“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。 @].!}tz
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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》。 3}3b@: <
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以下是用不同语言写成的Hello World程序的几个例子: a{}#t}
Ada _I3"35a
with Ada.Text_Io; use Ada.Text_Io; /pU`-
procedure Hello is m~W[,7NE0&
begin z<^LY]
Put_Line ("Hello, world!"); }M"])B I
end Hello; "Dq^r9
VM&Ref4
@}waZ?'
汇编语言 +>2.O2)%q
</5
x86 CPU,DOS,TASM ob9od5Rf
MODEL SMALL 2?:OsA}
IDEAL (d,OLng
STACK 100H MT)q?NcG
^r(]S%
DATASEG 8KkN
"4'
HW DB 'Hello, world!$' PA*k|
?UIW&*h}
CODESEG Z 5P4 H
MOV AX, @data l=Jw6F+5
MOV DS, AX pV\ >?
MOV DX, OFFSET HW N7}3?wS
MOV AH, 09H 7B5b
+
INT 21H PBE i"`i
MOV AX, 4C00H -bSM]86
INT 21H Pf?&ys6
END CK|AXz+EN
^5?|Dj
car|&b
x86 CPU,GNU/Linux,NASM xX{Zh;M&[
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). ]mNsG0r6
;Enter this into "hello.asm" then type: uTJ z"c`F
;"nasm -f elf hello.asm" m!^$_d\%~
;"ld hello.o -o hello" =(P$P
;"./hello" R^$EnrY(<
=b1
y*?
section .data ;data section declaration X&rsWk
msg db 'Hello World!',0AH ySDo(EI4
len equ $-msg ;string length N'l2$8
7)2Q
section .text ;code section declaration Rg46V-"d,@
global _start ;entry point (start of execution) Ly2!(,FB.
_start: mov edx,len ;string length ]BRwJ2< x
mov ecx,msg ;string start :9x]5;ma
mov ebx,1 ;file handle: stdout i-p,x0th
mov eax,4 ;sys_write ZWjje6
int 80h ;kernel system call s?k:X ~m
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mov ebx,0 ;return value h -091N
mov eax,1 ;sys_exit 8I#^qr5
int 80h ;kernel system call Y,,Z47%
E
hcYqiM@8>
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;Q
x86 CPU,Windows,MASM32 M%Vp_
0
.386 OUO'w6m!
.model flat,stdcall +!nf?5;
option casemap:none fk1d iB
;Include 文件定义
rf'A+q
include windows.inc Vu4LC&q
include user32.inc \`2EfYJ{
includelib user32.lib U#PgkP[4
include kernel32.inc k,<7)-
includelib kernel32.lib ]-a/)8
;数据段 G-]<+-Q$4
.data u}_x
szCaption db 'A MessageBox!',0 C8)s6
szText db 'Hello,world!',0 ni )G
;代码段 tux`-F
.code "A~D(1K
start: =JPY{'V O
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK on5\rY<I:@
invoke ExitProcess,NULL 1~2+w]-kU
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> $$Ibr]$5
end start yzL9Ic
R*k;4*1u
a0B%x!y^
AWK RX^8`}N
BEGIN { print "Hello, world!" } CO@ kLI
#(a ;w
@ <4 U &
BASIC l>BM}hS
传统版BASIC(例如GWBASIC): CQ Ei(ty
10r!p:D
10 PRINT "Hello, world!" **AkpV)
20 END | "M1+(k7
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或在提示符输入: e8xNZG;
jJ2{g> P0P
?"Hello, world!":END {3K]Q=
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现代版BASIC(例如Quick BASIC): Y<N#{)Q
Kg /,
Print "Hello, world!" IC$"\7
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以下的语句在Quick BASIC中同样有效: gOE?
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? "Hello,world!" JP
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+R{~%ZTK
^Mhh2v
BCPL vJ 28A
GET "LIBHDR" XMxm2-%olP
M9~'dS'XI
LET START () BE f= }!c*l"
$( d:cOdm>,
WRITES ("Hello, world!*N") GlJOb|WOX
$) ~rXLb:
0Am\02R.C,
B_8JwMJu3
Befunge KRP6b:+4L
"!dlrow olleH">v P~x4h{~Gd
, qM3(OvCt
^_@ )`gxaT>&l
H3iYE~^#
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Brainfuck 9>&p:+D
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< t)O]0)
s
+++++++++++++++.>.+++.------.--------.>+.>. :qShP3 ^
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C 3(*vZ
#include <stdio.h> i_`Po%
zt!>
int main(void) Zba<|C
{ LCH w.
printf("Hello, world!\n"); fNyXDCl
return 0; K>\v<!%a
} 889^P`Q5
]'>jw#|h
Go]y{9+(7
C++ I.SMn,N
#include <iostream> GFnwj<V+{
m5P@F@
int main() 1NrNTBI@
{ rV-Xsf7Z
std::cout << "Hello, world!" << std::endl; *rV{(%\m
return 0; v!n|X7
} N];K
p"*xyex
cb. -AlqQ
C++/CLI *W 04$N
int main() lm +s5}*%o
{ .H&XPW
System::Console::WriteLine("Hello, world!"); sYk#XNH
} !9V;
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C# (C Sharp) y^
st
T^
class HelloWorldApp &*Kk>
4
{ Q
} 0_}W
public static void Main() [8acan+
2l
{ 9sv#TT5V
System.Console.WriteLine("Hello, world!"); 9El{>&Fs4
} yU~wZjw
} "b)EH/s
$o)}@TC
8ddBQfCY
COBOL #B_H/9f(
IDENTIFICATION DIVISION. H5jk#^FD
PROGRAM-ID. HELLO-WORLD. :C&6M79k
p<FqK/
ENVIRONMENT DIVISION. {t]8#[lo
@j(2tJ,w
DATA DIVISION. 6"r _Y7%
a:1$i dj
PROCEDURE DIVISION. _ vAc/_N
DISPLAY "Hello, world!". F"'
(i
STOP RUN. 52'6wwv6?
$$B#S'
@FRas00)|
Common Lisp I(/*pa?m{
(format t "Hello world!~%") q[. p(6:
-f<}lhmQ
=C7<I
DOS批处理 _X{ GZJm
@echo off scE#&OWF%
echo "Hello, world!" .[?2_e#9 %
I &%
Z*H
gmiLjI
Eiffel
C +Wa(K
class HELLO_WORLD lxR]Bh+
@)ls+}=Y
creation m1sV~"v;
make hw B9N
feature sM9utR
make is !_iv~Q zv
local xd4~[n\hm
io:BASIC_IO =W gzj|Kr
do emT/H95|,
!!io )]zsAw`/
io.put_string("%N Hello, world!") )3 '8T>^<K
end -- make 1>bNw-kz7
end -- class HELLO_WORLD I 6L3M\+-
iBY16_q
]#'&x%m
Erlang ahN8IV=+Gm
-module(hello). ;2aPhA
-export([hello_world/0]). .k,,PuP
"z*?#&?,
hello_world() -> io:fwrite("Hello, World!\n"). 8 9maN
Vf$$e)
E>u U6#v
Forth wF*9%K'E
." Hello, world!" CR "9NWsy}<c
AO(zl*4
v&sl_w/tn
Fortran #9HX"<5
WRITE(*,10) 7GJcg7s*T
10 FORMAT('Hello, World!') bUuQ"!>ppu
STOP 4Q,|7@
END n8z++T&
j@/p: fk
@E"lN
HTML /1xBZfrN
<HTML> DjvPeX
<HEAD> 59X XmVg
<TITLE> Hello World! </TITLE> 1%";|
</HEAD> )E^Pn|H
<BODY> 34J*<B[Njo
<p>Hello World!</p> 0~Xt_rN](
</BODY> 5>VX]nE3!
</HTML> Z4sS;k]}
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qCF&o7*oN
x+[ATZ([
INTERCAL #[Rs&$vQm
PLEASE DO ,1 <- #13 rrG}; A
DO ,1 SUB #1 <- #238 RW<4",
DO ,1 SUB #2 <- #112 &