“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。 kr#I{gF
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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》。 Im6U_JsNZh
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以下是用不同语言写成的Hello World程序的几个例子: Bn{)|&;
Ada NJ<N %hcjK
with Ada.Text_Io; use Ada.Text_Io; ):S!Nl
procedure Hello is R+s1[Z
begin =m~ruZ/
Put_Line ("Hello, world!"); )]wuF`
end Hello; bCzdszvg3
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汇编语言 {f-XyF1`
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x86 CPU,DOS,TASM +uELTHH=
MODEL SMALL /0
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IDEAL (oF-O{
STACK 100H oQ{cSThj
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DATASEG b9y)wBC%`
HW DB 'Hello, world!$' G,B?&gFX
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CODESEG ~zMDY F"&
MOV AX, @data n%*tMr9 s
MOV DS, AX XwtAF3oz
MOV DX, OFFSET HW RYH)AS4w'
MOV AH, 09H \ p3v#0R{
INT 21H h<)yJh
MOV AX, 4C00H )&Mq,@
INT 21H ]9s\_A9
END [-Cu4mff
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x86 CPU,GNU/Linux,NASM .ots?Ns
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). w
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;Enter this into "hello.asm" then type: 1#]B^D
;"nasm -f elf hello.asm" O~atNrHD
;"ld hello.o -o hello" ~?CS_B *
;"./hello" *.o"ZVl
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section .data ;data section declaration z<i,D08|d
msg db 'Hello World!',0AH ;7L ;
len equ $-msg ;string length rfc|`*m}0
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section .text ;code section declaration $,@JYLC2
global _start ;entry point (start of execution) SetX#e?q~
_start: mov edx,len ;string length cN5"i0xk
mov ecx,msg ;string start wh*:\_!0\
mov ebx,1 ;file handle: stdout ZL,6_L/
mov eax,4 ;sys_write t| _{;!^
int 80h ;kernel system call FD))'!>
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mov ebx,0 ;return value 6P^hN%0
mov eax,1 ;sys_exit ~pRs-
int 80h ;kernel system call j$mz3Yk
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x86 CPU,Windows,MASM32 \OT6L'l],
.386 ]q&tQJ/Fa
.model flat,stdcall ??j&i6sp
option casemap:none SwX@I6huM
;Include 文件定义 kf'=%]9#_T
include windows.inc >e/ r2U
include user32.inc 9OfU7_m
includelib user32.lib 50*@.!^*
include kernel32.inc a MsJO*;>
includelib kernel32.lib yuv4*
;数据段 uRpBeH]Z"
.data
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szCaption db 'A MessageBox!',0 ~2(]ZfO?>H
szText db 'Hello,world!',0 {m'AY)
;代码段 E>"8/
.code LZa%
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start: #"<?_fao~
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK MOeoU1Hn
invoke ExitProcess,NULL B$j' /e-Zk
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> ;?`@"YG)
end start gvlFumg2
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BEGIN { print "Hello, world!" } GMw)*
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BASIC YXRjx.srf
传统版BASIC(例如GWBASIC): >jKjh!`)!e
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10 PRINT "Hello, world!" SiR\a!, C
20 END 0qR$J
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或在提示符输入: _A3X6
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?"Hello, world!":END NNp}|a9
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现代版BASIC(例如Quick BASIC): $+jy/:]D
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Print "Hello, world!" ju.OW`GM
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以下的语句在Quick BASIC中同样有效: &F`L}#oL&
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? "Hello,world!" AqqHD=Yp
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GET "LIBHDR" C=[Ae,
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LET START () BE n.ct]+L
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WRITES ("Hello, world!*N") 4m\([EO
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Befunge @ t|3gF$X
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C PT05DH
#include <stdio.h> }PmTR4F!}
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int main(void) MX?}?"y
{ ;:?*t{r4#
printf("Hello, world!\n"); m/{Y]D{2
return 0; iJ4<f->t
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C++ "f<#.}8
#include <iostream> 0Nt%YP
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int main() [aHlu[,
{ _0m}z%rI
std::cout << "Hello, world!" << std::endl; "*t6t4/Q
return 0; "vsjen.K>
} #<UuI9
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C++/CLI ]1tN|ODY*W
int main() }H; ]k-)
{ ]| z")gOE
System::Console::WriteLine("Hello, world!"); xY+A]Up|w
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C# (C Sharp) [?|5oaK
class HelloWorldApp R@&?i=gk
{ 9!cW
public static void Main() t:disL&!E
{ Rn8#0%/Q
System.Console.WriteLine("Hello, world!"); a0 qj[+
} Q6xgLx[
} <9T
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COBOL
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IDENTIFICATION DIVISION. N*?
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PROGRAM-ID. HELLO-WORLD. {8_:4`YZ
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ENVIRONMENT DIVISION. 6mX: =Q
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DATA DIVISION. !SN6
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PROCEDURE DIVISION. WGluZhRuT3
DISPLAY "Hello, world!". /oB K&r[(
STOP RUN. D=<t;+|
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Common Lisp s9=pV4fA~w
(format t "Hello world!~%") O$YJku
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DOS批处理 8}]l9"q(
@echo off 3huzz<n3
echo "Hello, world!" N IO;
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Eiffel H)-L%l|9
class HELLO_WORLD (gFQK[
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creation <ihhV e
make Gt?!E6^!
feature f45x%tha %
make is tPQ2kEW
local PsacXZNs\N
io:BASIC_IO \t[
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do ^a: Saq-}
!!io }x>}:"P;W
io.put_string("%N Hello, world!") bwv/{3G,Ys
end -- make vr5<LNCLQ
end -- class HELLO_WORLD (8+.#1!*
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Erlang Sz^TGF
-module(hello). PL9zNCr-[
-export([hello_world/0]). `@W3sW/^
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hello_world() -> io:fwrite("Hello, World!\n"). O(b"F?
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Forth 5VCMpy
." Hello, world!" CR ,K"r:)\
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Fortran e<&_tx
WRITE(*,10) ?Yynd
10 FORMAT('Hello, World!') /r #b
STOP U0lqGEZ
END $sB48LJuU'
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HTML n3-GnVC][
<HTML> 4+Li)A:4.
<HEAD> p7?CeyZ-V
<TITLE> Hello World! </TITLE> k:&?$
</HEAD> NXC~#oG
<BODY> S}XB
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<p>Hello World!</p> 1t}
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</BODY> o+PQ;Dl
</HTML> HY@kw>I
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