“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。 &]f8Xd
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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》。 ]c\`EHN
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以下是用不同语言写成的Hello World程序的几个例子: g\+!+!"~
Ada 7h.[eMLPB
with Ada.Text_Io; use Ada.Text_Io; iyR5mA
procedure Hello is U_9|ED:
begin <%4pvn8d?&
Put_Line ("Hello, world!"); sj+ )
end Hello; TJcHqzcUc
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汇编语言 ko{&~
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x86 CPU,DOS,TASM i*xVD`x ~
MODEL SMALL !!6@r|.
IDEAL 9e;{o,r@
STACK 100H |+-b#Sa9
Nog{w
DATASEG 3nq4Y'
HW DB 'Hello, world!$'
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# b3 14
CODESEG C:!&g~{cKi
MOV AX, @data fX
LsLh+~D
MOV DS, AX B|>eKI
MOV DX, OFFSET HW I]#x0 ?D
MOV AH, 09H IQ JFL
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INT 21H BL0xSNE**
MOV AX, 4C00H kT^`j^Jr
INT 21H ? _[q{i{
END H_iQR9Ak7
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x86 CPU,GNU/Linux,NASM (6)|v S
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). ^MWp{E
;Enter this into "hello.asm" then type: mphs^k< Z
;"nasm -f elf hello.asm" rv~OfL
;"ld hello.o -o hello" I'J-)D`
;"./hello" UHI<8o9
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section .data ;data section declaration KrTlzbw&p\
msg db 'Hello World!',0AH vQ5rhRG)E
len equ $-msg ;string length e{Mkwi+j
5 yL"=3&+
section .text ;code section declaration [7{cf`C
global _start ;entry point (start of execution) !4"$O@U4
_start: mov edx,len ;string length efyGjfoO
mov ecx,msg ;string start V' sq'XB
mov ebx,1 ;file handle: stdout SphP@J<ONW
mov eax,4 ;sys_write w\JTMS$
int 80h ;kernel system call &61h*s
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mov ebx,0 ;return value rB =c
mov eax,1 ;sys_exit :K*/
int 80h ;kernel system call EP{ji"/7[
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) Cm95,Y
x86 CPU,Windows,MASM32 {ZUgyGE{
.386 =1VpO{q
.model flat,stdcall TaG(sRI
option casemap:none $3Sm?
;Include 文件定义 @ +>>TGC
include windows.inc nI`9|W
include user32.inc 5N#Sic M
includelib user32.lib m4 c2WY6k
include kernel32.inc vf!lhV-UG+
includelib kernel32.lib YQ-V^e6
;数据段 ocj^mxh=O
.data tY`%vI [
szCaption db 'A MessageBox!',0 :<6gP(
szText db 'Hello,world!',0 _nIt4l7
;代码段 wA";N=i=
.code xqj@T^y
start: e1H2w?
s
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK _dVA^m
invoke ExitProcess,NULL 69Q#UJ
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> _.GHtu/I
end start +qa^K%K
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BEGIN { print "Hello, world!" } )5<c8lzp
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BASIC &A&2z l %#
传统版BASIC(例如GWBASIC): gGbJk&E
9!Bz)dJ3
10 PRINT "Hello, world!" LII4sf]
20 END B5qlU4km&
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或在提示符输入: fp$U%uj
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?"Hello, world!":END rW2
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现代版BASIC(例如Quick BASIC): hhJ>>G4R2
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Print "Hello, world!" -aM7>YR
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以下的语句在Quick BASIC中同样有效: UmP\;
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? "Hello,world!" f!}e*oX
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GET "LIBHDR" \x~},!l
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LET START () BE 9{R88f?;
$( 5J*h7
WRITES ("Hello, world!*N") A~wVY
$) $$---Y
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Befunge ?_@Mg\Hc
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Brainfuck q4KYC!b
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+++++++++++++++.>.+++.------.--------.>+.>. NfXEW-
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C [_3L
#include <stdio.h> MY z\ R
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int main(void) \`|OAC0a
{ ?`=r@
printf("Hello, world!\n"); F'JceU
return 0; O`'r:W
} 1y6{3AZm<
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C++ f26hB;n
#include <iostream> e/y\P&"eI
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int main() E3 aj
{ "S0WFP\P+
std::cout << "Hello, world!" << std::endl; Tf.DFfV#y
return 0; K`twbTU
} FSkz[D_}
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C++/CLI 2!g7F`/B
int main() P(~vqo>!
{ ~cW,B}
System::Console::WriteLine("Hello, world!"); hD>cxo
} E9v_6d[
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C# (C Sharp) s92SN F}g
class HelloWorldApp 0tp3mYd
{ +jGSD@32>
public static void Main() ])$Rw$`w
{ %j2ZQ/z
System.Console.WriteLine("Hello, world!"); t(5PKD#~Dc
} Zf8_ko;|:-
} 6,Y<1b*|Vo
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COBOL H 5'Ke+4.e
IDENTIFICATION DIVISION. "DU1k6XC
PROGRAM-ID. HELLO-WORLD. K_[B@( Xl
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ENVIRONMENT DIVISION. J(=io_\bO
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DATA DIVISION. h4k.1yH;
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PROCEDURE DIVISION. \"?5CHz*
DISPLAY "Hello, world!". }(Dt,F`
STOP RUN. *_!}g
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Common Lisp FR? \H"'x
(format t "Hello world!~%") 2H2Yxe7? -
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DOS批处理 >}6V=r3[+
@echo off 5 p! rZ
echo "Hello, world!" hSF4-Vvb
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Eiffel $ {5|{`
class HELLO_WORLD !ui:0_
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creation ><3!J+<?
make D:vX/mf;7
feature eeu;A,@U
make is aXRf6:\%
local $I:&5 o i
io:BASIC_IO oeIza<:=R
do o=y0=,:a?9
!!io < r7s,][&
io.put_string("%N Hello, world!") o-r00H|
end -- make Z@QJ5F1y
end -- class HELLO_WORLD ;FO( mL (
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Erlang _0E KE
-module(hello). }>< v7
-export([hello_world/0]). qpXsQim$~
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hello_world() -> io:fwrite("Hello, World!\n"). 8(|lP58~
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Forth +jN%w{^=
." Hello, world!" CR VFLW@
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Fortran w
WRITE(*,10) Hh{pp ^
10 FORMAT('Hello, World!') t?;\'
STOP o#=@!m
END t)4AQ
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HTML LMTz/M
<HTML> uwo\FI
<HEAD> EaUO>S
<TITLE> Hello World! </TITLE> #d;/Me
</HEAD> 4"~l^yK
<BODY> ^< wn
<p>Hello World!</p> $BUm,
</BODY> s{dgUX
</HTML> bTbF
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