“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。 *`HE$k!
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将Hello World程序作为第一个学写的程序,现在已经成为一种传统。该程序最早出现在由Brian Kernighan和Dennis Ritchie写的计算机程序设计教程《C语言程序设计》。 1-=zSWmyK
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以下是用不同语言写成的Hello World程序的几个例子: DE^ @b+6
Ada 0f<$S$~h
with Ada.Text_Io; use Ada.Text_Io; ee=d*)
procedure Hello is <&$:$_ah
begin mq(*4KFWJ2
Put_Line ("Hello, world!"); HYkZMVH{
end Hello; pzPm(M1^X
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汇编语言 ]_ON\v1
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x86 CPU,DOS,TASM zU7/P|Dw+
MODEL SMALL iq!u}# x_
IDEAL 07?| "c.
STACK 100H n #|p R2
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DATASEG \D]H>i$
HW DB 'Hello, world!$' o|v_+<zD!
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CODESEG gZ^NdDBO
MOV AX, @data )|` #BC
MOV DS, AX d&'}~C`~k
MOV DX, OFFSET HW !VfP#B6.
MOV AH, 09H Cy~Pfty
INT 21H O\(0{qu
MOV AX, 4C00H 3]X~bQAw
INT 21H ?oc#$fcQ~
END Po=@
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x86 CPU,GNU/Linux,NASM xfE:r:
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). .>{.!a
;Enter this into "hello.asm" then type: 7Qc
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;"nasm -f elf hello.asm" Z\`i~
;"ld hello.o -o hello" ;U^7]JO;
;"./hello" abVz/R/o
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section .data ;data section declaration 9?
#pqw
msg db 'Hello World!',0AH jo-qP4w
len equ $-msg ;string length c-2##Pf_8O
ft"B,
section .text ;code section declaration ftqi >^i
global _start ;entry point (start of execution) 2bB&/Uumsd
_start: mov edx,len ;string length wV9[Jl\Z
mov ecx,msg ;string start Hz&.]yts2J
mov ebx,1 ;file handle: stdout 2JV,AZf
mov eax,4 ;sys_write #SzCd&hI
int 80h ;kernel system call <L72nwcK
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mov ebx,0 ;return value 16p$>a<6
mov eax,1 ;sys_exit ^h :%%\2
int 80h ;kernel system call v/4Bt2J
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x86 CPU,Windows,MASM32 Z|z+[V}[
.386 `qjiC>9
.model flat,stdcall A7;|~??
option casemap:none FTihxC?.L
;Include 文件定义 q0oNRAvn"
include windows.inc },2mIit(
include user32.inc jtMN )TM
includelib user32.lib Qo!/n`19
include kernel32.inc c&Mci"nj0
includelib kernel32.lib Iaq7<$XU
;数据段 pm*6&,
.data +{$NN
szCaption db 'A MessageBox!',0 d `z),A=
szText db 'Hello,world!',0 &s|&cT
;代码段 .[Z<r>
.code Felu`@b
start: \eD{bD
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK -L&FguoVB
invoke ExitProcess,NULL U-P\F-
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> gUoL8~
end start j&G*$/lTO6
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AWK B/(]AWi+
BEGIN { print "Hello, world!" } M``I5r*cg
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BASIC :\+;5Se+l
传统版BASIC(例如GWBASIC): }NQ{S3JW
%lw!4Z\gg
10 PRINT "Hello, world!" S
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20 END FQbF)K~e
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或在提示符输入: f$lf(brQ:
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?"Hello, world!":END qc*z`Wz:
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现代版BASIC(例如Quick BASIC): g|W|>`>
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Print "Hello, world!" \X=?+|
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以下的语句在Quick BASIC中同样有效: 2BU%4IG
!,mv 7Yj
? "Hello,world!" qL6Rs
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A;t6duBDf/
BCPL Y5}<7s\UDO
GET "LIBHDR" A=7
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LET START () BE 7Ca+Pe}/n,
$( *}Al0\q0M
WRITES ("Hello, world!*N") o%+8.Tx6wT
$) 7/"g}
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Befunge +gG6(7&+=
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Brainfuck oC]|ARgQk|
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< GW_@hYIqD
+++++++++++++++.>.+++.------.--------.>+.>. vHY."$|H
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C sLE@Cm]k
#include <stdio.h> *&b~cyC
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int main(void) &;~x{q]3
{ o}XbFLn
printf("Hello, world!\n"); `%lgT+~T
return 0; |OXufV?I
} ?fB}9(6
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C++ 26fbBt8nP
#include <iostream> #C+""qm
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int main() >&K1+FSmyJ
{ x)M=_u2 _
std::cout << "Hello, world!" << std::endl; T{1Z(M+
return 0; Mf0XQ3n`H
} y{~l&zrl
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C++/CLI 6~Y-bn"%D5
int main() sK~d{)+T
{ hjB G`S#
System::Console::WriteLine("Hello, world!"); 4}:a"1P"
} t_@xzt10y
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C# (C Sharp) ;~Eb Q
class HelloWorldApp $:I~y|
!1
{ @D!KFJ
public static void Main() >b>3M'
{ ='1J&w~7
System.Console.WriteLine("Hello, world!"); :IFTiq5a;
} GdFTKOq
} "]}+QK_
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COBOL B;A^5~b
IDENTIFICATION DIVISION. ][8ZeM9&p
PROGRAM-ID. HELLO-WORLD. Xp<RGp7E
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ENVIRONMENT DIVISION. X4emhB
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DATA DIVISION. _ukKzY
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PROCEDURE DIVISION. g>h5NrDN
DISPLAY "Hello, world!". jHPJk8@y
STOP RUN. 5_U3Fs
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Common Lisp k;v23
(format t "Hello world!~%") |t^7L )&y
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DOS批处理 PJu)%al
@echo off yZ t}Jnv
echo "Hello, world!" "|{O%X
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Eiffel k36%n
*4
class HELLO_WORLD >&h#t7<
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creation B JDe1W3;'
make 9.R)iA
feature @; ayl
make is 3 }Z[d
local (KaP=t}
io:BASIC_IO WAlsh
do pyZ&[*@
!!io $a(EF
6
io.put_string("%N Hello, world!") o.DT`L8
end -- make JFVal#
end -- class HELLO_WORLD olzP=08aaV
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Erlang @)m H"u!(7
-module(hello). K1O0/2O
-export([hello_world/0]). kQXtO)
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hello_world() -> io:fwrite("Hello, World!\n"). 3IHya=qN
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Forth w~>V2u_-
." Hello, world!" CR z5Hz-.
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Fortran ot P7;l
WRITE(*,10) E!J;bX5
10 FORMAT('Hello, World!') 4J*%$Vxv
STOP " FI]l<G&
END GkjTE2I3
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HTML 8Z%C7
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<HTML> RO,
<HEAD> v/6QE;BY&Q
<TITLE> Hello World! </TITLE> 7>`QX%
</HEAD> "YD<pRVB
<BODY> n'ft@7>%h
<p>Hello World!</p> {'8a'9\
</BODY> dV#h~
</HTML> g]O"l?xx1D
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