;file handle: stdout ,{mf+ 3&$,
mov eax,4 ;sys_write w3]0
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int 80h ;kernel system call u_/OTy
'mY,>#sT
mov ebx,0 ;return value q%=7<( w
mov eax,1 ;sys_exit Q,M/R6i-
int 80h ;kernel system call W)Kpnb7
#9W5
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x86 CPU,Windows,MASM32 .o,51dn+ s
.386 ekk&TTp#
.model flat,stdcall MkV*+LXC
option casemap:none GWkJ/EX
;Include 文件定义
"ppb%=
include windows.inc o4I!VK(C#s
include user32.inc fb=$<0Ocj
includelib user32.lib PB3!;
include kernel32.inc <K.C?M(9
includelib kernel32.lib ZZ.0'
;数据段 krnk%ug
.data G~$M"@Q7N
szCaption db 'A MessageBox!',0 5KPPZmO
szText db 'Hello,world!',0 ;(iUY/ h[h
;代码段 ^$s~qQQ}B
.code W0?Y%Da(4m
start: 51(`wo>LS
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK B6!<@*BI
invoke ExitProcess,NULL IkXKt8`YVA
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> F*jjcUk
end start '>WuukC
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AWK |9i/)LRXe
BEGIN { print "Hello, world!" } qu~"C,
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BASIC s"Pk-Dv
传统版BASIC(例如GWBASIC): ,tv9+n@x
Ai_|)
10 PRINT "Hello, world!" Qc
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20 END 8!fAv$g0
A
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或在提示符输入: @.]K6qC
",
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?"Hello, world!":END MKhL^c-
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现代版BASIC(例如Quick BASIC): ]B.,7
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Print "Hello, world!" "E[*rnsLN
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以下的语句在Quick BASIC中同样有效: I8oKa$RF
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? "Hello,world!" '*{Rn7B5
u9~V2>r\
wTAEJ{p
BCPL xp;8p94
GET "LIBHDR" iqKfMoy5
Wes"t}[25
LET START () BE SVEA
$( lG^nT
WRITES ("Hello, world!*N") wNZS6JF.d
$) ]~x/8%e76
D2*Q1n
\]:NOmI^'
Befunge ghd[G}
"!dlrow olleH">v j
tkPi)QR
, Ty`=U>K|
^_@ ~322dG
Q_h+r!b
(=/L#Yg_
Brainfuck ScmzbDu
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< `0vy+T5
+++++++++++++++.>.+++.------.--------.>+.>. KdQ|$t
FbNQ
^WYG?/{4
C EjCzou
#include <stdio.h> 2
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int main(void) 4)Wzj4qW
{ 0+`*8G)
printf("Hello, world!\n"); !F s)"?
return 0; 91Sb=9
} <u%e*
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C++ ZaV66Y>
#include <iostream> lSv;wwEg
n{NgtH\V
int main() @{GxQzo
{ Gkvd{G?F
std::cout << "Hello, world!" << std::endl; >-WOw
return 0; %iFIY=W
} eeR@p$4i
>!.lr9(l
(zODV4,5k`
C++/CLI |y=F (6Z
int main() ba:^zO^
{ (j
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System::Console::WriteLine("Hello, world!"); o:\j/+]
} s|`)'
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C# (C Sharp) n&&U9sf?
class HelloWorldApp 6? ly.h$
{ 5Jd {Ev
public static void Main() W
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{ m&c(N
System.Console.WriteLine("Hello, world!"); 4gt "dfy+
} ON!G{=7
} l'8wPmy%N
i_^NbC
I`>%2mP[C
COBOL D??/=`|8
IDENTIFICATION DIVISION. dp W%LXM_
PROGRAM-ID. HELLO-WORLD. UC$+&&rO
n,LKkOG
ENVIRONMENT DIVISION. ]KT,s].
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DATA DIVISION. eV}Tx;1|}
RxG./GY
PROCEDURE DIVISION. nECf2>Yp v
DISPLAY "Hello, world!". N2Hb19/k
STOP RUN. t O;W?g
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1G=P
PX/0 jv
Common Lisp ?2>v5p
(format t "Hello world!~%") 5!p'n#_
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I"?&X4%e
DOS批处理 >&z+ih
@echo off (19<8a9G
echo "Hello, world!" u6d~d\
4=cq 76
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Eiffel .?]_yX
class HELLO_WORLD /hR]aw
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creation ixpG[8s
make 2 -8:qmP(
feature fbkjK`_q
make is "b7C0NE
local {Oszq(A
io:BASIC_IO z9w.=[Io
do xK 'IsMo[
!!io 2a-hf|b1
io.put_string("%N Hello, world!") =LA@E&,j
end -- make yt,;^o^
end -- class HELLO_WORLD fdHxrH>*
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Erlang 3f8Z?[Bb@
-module(hello). d69VgLg
-export([hello_world/0]). i|'t!3I^m
Wbxksh:)Q
hello_world() -> io:fwrite("Hello, World!\n"). ZK*aVYnu
y$NG ..S
4tTJE<y
Forth z|H>jit+
." Hello, world!" CR h]9^bX__Z
&|] ^ u/
^q2zqC
Fortran ywte\}
WRITE(*,10) ZeV)/g,w
10 FORMAT('Hello, World!') P://Zi6>
STOP S45_-aE
END ,BAF?}04=
L,L7WObA
@kymL8"2w
HTML X:/t>0e
<HTML> P2F>iK#U
<HEAD> net9KX4\
<TITLE> Hello World! </TITLE> px@\b]/
</HEAD> < Ifnf6~
<BODY> (0f^Hh wF
<p>Hello World!</p> iq-o$6Pg
</BODY> ?>&Zm$5V
</HTML> s6uAF(4,
Cn '=_1p
1YL5 ![T
HQ9+ bux-t3g7+
H 8?XZF[D
X.<R['U&\
l[ k$O$jo
INTERCAL :B~c>:
PLEASE DO ,1 <- #13 '"^JNb^I
DO ,1 SUB #1 <- #238 CXZeL 1+
DO ,1 SUB #2 <- #112 !f6
DO ,1 SUB #3 <- #112 :DJ@HY
DO ,1 SUB #4 <- #0 w4a7c
DO ,1 SUB #5 <- #64 5;Xrf=
DO ,1 SUB #6 <- #238 *E'K{?-K
DO ,1 SUB #7 <- #26 wt;aO_l
DO ,1 SUB #8 <- #248 W[s>TDc`v
DO ,1 SUB #9 <- #168 EM}z-@A>
DO ,1 SUB #10 <- #24 5{Wl(jwb
DO ,1 SUB #11 <- #16 RkzBn
DO ,1 SUB #12 <- #158 1O4"MeF
DO ,1 SUB #13 <- #52 0
HmRl
PLEASE READ OUT ,1 ,vPF=wq
PLEASE GIVE UP 3FN? CN] O
3LREue7Gr
RSC-+c6 1
Java _(foJRr
public class Hello s=4.Ovd\
{ +&@0;zSga
public static void main(String[] args) UEUTu}4y
{ eHR<(8c'f
System.out.println("Hello, world!"); pJ[Q.QxU
} A$cbH.
} h;->i]
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"Cb<~Dy
JSP 6tguy
<% c^y 1s*
out.print("Hello, world!"); R8l9i2
%> xJCpWU3wM
xTT>3Fj
CCV~nf
MIXAL Rd)QVEk>SD
TERM EQU 19 the MIX console device number tUQ)q
ORIG 1000 start address CggEAi~
START OUT MSG(TERM) output data at address MSG O;2 u1p'iP
HLT halt execution b3+PC$z2h
MSG ALF "MIXAL" S6]':
ALF " HELL" tS$Ne7yk e
ALF "O WOR" 4KCxhJq
ALF "LD " L@XeAEIq
END START end of the program e=2D^G#qE
F*f)Dv$p
q@:&^CS
Nuva LxT ]-
<..直接输出..> KXJHb{?
Hello, world! k&b>-QP6
}8HLyK,4
<..或者..> i7FEjjGtG
:z\STXq
<. P*>V6SK>b
// 不带换行 ioggD
? "Hello, world!" Tx*m
p+q
#82B`y<<y/
// 或者 hlRE\YO&8R
DN+`Q{KS
// 带换行 Ju<D7
?? 'Hello, world!' AN@Vos
Cu
.> jJ|;Nwm<[
^ ;a[v^&9
iwbjjQPr
OCaml V~;YV]1Y
let main () = S4w/
kml3
print_endline "Hello world!";; \
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H<
j+-u4b
t(Uoi~#[
Pascal &+v&Dd&
program Hello; +-hmITJv
begin Fr~xN!
writeln('Hello, world!'); DjIs"5Iei
end. x>^S..K}L%
Y*Pr
8/:\iPk0
Perl VI?[8@*Z
#!/usr/local/bin/perl "q$M\jK#V
print "Hello, world!\n"; X_lNnk
zF PSk]
/?sV\shy
PHP [#:k3aFz
<?php Ev%\YI!MaY
print("Hello, world!"); <