“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。 !1Ht{cA0
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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》。 FB
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以下是用不同语言写成的Hello World程序的几个例子: bL5u;iy)
Ada ?.Ip(g
with Ada.Text_Io; use Ada.Text_Io; %l!-rXp
procedure Hello is ZVrZkd`
begin 8d&%H,
Put_Line ("Hello, world!"); }hcY5E-n
end Hello; o4agaA3k
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汇编语言 M(n@ytz
MSB/O.
x86 CPU,DOS,TASM p =-~qBw
MODEL SMALL IsDwa qd|
IDEAL ]<S{3F=
STACK 100H oc#hAjB.
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DATASEG 3PlIn0+LX
HW DB 'Hello, world!$' ?%n"{k?#
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CODESEG B&<P >AZ
MOV AX, @data i1*0'x
MOV DS, AX
{BgJ=0g?
MOV DX, OFFSET HW Z*=$n_
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MOV AH, 09H AJ)&+H
INT 21H ;d
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MOV AX, 4C00H %"WhD'*z}
INT 21H LjIkZ'HuF
END D0>Pc9
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x86 CPU,GNU/Linux,NASM M`E}1WNQ?]
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). 5Vai0Qfcu:
;Enter this into "hello.asm" then type: Z;njSw%:
;"nasm -f elf hello.asm" *,~L_)vWO
;"ld hello.o -o hello" <(H<*Xf9
;"./hello" 0%)T]SDS
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section .data ;data section declaration }7_$[r'_oI
msg db 'Hello World!',0AH E()%IC/R
len equ $-msg ;string length Ys|SacWC
?Cx=!k.
section .text ;code section declaration M+b?qw
global _start ;entry point (start of execution) 7
D{%
_start: mov edx,len ;string length B:Awy/XMi
mov ecx,msg ;string start +O.qYX
mov ebx,1 ;file handle: stdout y>)c?9X
mov eax,4 ;sys_write Y?L>KiM$
int 80h ;kernel system call {|B[[W\TN
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mov ebx,0 ;return value T\bpeky~
mov eax,1 ;sys_exit i1'G_bo4F7
int 80h ;kernel system call 5>ktr)]
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x86 CPU,Windows,MASM32 Vhr 6bu]
.386 UcH#J &r
.model flat,stdcall [ako8
option casemap:none wvxsn!Ao&=
;Include 文件定义 {R_ <m$
include windows.inc {'z$5<|
include user32.inc A(n#k&W1fZ
includelib user32.lib 0Ue~dVrM(?
include kernel32.inc N
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includelib kernel32.lib _dmG#_1
;数据段 96P&+
.data 2+Oz$9`.
szCaption db 'A MessageBox!',0 9hh~u
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szText db 'Hello,world!',0 i0zrXaKV
;代码段 tU *`X(;
.code b=U3&CV9
start: p#_5w
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK GLX{EG9Z
invoke ExitProcess,NULL E VC]B}
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> M|zTs\1I
end start !
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BEGIN { print "Hello, world!" } gXM+N(M-
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BASIC pjs4FZ`Pd;
传统版BASIC(例如GWBASIC): 0s\ -iub=d
X8-x$07)
10 PRINT "Hello, world!" ?~(#~3x
20 END @|bJMi
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或在提示符输入: s`0IyQXVU
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?"Hello, world!":END HFlExau
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现代版BASIC(例如Quick BASIC): #9F>21UU
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Print "Hello, world!" 7#NHPn
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以下的语句在Quick BASIC中同样有效: $EEn]y
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? "Hello,world!" `w`F-ke]I
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BCPL 8R:Glif
GET "LIBHDR" Pai8r%Zfu
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LET START () BE j>uu3ADd2
$( O:GAS [O`
WRITES ("Hello, world!*N") os&FrtDg
$) vxLr034
[HUK
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Befunge kyt HOn#
"!dlrow olleH">v /y6f~F
, cza_LO(
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Brainfuck GZKYRPg
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< Yyr9Kj:
+++++++++++++++.>.+++.------.--------.>+.>. -A=3W3:C
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C ICr.Gwe3_
#include <stdio.h> 6}!1a?X
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int main(void) }6<5mq)%
{ [u37Hy_Gi
printf("Hello, world!\n"); I%GQ3D"=
return 0; j"aY\cLr t
} T93st<F=R
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C++ !c1M{klP
#include <iostream> ".waCt6
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int main() kS=nH9
{ dUt4]
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std::cout << "Hello, world!" << std::endl; F",TP,X
return 0; ",J&UTUh
} `b] wyP
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C++/CLI pe2:~}WB
int main() w6)Q5H53)
{ Y_n3O@,
System::Console::WriteLine("Hello, world!"); {"%a-*@%
} kh:_,g
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C# (C Sharp) 4,Oa(b
class HelloWorldApp <\O8D0.d
{ $eG_LY 1v
public static void Main() _X mxBtk9f
{ 6M_:D
System.Console.WriteLine("Hello, world!"); _aF8Us
} D,[Nn_N
} ]'M B3@T
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COBOL xkiiQs)
IDENTIFICATION DIVISION. D7JrGaF{
PROGRAM-ID. HELLO-WORLD. 79@CO6
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ENVIRONMENT DIVISION. a$Y{ut0t(
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DATA DIVISION. dcD#!v\0
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PROCEDURE DIVISION. 1[u{y{9 q
DISPLAY "Hello, world!". !<HMMf,-D
STOP RUN. )lJAMZ 5xp
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Common Lisp unew
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(format t "Hello world!~%") bhIShk[
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DOS批处理 <tZZ]Y]
@echo off eOF*|9
echo "Hello, world!" =b>TF B=*N
u)I\R\N
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Eiffel %;v~MC@
class HELLO_WORLD l9="ccM
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creation : [328X2
make ".$kOH_:
feature ;-@: }/
make is 0XCAnMVo
local :Dw_$
io:BASIC_IO LjE3|+pJ
do G?=&\fg_:
!!io jll:Rh(b
io.put_string("%N Hello, world!") ,>7dIJqzw
end -- make "0[`U(/
end -- class HELLO_WORLD a^@.C5
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Erlang 8h@L_*Kr
-module(hello). 9N)I\lcY
-export([hello_world/0]). Qkx*T9W
yq k8)\p
hello_world() -> io:fwrite("Hello, World!\n"). F0z7".)
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: slO0
Forth 9?hZf$z
." Hello, world!" CR jS[=Zx`
Nr `R3(X
LO)!Fj4|
Fortran {}ADsh@7d'
WRITE(*,10) aK;OzB)
10 FORMAT('Hello, World!') r(uo-/7z
STOP oxN5:)
END N<a%l J
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HTML dhLR#m30T
<HTML> J8r8#Zz
<HEAD> =RD>#' sUK
<TITLE> Hello World! </TITLE> BA1uo0S `S
</HEAD> }*QK;#NEc
<BODY> EYj~Xj8_
<p>Hello World!</p> g`S;xs
</BODY> hx9t{Zi
</HTML> iJ^}{-
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@9_mk@
INTERCAL {G x=QNd
PLEASE DO ,1 <- #13 IAwS39B
DO ,1 SUB #1 <- #238 @XM*N7
DO ,1 SUB #2 <- #112 d/OP+yzgZ
DO ,1 SUB #3 <- #112 Z^%a 1>`
DO ,1 SUB #4 <- #0 saiXFM7J
DO ,1 SUB #5 <- #64 3w"JzC@
DO ,1 SUB #6 <- #238 vu^mLc
DO ,1 SUB #7 <- #26 !(? 7V
DO ,1 SUB #8 <- #248 )AkBo
DO ,1 SUB #9 <- #168 =dA]nM
DO ,1 SUB #10 <- #24 -i{_$G8W/c
DO ,1 SUB #11 <- #16 #UL75
DO ,1 SUB #12 <- #158 >wmHCOL:
DO ,1 SUB #13 <- #52 C 4C/
PLEASE READ OUT ,1 ^U5N!"6R
PLEASE GIVE UP }aE'
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Java Oj _]`
public class Hello qna!j|90Lp
{ )M+po-6$1
public static void main(String[] args) \u[}
{ 7AT8QC`u
System.out.println("Hello, world!"); }#ta3 x
} IS(F_< .
} RVwS<g)~1
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nfHjIYid
JSP bk<Rp84vL
<% b<~8\\&
out.print("Hello, world!"); ^`id/
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MIXAL ^Z9bA( w8
TERM EQU 19 the MIX console device number J+IItO4%
ORIG 1000 start address f<