“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。 dCJR,},\f
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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》。 QMfy^t+I
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以下是用不同语言写成的Hello World程序的几个例子: j`-y"6)
Ada |^9ig_k`
with Ada.Text_Io; use Ada.Text_Io; !urd
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procedure Hello is [tw<TV"\
begin N#-\JlJ)
Put_Line ("Hello, world!"); 9'L0Al~L
end Hello; :zy'hu;
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汇编语言 M/`z;a=EP
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x86 CPU,DOS,TASM 8Nq Iz
MODEL SMALL -bX.4+U
IDEAL !suiqP1\*
STACK 100H 5v-;*
OM C|.[
DATASEG Kpbber
HW DB 'Hello, world!$' @<{#v.T
wI]>0geb*
CODESEG hp%Pg &
MOV AX, @data /
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MOV DS, AX Z8_gI[Zn
MOV DX, OFFSET HW &!aLOx*3`
MOV AH, 09H 0r&9AnnWu+
INT 21H HbVV]y
MOV AX, 4C00H nU#q@p)Xg
INT 21H Qvg"5_26v
END "TNUw&ih
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x86 CPU,GNU/Linux,NASM q2pao?aa
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). y:Ab5/bHy
;Enter this into "hello.asm" then type: QnAf A%
;"nasm -f elf hello.asm" 5}aC'j\
;"ld hello.o -o hello" H<Taf%JT
;"./hello" %QZ!Tb
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section .data ;data section declaration S;<?nz3
msg db 'Hello World!',0AH 9
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len equ $-msg ;string length $?Mz[X
Lj AIB(*
section .text ;code section declaration -H;y_^2
global _start ;entry point (start of execution) h>Pg:*N,(
_start: mov edx,len ;string length $
T_EsnN
mov ecx,msg ;string start { qx,X.5$
mov ebx,1 ;file handle: stdout 6?x{-Zj^?
mov eax,4 ;sys_write vrDRSc6_
int 80h ;kernel system call ~7H.<kJt
;;H:$lx
mov ebx,0 ;return value 6KTY`'I
mov eax,1 ;sys_exit V2* |j8|
int 80h ;kernel system call Q 8E~hgO
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x86 CPU,Windows,MASM32 oh)l\
.386 zUu>kJZ
.model flat,stdcall -+Dvyr
option casemap:none W"@lFUi
;Include 文件定义 *\vc_NP]
include windows.inc 3k0%H]wt
include user32.inc bj^m<}
includelib user32.lib v%Q7 \X(
include kernel32.inc }}Uv0g8D
includelib kernel32.lib ><7`$ 2Or
;数据段 1"6k5wrIA
.data 8H b|'Q|^
szCaption db 'A MessageBox!',0 ea+rjv m
szText db 'Hello,world!',0 QYGxr+D
;代码段 *s4!;2ZhsU
.code mf'1.{
start: Jjq%cA
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK I]$d,N!.
invoke ExitProcess,NULL jYZWf `X~
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> dG$0d_Pq
end start .NC}TFN|
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BEGIN { print "Hello, world!" } T480w6-@
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BASIC f}!26[_9{
传统版BASIC(例如GWBASIC): t"Hrn3w
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10 PRINT "Hello, world!" uK5Px!
20 END %Q~Lk]B?t
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或在提示符输入: 0E[Se|!
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?"Hello, world!":END qZ}XjL
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现代版BASIC(例如Quick BASIC): 0/]vmDr
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Print "Hello, world!" uoHhp 4>^
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以下的语句在Quick BASIC中同样有效: YPEd
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? "Hello,world!" l$KcS&{w9
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BCPL M8 }M*\2
GET "LIBHDR" t_Wn<)XA
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LET START () BE uNg.y$>CX
$( {jI/9
WRITES ("Hello, world!*N")
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$) N';lc:Ah~
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Befunge )O
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"!dlrow olleH">v t |h mEHUk
, bwFc>{Wo5
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++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< ^D|c
+++++++++++++++.>.+++.------.--------.>+.>. Yw<:I&
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#include <stdio.h> U\{Z{F%8
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int main(void) .Dmvgi]
{ Vp$ckr
printf("Hello, world!\n"); -(G2@NG
return 0; !c7Od
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} D>Z_N?iR
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C++ 5EUkp6Y
#include <iostream> ez>@'yhK
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int main() t;'.D @
{ _HQa3wj
std::cout << "Hello, world!" << std::endl; KWo)}m*6
return 0; HApP*1J^c
} <k!G%R<9
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C++/CLI $;1~JOZh
int main() 9[*kpMC
{ \=<.0K A~
System::Console::WriteLine("Hello, world!"); 6>Y}2fT}o3
} iC]}M
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C# (C Sharp) +!(hd
class HelloWorldApp |7-tUHMo[
{ HNPr|
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public static void Main() ^ytd~iK8
{ $j/F7.S
System.Console.WriteLine("Hello, world!"); : Ej IV]e
} U
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} I}=}S"v
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COBOL 1"k@O)?JP
IDENTIFICATION DIVISION. :<W8uDAs
PROGRAM-ID. HELLO-WORLD. QI-3mqL
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ENVIRONMENT DIVISION. ?cvv!2B]T
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DATA DIVISION. r/e&}!
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PROCEDURE DIVISION. F\e'z
DISPLAY "Hello, world!". QbWD&8T0O
STOP RUN. &,/T<V
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Common Lisp UgP5^3F2
(format t "Hello world!~%") /d4xHt5a
P<hqr;
-~q]0>
DOS批处理 o\#C] pp
@echo off R&QT
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echo "Hello, world!" 8/CGg_C1
9(_/jU4mc
0)B+:
Eiffel MouYZI)
class HELLO_WORLD wg_Z!(Hr#
l;2bBx7vW
creation 'a}{s>{O
make g`j%jQuY
feature 2I7P}=
make is +*dJddz
local HUJ $e2[
io:BASIC_IO yZ{YIy~
do 7~',q"4P/_
!!io r0sd_@Oj
io.put_string("%N Hello, world!") M3V[p9>
end -- make }Z6/b
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end -- class HELLO_WORLD ?|33Np)
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Erlang `u U@(
-module(hello). Rg6>6.fk*
-export([hello_world/0]). 1pK7EK3R
cZYX[.oIB
hello_world() -> io:fwrite("Hello, World!\n"). uzo}?X#
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jmIP c3O0
Forth 'e*C^(6
." Hello, world!" CR >i~c>+R
0kkiS3T
_D:/?=y;e
Fortran 5v3B8 @CsA
WRITE(*,10) !|!V}O
10 FORMAT('Hello, World!') $`
STOP S("bN{7nE
END & mWq'h
YS]RG/'
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HTML 4-m%[D
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<HTML> 3FdoADe{{
<HEAD> li{_biey}
<TITLE> Hello World! </TITLE> | @YN\g K;
</HEAD> 7 XY C.g
<BODY> YJ9_cA'A
<p>Hello World!</p> k@2gw]y"
</BODY> I#0.72:[
</HTML> itP_Vxo/H
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k\lj<v<vD
INTERCAL \!PC:+uJ
PLEASE DO ,1 <- #13 wqyAEVea'8
DO ,1 SUB #1 <- #238 E'ZWSpP
DO ,1 SUB #2 <- #112 ~ce.&C7cR
DO ,1 SUB #3 <- #112 Q>r Q/V
DO ,1 SUB #4 <- #0 LOA
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DO ,1 SUB #5 <- #64 ;V;4#
DO ,1 SUB #6 <- #238 ?YS`?Rr
DO ,1 SUB #7 <- #26 J kA~Ol
DO ,1 SUB #8 <- #248 3EFk] X
DO ,1 SUB #9 <- #168 (3-G<