“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。 4u&l@BUr
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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》。 4t+88e
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以下是用不同语言写成的Hello World程序的几个例子: |zUDu\MZ{
Ada xFvSQ`sp
with Ada.Text_Io; use Ada.Text_Io; |Y99s)2&N
procedure Hello is v
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begin VEpQT
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Put_Line ("Hello, world!"); n/8fv~zU
end Hello; AKWw36lm
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汇编语言 Y{S/A *X
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x86 CPU,DOS,TASM $i2gOz
MODEL SMALL R.fRQ>rI
IDEAL . =+7H`A
STACK 100H O4#zsr:"
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DATASEG )a6i8b3
HW DB 'Hello, world!$' |On6?5((e
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CODESEG eQeNlCG
MOV AX, @data kjmF-\
MOV DS, AX !6}Cs3.
MOV DX, OFFSET HW -WYJ1B0v
MOV AH, 09H V{*9fB#4L
INT 21H .Q#Eb %%
MOV AX, 4C00H Q2 edS|
INT 21H -yAIrvO1q
END W"0 #
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x86 CPU,GNU/Linux,NASM :I7MP
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). ~Ch`A@=5
;Enter this into "hello.asm" then type: JxWHrsh[
;"nasm -f elf hello.asm" bH.">IV
;"ld hello.o -o hello" 4EELaP|%
;"./hello" [_~U<
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section .data ;data section declaration [|>.iH X
msg db 'Hello World!',0AH msCAC*;,
len equ $-msg ;string length W=b5{
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section .text ;code section declaration BkJcT
global _start ;entry point (start of execution) y>o#Hq&qM
_start: mov edx,len ;string length }I;W
mov ecx,msg ;string start ewLr+8
mov ebx,1 ;file handle: stdout V?gQ`( ,
mov eax,4 ;sys_write [ wROIvV
int 80h ;kernel system call $M8'm1R9
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mov ebx,0 ;return value J2R<'(
mov eax,1 ;sys_exit Ug"B/UUFd
int 80h ;kernel system call l5MxJ>?4%B
PFc02 w
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x86 CPU,Windows,MASM32 RWoiV10
.386 x O)nS _I
.model flat,stdcall vZKo&jUk
option casemap:none Jk~T.p?tF
;Include 文件定义 "pH+YqJ$
include windows.inc qB&*"gf
include user32.inc a2i
includelib user32.lib 7~65 @&P>
include kernel32.inc %_u3Np
includelib kernel32.lib IFE C_F>
;数据段 OO$<Wgh
.data s810714
szCaption db 'A MessageBox!',0 SUx0!_f*R
szText db 'Hello,world!',0 E8nqExQ
;代码段 kz&)a>aA
.code W t8 RC
start: @-m&X2J+c
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK -8o8lz
invoke ExitProcess,NULL GM%|mFqeu
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> ]juXm1)>W1
end start aB Yhk|Ei
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BEGIN { print "Hello, world!" } n% *u;iG
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传统版BASIC(例如GWBASIC): l5R H~F
%'>. R
10 PRINT "Hello, world!" $a-~ozr`C
20 END YgDgd\
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或在提示符输入: S)~h|&A(
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?"Hello, world!":END "qF&%r'
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现代版BASIC(例如Quick BASIC): e88JT_zrO
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Print "Hello, world!" %0]&o,
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以下的语句在Quick BASIC中同样有效: s<5t}{x
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? "Hello,world!" 1jV^\x0
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GET "LIBHDR" j{HxX
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LET START () BE LHacHv
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WRITES ("Hello, world!*N") 9LFg":
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Befunge E:i3
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+++++++++++++++.>.+++.------.--------.>+.>. -1< }_*
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#include <stdio.h> _2TIan}
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int main(void) P8TiB
{ 8n'C@#{WV
printf("Hello, world!\n"); >i0FGmxH
return 0; +/Z:L$C6
} P_qxw-s
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C++ p?!]sO1l
#include <iostream> *m|]c4
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int main() *+J&ebSTN
{ ,+q5e^P
std::cout << "Hello, world!" << std::endl; v&?Bqj
return 0; plp).Gq
} N),Zb^~nw
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C++/CLI L$jRg
int main() :Z/ig%
{ pY:xxnE
System::Console::WriteLine("Hello, world!"); bG5c~
} mp5]=6~:m
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C# (C Sharp) ly{~X
class HelloWorldApp + W +<~E
{ Pajr`gU
public static void Main() A5nu`e9&
{ *{tJ3<t(1
System.Console.WriteLine("Hello, world!"); K|s+5>]W/[
} lxxK6;r~>
} ]])i"oew
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COBOL b|xz`wUH0$
IDENTIFICATION DIVISION. {~=[d`t
PROGRAM-ID. HELLO-WORLD. FS20OD
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ENVIRONMENT DIVISION. hup]Jk
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DATA DIVISION. paF2{C)4
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PROCEDURE DIVISION. S#ven&
DISPLAY "Hello, world!". !Hgq7vZG
STOP RUN. jsL'O;K/
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Common Lisp !>! l=Z
(format t "Hello world!~%") Y[pGaiN:
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DOS批处理 KR z\ct|
@echo off i1sc oxX3\
echo "Hello, world!" O,DA{> *m
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Eiffel yJgnw6>r2
class HELLO_WORLD ^91k@MC
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creation z? cRsqf
make A]>0lB
feature @ VJr0
make is 0tl
local lQ)8zI
io:BASIC_IO K;YK[M1!
do =b;v:HC
!!io 8IVKS>
io.put_string("%N Hello, world!") 6v.*%E*P
end -- make T$'Ja'9Kj
end -- class HELLO_WORLD MEo+S
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} #$Y^ +UN
Erlang (D))?jnC
-module(hello). ^%C.S :
-export([hello_world/0]). []u!piW
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hello_world() -> io:fwrite("Hello, World!\n"). LtCkDnXk
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Forth ?SS?I
." Hello, world!" CR y/Nvts2!C
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Fortran }G-qOt
WRITE(*,10) psYfz)1;
10 FORMAT('Hello, World!') rYc?y
STOP jd~r~.y
END o6svSS
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HTML t6j(9[gGq
<HTML> hNP|
<HEAD> D?9=q
<TITLE> Hello World! </TITLE> %1e`R*I
</HEAD> K34y3i_
<BODY> bu\,2t}B
<p>Hello World!</p> l%;)0gT
</BODY> `<[Zs]Fe4
</HTML> d<#Xqc
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INTERCAL Tqm9><!r
PLEASE DO ,1 <- #13 M a_! 1Y
DO ,1 SUB #1 <- #238 ^@jOS{f l
DO ,1 SUB #2 <- #112 2)mKcUL-
DO ,1 SUB #3 <- #112 ^2Op?J
DO ,1 SUB #4 <- #0 )D(XDN
DO ,1 SUB #5 <- #64 B< 6*Ktc
DO ,1 SUB #6 <- #238 KJSN)yn\
DO ,1 SUB #7 <- #26 As78yfK
DO ,1 SUB #8 <- #248 AD~\/V&+
DO ,1 SUB #9 <- #168 Px)VDs=k
DO ,1 SUB #10 <- #24 lQ)ZsFs=
DO ,1 SUB #11 <- #16 :#b[gWl0Ru
DO ,1 SUB #12 <- #158 utRvE(IbmV
DO ,1 SUB #13 <- #52 E-&=I> B5
PLEASE READ OUT ,1 {iHC;a5gb$
PLEASE GIVE UP V18w
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Java *bwLih!}H
public class Hello ()XL}~I{!A
{ ou@Dd4
public static void main(String[] args) t?{E_70W
{ #&&^5r-b-
System.out.println("Hello, world!"); r?V\X7` +
} p`XI (NI
} V .$<