“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。 3TUW+#[Gu
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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》。 7sP;+G
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以下是用不同语言写成的Hello World程序的几个例子: we'<Y
Ada nQ|4.e;
with Ada.Text_Io; use Ada.Text_Io; F) w.q
procedure Hello is a*LT <N
begin (vte8uQe
Put_Line ("Hello, world!"); csn/h$`-@
end Hello; ;>^oe:@
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汇编语言 kPwgayz
#_yQv? J
x86 CPU,DOS,TASM .qVz rS
MODEL SMALL (Wkli:Lq
IDEAL Xx{ho4qq
STACK 100H rkhQoYZ[
=`2nv0%2
DATASEG {MmHR
HW DB 'Hello, world!$' 1);$#Dlt
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CODESEG `(A6uakd
MOV AX, @data 8@%Xd^
MOV DS, AX M=[ /v/M=
MOV DX, OFFSET HW j]7|5mC78
MOV AH, 09H @rs(`4QEh
INT 21H KDwz!:ye
MOV AX, 4C00H \8\)5#?
INT 21H Hj
]$
END A^7!:^%K
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Ore$yI}!m
x86 CPU,GNU/Linux,NASM kg[u@LgvoN
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). y e!Bfz>
;Enter this into "hello.asm" then type: Li ,B,
;"nasm -f elf hello.asm" ~ZU;0#
;"ld hello.o -o hello" 9fD4xkRS
;"./hello" "^-U#f>k
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section .data ;data section declaration Du3OmXMk
msg db 'Hello World!',0AH `}o4 &$
len equ $-msg ;string length }GvoQ#N
$mm =$.
section .text ;code section declaration xO'I*)
global _start ;entry point (start of execution) !-
f>*|@
_start: mov edx,len ;string length E
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mov ecx,msg ;string start Q0~5h?V'
mov ebx,1 ;file handle: stdout /H.QGPr
mov eax,4 ;sys_write PJj{5,#@3
int 80h ;kernel system call *ggTTHy
/uI/8>p(
mov ebx,0 ;return value Cw?AP6f%
mov eax,1 ;sys_exit Okk[}G)
int 80h ;kernel system call {frEVHw
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x86 CPU,Windows,MASM32 >_M}l@1
.386 vl$! To9R"
.model flat,stdcall mFayU w
option casemap:none mm$D1=h{|
;Include 文件定义 ';V(sRU@
include windows.inc o^~6RZ
include user32.inc hM
E|=\
includelib user32.lib VL5kjF3/
include kernel32.inc A{h
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includelib kernel32.lib #%VprcEK
;数据段 L*tXy>&b.
.data Qpd-uC_Ni
szCaption db 'A MessageBox!',0 Lhl)p P17
szText db 'Hello,world!',0 rP ;~<IxEr
;代码段 d;S:<]l'
.code ]Oc
:x
start: +C;ZO6%w
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK .Q"3[
invoke ExitProcess,NULL pALB[;9g
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> E E?v~6"&
end start cYx=8~-
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;TSnIC)c
AWK X2@mQ&n
BEGIN { print "Hello, world!" } 4\pA^%73
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BASIC ZC"6B(d
传统版BASIC(例如GWBASIC): PB>p"[ap4
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10 PRINT "Hello, world!" 6AUzS4O
20 END '5ky<
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或在提示符输入: ]&/jvA=\l,
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?"Hello, world!":END $pk3d+0B
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现代版BASIC(例如Quick BASIC): `RGZ-Q{_
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Print "Hello, world!" 8g>jz
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以下的语句在Quick BASIC中同样有效: TeqFy( Dr
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? "Hello,world!" Byldt
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BCPL a]X6) 6
GET "LIBHDR" !c6lP'U
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LET START () BE ac+7D:X
$( ls*^3^O
WRITES ("Hello, world!*N") o\|dm."f
$) asQ" |]m
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Befunge }$qy_Esl
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C T$}<So|
#include <stdio.h> VKN^gz
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int main(void) uN$X3Ls_
{ uL-i>!"L!}
printf("Hello, world!\n"); =z=Guvcn`
return 0; |;D[Al5AMc
} i}wu+<Mk
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up:e0di{
C++ .mok.f<G_m
#include <iostream> /AMtT%91
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int main() M/1Q/;0P
{ 8|d[45*q
std::cout << "Hello, world!" << std::endl; HvTi^Fb\a
return 0; bM-Y4[
} CS"p[-0
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C++/CLI .Zwn{SMtu
int main() p O:
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{ +i)1 jX<
System::Console::WriteLine("Hello, world!"); {Ua5bSbh
} ZnJnjW PQ
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C# (C Sharp) 0\h2&
class HelloWorldApp wPc,FH+y
{ hG
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public static void Main() (>8fcQUBb
{ Jx{,x-I
System.Console.WriteLine("Hello, world!"); o<g (%ncr
} +6;OB@
} 94a_ W9
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COBOL { j/w3
IDENTIFICATION DIVISION. ?&X6VNbU
PROGRAM-ID. HELLO-WORLD. #JW1JCT
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ENVIRONMENT DIVISION. ~P/G^cV3s
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DATA DIVISION. QWxQD'L'
5S7Z]DXiT8
PROCEDURE DIVISION. []Fy[G.)H
DISPLAY "Hello, world!". |
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STOP RUN. |BW956fBU
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Common Lisp -!}1{
(format t "Hello world!~%") a%]p*X!
!l\pwfXP&%
brVT
DOS批处理 HwGtLeB"
@echo off 9rid98~d
echo "Hello, world!" pTN_6=Y"
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h]=chz
Eiffel P#0_
class HELLO_WORLD C4G)anT
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creation }.hBmhnZmI
make *CG2sAeB
feature dKMuo'H'%
make is Wu}Co
local mrbIoN==`
io:BASIC_IO dqkkA/1
do >2|#b
!!io F?dTCa
io.put_string("%N Hello, world!") k]JLk"K
end -- make Q\rqG
end -- class HELLO_WORLD i3~!ofTb
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lfKknp#B/O
Erlang ZD<,h`
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-module(hello). tyDtwV|
-export([hello_world/0]). 4H,DG`[Mo
0N}5sF
hello_world() -> io:fwrite("Hello, World!\n"). m=K XMX
Kzm_AHA)
=#u2Rx%V
Forth z~BB|-kp1
." Hello, world!" CR 7q?YdAUz
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c`>\R<Z ]
Fortran CxRp$;rk
WRITE(*,10) AVJk
10 FORMAT('Hello, World!') s%:fB(
STOP =UV?Pi*M>
END zZxP=
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