“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。 TU4"7]/{M
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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》。 j:# wt70
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以下是用不同语言写成的Hello World程序的几个例子: V9*Z
Ada VMPBM:kG
with Ada.Text_Io; use Ada.Text_Io; ?IR]y-r
procedure Hello is ,U+y)w]ar
begin /E F0~iy
Put_Line ("Hello, world!"); SFVOof#s
end Hello; ~Rd,jfx
3 f=_F
.UF](
汇编语言 BbEWa
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x86 CPU,DOS,TASM T
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MODEL SMALL FES_:?.0
IDEAL Q>Rjv.1
STACK 100H m~cz
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DATASEG o$]wd*+
HW DB 'Hello, world!$' (_h<<`@B
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CODESEG )[&'\SOO
MOV AX, @data ocCq$%Ka
MOV DS, AX qPeaSv]W
MOV DX, OFFSET HW fYrC;&n
MOV AH, 09H @X@?jj&
INT 21H Y;$wD9W
MOV AX, 4C00H {"T$jV:GB
INT 21H tHAr9
END P;_}nbB
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x86 CPU,GNU/Linux,NASM $+CKy>
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). hTZ&
;Enter this into "hello.asm" then type: Lc.=CBQ
;"nasm -f elf hello.asm" 0
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;"ld hello.o -o hello" S B2R
;"./hello" Fk(nf9M%
_L}k.
section .data ;data section declaration KY5 it9e
msg db 'Hello World!',0AH `@%hz%8Y
len equ $-msg ;string length "Sm'TZx
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section .text ;code section declaration {nvF>
global _start ;entry point (start of execution) ctI=|K
_start: mov edx,len ;string length \*x'7c/qg
mov ecx,msg ;string start rCt8Q&mzf
mov ebx,1 ;file handle: stdout i\~@2
mov eax,4 ;sys_write NWnUXR
int 80h ;kernel system call Er /:iO)_
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mov ebx,0 ;return value J @eu]?h
mov eax,1 ;sys_exit F/gA[Y|,gI
int 80h ;kernel system call Kvx~2ZMx6
.nDB{@#
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x86 CPU,Windows,MASM32 t}FwS6u
.386 =PU!hZj"L
.model flat,stdcall `sW+R=
option casemap:none zt&"K0X|
;Include 文件定义 /e|vz^#+1,
include windows.inc X5[.X()M4
include user32.inc v\&C]W]
includelib user32.lib "[A]tklP
include kernel32.inc ^j~CYzmt
includelib kernel32.lib =CBY_
;数据段 MZJ@qIg[Y
.data v_U+wga
szCaption db 'A MessageBox!',0 i'bviD
szText db 'Hello,world!',0 'uy\vR&Pz
;代码段 ?2d! ^!9
.code Z`jc*jgy
start: $2!|e,x
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK ;t6)(d4z?
invoke ExitProcess,NULL :pz`bFJk
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> N{b;kiZq
end start M3m)ui z
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BEGIN { print "Hello, world!" } "~V|p3
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BASIC prypo.RI
传统版BASIC(例如GWBASIC): q>X30g
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10 PRINT "Hello, world!" z5njblUz
20 END KOv?p@d
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或在提示符输入: P5?M"j0/^
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?"Hello, world!":END 6h5DvSO
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现代版BASIC(例如Quick BASIC): d ,"L8
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Print "Hello, world!" i>elK<R4
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以下的语句在Quick BASIC中同样有效: 6gy;Xg
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? "Hello,world!" GkU]>8E'"
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BCPL y [jck:
GET "LIBHDR" !3*:6
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LET START () BE pnTuYT^%)
$( vx7wW<e%D
WRITES ("Hello, world!*N") e&k=fV
$) =6YffXa_s
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Befunge P#j>hS
"!dlrow olleH">v o],z/MPL
, c.?+rcnq
^_@ >Hd Pcsl L
sjW;Nsp
sUe<21:
Brainfuck ]r&dWF
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< Jf</83RZ
+++++++++++++++.>.+++.------.--------.>+.>. WHk rd8
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C PSB@yV <
#include <stdio.h> =@\Li)Y
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int main(void) e0e3b]
{ CqAv^n7 }
printf("Hello, world!\n"); `mp3ORR;$
return 0; Y I?4e7Z+
} dN)@/R^E;
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C++
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#include <iostream> BpR#3CfW
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int main() <#ZDA/G(
{ A5q%ytI
std::cout << "Hello, world!" << std::endl; C<B1zgX
return 0; |M$ESj4@
} w+Oo-AGNH
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C++/CLI N*{>8iFo4
int main() Y'9<fSn5&
{ (i)Ed9~F"
System::Console::WriteLine("Hello, world!"); L=v"5)m2R
} -egu5#d>
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C# (C Sharp) @FLa i
class HelloWorldApp ];U}'&
{ Q<UKR|6
public static void Main() 69C>oX
{ -Izc-W
System.Console.WriteLine("Hello, world!"); Xhk_h2F[
} nNP{>\x;"
} k<.VR"I
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no
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COBOL R1j)0b6cQ%
IDENTIFICATION DIVISION. R2B0?fu
PROGRAM-ID. HELLO-WORLD. ;Y@"!\t}
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ENVIRONMENT DIVISION. 5#}wI~U;
$?Yw{%W
DATA DIVISION. A6AIkKjzq
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PROCEDURE DIVISION. `7o(CcF6H
DISPLAY "Hello, world!". k_A
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STOP RUN. 0o*
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f%ynod8
Common Lisp 5;yVA
(format t "Hello world!~%") Y:3\z?oV[
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ANWUo}j
DOS批处理 "PtOe[Xk
@echo off 9xZ?}S:d
echo "Hello, world!" (U@uJ
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X!=*<GF)
Eiffel +ug[TV
class HELLO_WORLD lV)SOs$
i#1~<U
creation cd?a rIV5
make Z`97=:W
feature |@lVFEl]
make is $" `9QD~
local h6Q-+_5
io:BASIC_IO eK_Yt~dj
do p}{V%!`_
!!io !tr
/$
io.put_string("%N Hello, world!") .0H!B#9
end -- make F)Qj<6
end -- class HELLO_WORLD ,`nl";Zc
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Erlang mzoNXf:x
-module(hello). /c9%|<O%
-export([hello_world/0]). 8QaF(?
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hello_world() -> io:fwrite("Hello, World!\n"). @[] A&)B
cc|"^-j-7
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Forth e) x;3r"j
." Hello, world!" CR jpW(w($XL
ZPolE_P7
JJn+H&[B
Fortran }5qjGD
WRITE(*,10) r")zR,
10 FORMAT('Hello, World!') 2xJT!lN
STOP ~!G&K`u
END $h|rd+},
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TR([u
HTML JHCV7$RS
<HTML> lS:R##
<HEAD> B>TI dQ
<TITLE> Hello World! </TITLE> .7EZB
</HEAD> Y
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<BODY> afWEt -
<p>Hello World!</p> oL69w1
</BODY> bAl0z)p
</HTML> GP/Gv
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INTERCAL D@yuldx'/
PLEASE DO ,1 <- #13 8*V8B=q}K
DO ,1 SUB #1 <- #238 uVBMI.&w
DO ,1 SUB #2 <- #112 ->S6S_H/+&
DO ,1 SUB #3 <- #112 EjYCOb-
DO ,1 SUB #4 <- #0 M+N7JpR
DO ,1 SUB #5 <- #64 koizk&)
DO ,1 SUB #6 <- #238 W%k0_Y/5
DO ,1 SUB #7 <- #26 P=jbr"5Q:
DO ,1 SUB #8 <- #248 rLm:qu(F1
DO ,1 SUB #9 <- #168 dGb]`* E
DO ,1 SUB #10 <- #24 c*"TmDY
DO ,1 SUB #11 <- #16 s3LR6Z7;i
DO ,1 SUB #12 <- #158 J&