“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。 _<)HFg6
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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》。 d5=yAn-+=
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以下是用不同语言写成的Hello World程序的几个例子: sDy~<$l?
Ada fydQaxCND
with Ada.Text_Io; use Ada.Text_Io; * \tR
procedure Hello is :-b-)*TC;
begin dQ Ao~]B
Put_Line ("Hello, world!"); PO0/C q)
end Hello; bB.Yq3KI
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汇编语言 7"k\i=
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x86 CPU,DOS,TASM o@|kq1m8
MODEL SMALL zvbz3 a
IDEAL )B Xl|V,
STACK 100H #U/L8
zXeBUbVi
DATASEG Eqt>_n8
HW DB 'Hello, world!$' ?D=%k8)Y
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CODESEG z%/<|`
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MOV AX, @data l8N5}!N
MOV DS, AX O u{|o0
MOV DX, OFFSET HW 4_vJ_H-mO,
MOV AH, 09H 8"x\kSMb
INT 21H /C[XC7^4'
MOV AX, 4C00H f.U.(
INT 21H BlfW~l'mx
END LQa1p
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x86 CPU,GNU/Linux,NASM M
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;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). qnU$Pd
;Enter this into "hello.asm" then type: 2rX}A3%9^^
;"nasm -f elf hello.asm"
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;"ld hello.o -o hello" is=|rY9$
;"./hello" 7o`pNcabtz
~bX ) %jC
section .data ;data section declaration {:BY
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msg db 'Hello World!',0AH ]hA]o7k
len equ $-msg ;string length Bd*\|M
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section .text ;code section declaration ;F>I+l_X
global _start ;entry point (start of execution) uWerC?da
_start: mov edx,len ;string length Z`bo1,6>
mov ecx,msg ;string start |#(g8ua7
mov ebx,1 ;file handle: stdout \E2S/1p
mov eax,4 ;sys_write cjBHczkY
int 80h ;kernel system call kpO+
<=!|U0YV
mov ebx,0 ;return value /pnQKy.
mov eax,1 ;sys_exit U7Pn
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int 80h ;kernel system call .1?7)k
v
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x86 CPU,Windows,MASM32 u=p-]?
.386 Jl^THoEL
.model flat,stdcall }WG -R
option casemap:none X+k`UM~
;Include 文件定义 vD4<G{
include windows.inc h}(GOYS)
include user32.inc >d#6qXKAU
includelib user32.lib p9$=."5
include kernel32.inc <\S
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includelib kernel32.lib t>>\U X
;数据段 x<e-%HB*-
.data AehkEN&H/t
szCaption db 'A MessageBox!',0 )VCRbz"[g
szText db 'Hello,world!',0 $5m_)]w4a
;代码段 " ^:$7~%bA
.code N?;5%pG
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start: 66~]7w
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK ]&/KAk
invoke ExitProcess,NULL A4uDuB;;ZQ
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> *Ad7GG1/u
end start 0^{?kg2o_
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BEGIN { print "Hello, world!" } vVi))%&S(
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BASIC R7 *ek_
传统版BASIC(例如GWBASIC): i\?P>:)
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10 PRINT "Hello, world!" 2x*C1
20 END =
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或在提示符输入: 8oj-5|ct
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?"Hello, world!":END :J}@*>c
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现代版BASIC(例如Quick BASIC): /U%Xs}A)
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Print "Hello, world!" 6A& f
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以下的语句在Quick BASIC中同样有效: Y(]&j`%
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? "Hello,world!" L_rKVoKjt
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BCPL THmX=K4=?
GET "LIBHDR" x6ig,N~AO
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LET START () BE ?)cNe:KY
$( $W8
WRITES ("Hello, world!*N") I/s?]v
$) P~0d'Oi
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8P 3EQY-
Befunge 9 0[gXj
"!dlrow olleH">v R?Q@)POW
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Brainfuck gtHk1 9
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+++++++++++++++.>.+++.------.--------.>+.>. |Js96>B:
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#include <stdio.h> 9`)NFy?
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int main(void) HFx8v!^5N
{ %t\`20-1<
printf("Hello, world!\n"); ~"5WQK`@
return 0; "$#x+|PyC
}
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C++ T.HI
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#include <iostream> HqU"iY>b
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int main() %.b)%=
{ D|Z,eench
std::cout << "Hello, world!" << std::endl; a7q-*%+d5
return 0; "31GC7
} \nx^=4*yk
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C++/CLI &^4W+I{H
int main() q!<`ci,uS
{ Vk$zA<sw"
System::Console::WriteLine("Hello, world!"); [8SW0wsk
} -NZj : N
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C# (C Sharp) H U$:x"AW
class HelloWorldApp ?i(Tc!
{ tZU"Ud
public static void Main() OV>T}Fq
{ *H&a_s/{Nb
System.Console.WriteLine("Hello, world!"); oRy?Dx+H
} rEdr8qw
} /43DR;4
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COBOL KL.{)bi
IDENTIFICATION DIVISION. n4k.tq
PROGRAM-ID. HELLO-WORLD.
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ENVIRONMENT DIVISION. DD|%F
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DATA DIVISION. \E?1bc{\f
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PROCEDURE DIVISION. XOgX0cRC4
DISPLAY "Hello, world!". N iNZh;
STOP RUN. Tr/wG
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Common Lisp A0O$B7ylQ
(format t "Hello world!~%") cKF02?)TX
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:XBeGNI*#
DOS批处理 vCbqZdy?
@echo off kZ`60X%wE
echo "Hello, world!" $hn_4$
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bMkn(_H)\
Eiffel )V)4N[?GC
class HELLO_WORLD evg i\"
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creation 4^70r9hV9
make u33+ ikYv
feature uA:;OM}
make is NO`a2HR$
local 4(u+YW GX
io:BASIC_IO 'n!;7*
do R\0]\JEc
!!io j*W]^uT,
io.put_string("%N Hello, world!")
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end -- make @U5+1Hjc
end -- class HELLO_WORLD cQgmRHZ]
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Erlang 4X#>;
-module(hello). OX|/yw8
-export([hello_world/0]). ]Z<{
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hello_world() -> io:fwrite("Hello, World!\n"). 2',t@< U
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Forth 'cH),~ z
." Hello, world!" CR Y/gVyQ(
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-BQM i0
Fortran v8 6ls[lzu
WRITE(*,10) "-ZuH
10 FORMAT('Hello, World!') \vFkhm
STOP Am kHVg
END m]7yc>uDy
/=m=i%& #
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HTML /Pg66H#RUf
<HTML> QdC>fy
<HEAD> X5>p~;[9
<TITLE> Hello World! </TITLE> gyI5;il~
</HEAD> ?F?!QrL
<BODY> +` Em&
<p>Hello World!</p> TO( =4;U
</BODY> dVO|q9 /
</HTML> J,{sRb%
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H ~(I\O?k>H
j24BB}mBB
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INTERCAL Ae`K9
PLEASE DO ,1 <- #13 !u\ X,.h
DO ,1 SUB #1 <- #238 !Otyu6&
DO ,1 SUB #2 <- #112 ZL1[Khr,s
DO ,1 SUB #3 <- #112 #@y4/JS&2
DO ,1 SUB #4 <- #0 <k<
DO ,1 SUB #5 <- #64 ?LvZEiJ
DO ,1 SUB #6 <- #238 h7*fjw-Xz[
DO ,1 SUB #7 <- #26 GbStqR~^#
DO ,1 SUB #8 <- #248 5^f>L2
DO ,1 SUB #9 <- #168 4\Q ?4ZX
DO ,1 SUB #10 <- #24 6PvV X*5T
DO ,1 SUB #11 <- #16 9.1%T06$
DO ,1 SUB #12 <- #158 GW`9SB
DO ,1 SUB #13 <- #52 %G\rL.H|
PLEASE READ OUT ,1 ;znIY&Z
PLEASE GIVE UP #W!@j"8eK
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Java ~p8-#A)X,)
public class Hello +s1mm c
{ Cd6^aFoK!
public static void main(String[] args) DFR.F:O%
{ fTV:QAa;
System.out.println("Hello, world!"); m./lrz
} ~{U~9v^v(
} _~5{l_v|I
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ETjlq]@j
JSP r+v*(Tu
<% I&R4.;LW
out.print("Hello, world!"); KQQR"[z&V
%> s?E7tmaM
vPSH
/-G;#Wm
MIXAL eNN% %Q
TERM EQU 19 the MIX console device number Ou8@7S
ORIG 1000 start address 'S@C,x%2,
START OUT MSG(TERM) output data at address MSG VJZ
HLT halt execution NaB8cLURp
MSG ALF "MIXAL" /e#_Yg
ALF " HELL" uK}k]x\z
ALF "O WOR" *vUKh^="
ALF "LD " q=UKL`;C}U
END START end of the program f:Ju20D
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Nuva T4o}5sq}S
<..直接输出..> 2$=?;~
Hello, world! C37KvLQ
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<..或者..> lj'c0k8
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<. @6}c\z@AxM
// 不带换行 URX>(Y}g9^
? "Hello, world!" Xk(c2s&
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// 或者 HrEZ]iQ@O0
x_bS-B)%Y:
// 带换行 ]0V~|<0c
?? 'Hello, world!' Gvl-q1PVC
.> K,?M5n '
h* h+VM
se2+X>@>
OCaml Pm7,Nq)<>n
let main () = :}o0Eb
print_endline "Hello world!";; {cq; SH
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Y'%sA~g
Pascal
VG q'
program Hello; kO~xE-(=
begin j}#48{
writeln('Hello, world!'); <