“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。 #Al.Itj
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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》。 H/>86GG
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以下是用不同语言写成的Hello World程序的几个例子: =PiDZS^"
Ada cB
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with Ada.Text_Io; use Ada.Text_Io; Kd8V,teH
procedure Hello is bv`gjR
begin yjODa90!G
Put_Line ("Hello, world!"); W$7db%qFx
end Hello; q1sK:)Hu+
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woJO0hHR
汇编语言 #(C2KRRiA
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x86 CPU,DOS,TASM "ZDc$v:Qa
MODEL SMALL 0x!XE|7I
IDEAL jW5n^Y)
STACK 100H t>QAM6[
+2!J 3{[J
DATASEG E(A7D XzbR
HW DB 'Hello, world!$' |e@9YDZ
Tx%6whd/'
CODESEG 2mAXBqdm
MOV AX, @data 'awL!P--
MOV DS, AX mHjds77e
MOV DX, OFFSET HW )=TD}Xb
MOV AH, 09H @^oOXc,r$
INT 21H l$D]*_ jc,
MOV AX, 4C00H (#FWA<o
INT 21H 6Clxe Lk
END B`)o?GcVN
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x86 CPU,GNU/Linux,NASM 8MgoAX,p
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). _7>$'V{
;Enter this into "hello.asm" then type: f^il|Obzl
;"nasm -f elf hello.asm" hko0
?z
;"ld hello.o -o hello" az@{O4
;"./hello" 0qXd?z$
!_rAAY
section .data ;data section declaration [=079UN-X
msg db 'Hello World!',0AH a9PSg/p
len equ $-msg ;string length _?&$@c
4jefU}e9#
section .text ;code section declaration ZKTOif}
global _start ;entry point (start of execution) UA$
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_start: mov edx,len ;string length So?SBh1C
mov ecx,msg ;string start |>a sGP
mov ebx,1 ;file handle: stdout $wUFHEl
mov eax,4 ;sys_write (yWU9q)5
int 80h ;kernel system call GFasGHAw
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mov ebx,0 ;return value [_6_A O(Z
mov eax,1 ;sys_exit Ijq1ns_tx8
int 80h ;kernel system call UR6.zE4=_
,<n >g;
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x86 CPU,Windows,MASM32 YIo$
.386 z><=F,W
.model flat,stdcall =zBcfFii`w
option casemap:none 6}"P m
;Include 文件定义 !a?$
include windows.inc o@j]yA.5)
include user32.inc (3YCe {
includelib user32.lib xWlj.Tjt}
include kernel32.inc "']I.
includelib kernel32.lib FI++A`
;数据段 S05+G}[$
.data BYuF$[3ya&
szCaption db 'A MessageBox!',0 `oP :F[B
szText db 'Hello,world!',0 ?#"rI6
;代码段 L
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.code |f1 S&b.
start: WGFp<R
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK {pMbkAQ@
invoke ExitProcess,NULL hI*gw3V
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> @~%R%Vu
end start 9,\b$?9
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~ *RG|4#
AWK Br.$:g#
BEGIN { print "Hello, world!" } B}_*0D
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BASIC cjfYE]
传统版BASIC(例如GWBASIC): n{JBC%^g
M72.
10 PRINT "Hello, world!" asqbLtQ
20 END _4F(WC co
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或在提示符输入: c?B@XIl
f tW-
?"Hello, world!":END $Kgw6
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现代版BASIC(例如Quick BASIC): rC.z772y%
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Print "Hello, world!" I$!rNfrs
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以下的语句在Quick BASIC中同样有效: 7l}P!xa&
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? "Hello,world!" ZGgKCCt
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BCPL xtWQ.
GET "LIBHDR" &}:'YK*X
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LET START () BE o))z8n?b
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WRITES ("Hello, world!*N") /H.w0fu&.S
$) 94 58.!3
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Befunge c,nE@~ul2
"!dlrow olleH">v Hx[YHu
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, ax$ashFO/!
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%%n'xmm
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Brainfuck <[mT*
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+++++++++++++++.>.+++.------.--------.>+.>. iJ n<
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C !5I;3EN
#include <stdio.h> q5C(/@)^
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int main(void) |Iei!jm
{ x=>B 6o-f
printf("Hello, world!\n"); qv\n]M_&
return 0; Er/h:=
} B].V|8h
kN (*.Q|VZ
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C++ ~ 8L]!OQ9=
#include <iostream> T
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int main() (jb9U k_t
{ D5lzrpg _e
std::cout << "Hello, world!" << std::endl; dqF]kP,VG
return 0; IoO t n
} BfZAK0+*$
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C++/CLI ]}7FTMGbY
int main() ipzv]c&
{ N{oi }i6
System::Console::WriteLine("Hello, world!"); ~[n]la
} ;
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C# (C Sharp) B(tLV9B3Q
class HelloWorldApp C\"nlNKw
{ `pr$l
public static void Main() 7#/->Y
{ U9w0kcUw#J
System.Console.WriteLine("Hello, world!"); #r5IwyL
} (gW#T\Eln
} t~vOm
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COBOL =' %r"_`}
IDENTIFICATION DIVISION. P5$d#Y(=
PROGRAM-ID. HELLO-WORLD. 0
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fny|^F]w
ENVIRONMENT DIVISION. BK>3rjXi>a
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DATA DIVISION. B=dF\.&Z
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PROCEDURE DIVISION. HURrk~[
DISPLAY "Hello, world!". iCd$gwA>F
STOP RUN. ^a+W!
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r?cDyQE
Common Lisp _0HCtx ;
(format t "Hello world!~%") R1'tW=
scr`] tD
pO]{Y?X:
DOS批处理 %[3?vX
@echo off HC1jN8WDY
echo "Hello, world!" 2ed4xhV
/%qw-v9qPV
E2.@zY|:
Eiffel
HJ5 Ktt
class HELLO_WORLD KD TG9KC
!97U2L4
creation ^YVd^<cE
make 'v|R' wi\
feature ?a)X)#lQ
make is W=QT-4
local r.-U=ql
io:BASIC_IO UXs=7H".
do v67utISNI
!!io j%w}hGW%,
io.put_string("%N Hello, world!") k@}?!V*l
end -- make Evjvaa^
end -- class HELLO_WORLD |[6jf!F
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Erlang Q4~/Tl;
-module(hello). [Eq7!_3
-export([hello_world/0]). KImBQ2 ^Tu
K!AW8FnHkZ
hello_world() -> io:fwrite("Hello, World!\n"). 8]G
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!V%h0OE\
Forth whH_<@!
." Hello, world!" CR JXT%@w>I
tccw0
,=Q;@Z4 vJ
Fortran V1yY>
WRITE(*,10) yM_ta '^$
10 FORMAT('Hello, World!') .$ o0$`}
STOP %R?B=W7;Q
END &-5`Oln
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HTML QaVxP1V#U
<HTML> !'
}
<HEAD> Fa"/p_1
<TITLE> Hello World! </TITLE> _%r +?I
</HEAD> c@|!0
U%j
<BODY> O {hM
<p>Hello World!</p> S*aMUV&
</BODY> \r.{Ru
</HTML> 9`a1xnL
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N}|<P[LW
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H NA :_yA"
/m"#uC!\
~]w|ULNa3|
INTERCAL _ ^2\/@
PLEASE DO ,1 <- #13 bUcEQGHcZ=
DO ,1 SUB #1 <- #238 bU3P;a(
DO ,1 SUB #2 <- #112 ,ORwMZtw{H
DO ,1 SUB #3 <- #112 ;nSOeAF)Q
DO ,1 SUB #4 <- #0 .
X:
DO ,1 SUB #5 <- #64 *A^`[_y
DO ,1 SUB #6 <- #238 T'W@fif
DO ,1 SUB #7 <- #26 Bd++G'FZ
DO ,1 SUB #8 <- #248 t^k^e{,q#
DO ,1 SUB #9 <- #168 z~m{'O`
DO ,1 SUB #10 <- #24 Q
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DO ,1 SUB #11 <- #16 l* ap$1'
DO ,1 SUB #12 <- #158 g+RgDt9
DO ,1 SUB #13 <- #52 ^CBc~um2
PLEASE READ OUT ,1 /W|=Or2oR
PLEASE GIVE UP TA9Kg=_
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Java Yl$R$u)
public class Hello
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{ H{d;,KfX
public static void main(String[] args) vvi[+$M
{ @$*LU:[
System.out.println("Hello, world!"); &s{" Vc9]
} yIq.
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} 7{BTtUMAC
&^7^7:Y=?
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JSP prdc}~J8{
<% RV_(T+
out.print("Hello, world!"); %U
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%> _\ &