“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。 #T&''a
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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》。 P @G2F:}
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以下是用不同语言写成的Hello World程序的几个例子: 7$Jb"s
Ada )Z,O*u*
with Ada.Text_Io; use Ada.Text_Io; g>cp;co9g
procedure Hello is =:uK$>[
begin X=8y$Yy
Put_Line ("Hello, world!"); }f/ 1
end Hello; )|zLjF$
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汇编语言 +7.\>Ucq`
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x86 CPU,DOS,TASM wL\OAM6R
MODEL SMALL "@#^/m)
IDEAL Rq|7$O5
STACK 100H >;LXy
!#Ub*qY1Z
DATASEG i]Njn k
HW DB 'Hello, world!$' scT,yNV
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CODESEG V9mqJRFJ:
MOV AX, @data (p>?0h9[
MOV DS, AX TgoaEufS<
MOV DX, OFFSET HW Y{ijSOl3
MOV AH, 09H )[oegfnn-
INT 21H N2#Wyt8MC
MOV AX, 4C00H 5<^$9('
INT 21H C8W#$a
END 2<q>]G-nN
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x86 CPU,GNU/Linux,NASM ^ ~'&K e
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). '1+s^Q'pc
;Enter this into "hello.asm" then type: d| ;S4m`
;"nasm -f elf hello.asm" 0%&ZR=y(G
;"ld hello.o -o hello" B]iPixA6
;"./hello" piULIZ0
n@[_lNa4GD
section .data ;data section declaration Se{x-vn?p
msg db 'Hello World!',0AH z@Pv~"
len equ $-msg ;string length l|RBO+}
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section .text ;code section declaration K2|2Ks_CS
global _start ;entry point (start of execution) |Tv}leJF
_start: mov edx,len ;string length Xt}
4B#
mov ecx,msg ;string start H{hd1
mov ebx,1 ;file handle: stdout $lVR6|n
mov eax,4 ;sys_write W T~UEK'
int 80h ;kernel system call 79`OB##
1 etl:gcEC
mov ebx,0 ;return value +-2o b90_m
mov eax,1 ;sys_exit :8h\x
int 80h ;kernel system call -Y>,\VEK
&YpViC4K.
&rs
x86 CPU,Windows,MASM32 {G. W?
.386 *@)0TL(03
.model flat,stdcall 08czP-)OZ
option casemap:none MD|T4PPz,}
;Include 文件定义 Z uFk}R"x
include windows.inc ?TWve)U
include user32.inc *^aEUp6&
includelib user32.lib h@AKfE!\~
include kernel32.inc )SU\s+"M
includelib kernel32.lib hQ7-m.UZw
;数据段 4*Uzomb?q
.data 4|U$ON?x
szCaption db 'A MessageBox!',0 ![3 /!
szText db 'Hello,world!',0 5-*hAOThg
;代码段 qtrN=c3x
.code yM}~]aQ y
start: X<8?>#
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK `)~]3zmG
invoke ExitProcess,NULL p>oC.[:4a
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> #ME!G/
end start T3wQ Rn
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BEGIN { print "Hello, world!" } _+7+90u
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BASIC #)r^ZA&E
传统版BASIC(例如GWBASIC): QHU|aC{r
\<ko)I#%
10 PRINT "Hello, world!" p~'iK4[&6
20 END >V%lA3
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或在提示符输入: \1Xr4H
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?"Hello, world!":END Xfc+0$U@
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现代版BASIC(例如Quick BASIC): |E?PQ?P
r=Tz++!
Print "Hello, world!" #Mw 6>5}<
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以下的语句在Quick BASIC中同样有效: q\pI&B
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? "Hello,world!" vmzc0J+3p
Yj CH KI"e
q@Aw]Kh
BCPL 6,;dU-A +
GET "LIBHDR" `.z"Q%uz
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LET START () BE .} O@<t
$( 8$F"!dc _
WRITES ("Hello, world!*N") I1pnF61U
$) ,B~5;/|
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4aP 96
Befunge LD*XNcE
"!dlrow olleH">v N_^PoX935O
, 5,\-;
^_@ m#Ydq(0+
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Brainfuck mv,5Q6!
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< 29AE B
+++++++++++++++.>.+++.------.--------.>+.>. 2$OV`qy@?
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C 2YDD`:R
#include <stdio.h> x2,;ar\D
h2-v.Tjf
int main(void) }_Ci3|G>%D
{ 6:~<L!`&
printf("Hello, world!\n"); Sse%~:FL
return 0; 7@&mGUALO
} 9^u}~e
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C++ `?{6L#
#include <iostream> q`'m:{8
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int main() )K8^}L,
{ +Wl]1
c/
std::cout << "Hello, world!" << std::endl; uO>x"D5tZ:
return 0; :7M%/#Fy
} l 88n*O
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C++/CLI **$kWbS
int main() =xQPg0g
{ /mA\)TL|]
System::Console::WriteLine("Hello, world!"); -^)<FY\
} <&^[?FdAa
Im?/#t X
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C# (C Sharp) PR/>E60H
class HelloWorldApp '>ASr]Q
{ (*M0'5
public static void Main() cTW$;Fpc+
{ e"UXG\8D
System.Console.WriteLine("Hello, world!"); >/Gw)K}#E
} 7+88o:G9
} {Q>4zepN!
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cTz@ga;!mI
COBOL yEMM@5W)8
IDENTIFICATION DIVISION. ^*YoNd_kpN
PROGRAM-ID. HELLO-WORLD. %K+hG=3O
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ENVIRONMENT DIVISION. EKO~\d
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DATA DIVISION. q:nUn?zB
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#R
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PROCEDURE DIVISION. ,Ne9x\F
DISPLAY "Hello, world!". (t){o>l
STOP RUN. # >I_
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Common Lisp 15VvZ![$V
(format t "Hello world!~%") W\($LD"X
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DOS批处理 )3A+Ell`
@echo off eIy:5/s
echo "Hello, world!" fs yVu|G
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<& 3[|Ca
Eiffel [ #ih
o(/
class HELLO_WORLD fN@ZJ~F%j
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creation <2oMk#Ng^
make & kVa*O
feature GGo~39G
make is G)^/#d#&
local skXzck
io:BASIC_IO {0lu>?<
do @-L\c>rqT
!!io auB
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io.put_string("%N Hello, world!") :{^~&jgL
end -- make c#CV5J\Kk3
end -- class HELLO_WORLD *3P+K:2lNG
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Erlang R:(i}g<3
-module(hello). |Xm$O1Wa
-export([hello_world/0]). 4s~X
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hello_world() -> io:fwrite("Hello, World!\n"). $a8,C\me?
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Forth <7>1Z
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." Hello, world!" CR 8ki3>"!A
`#w#!@s#@
9D &vxKE
Fortran w N`Njm9!
WRITE(*,10) ',!jYh}Uxk
10 FORMAT('Hello, World!') ,;5%&T
STOP ,\X! :y~
END @)0
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HTML x#&_/oqAk
<HTML> Q"U%]2@=
<HEAD> {tl{j1d|
<TITLE> Hello World! </TITLE> 4X*U~}
</HEAD> k0N>J8y
<BODY> yH]Q;X'
<p>Hello World!</p> IY8<^Q']
</BODY> cr<j<#(Z}
</HTML> yGNpx3H
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RM,aG}6M)M
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i
INTERCAL 0G-obHe0
PLEASE DO ,1 <- #13 0HU0p!yt&
DO ,1 SUB #1 <- #238 n*ShYsc
DO ,1 SUB #2 <- #112 `p9N| V
DO ,1 SUB #3 <- #112 *k_<|{>j(
DO ,1 SUB #4 <- #0 K> 4w
DO ,1 SUB #5 <- #64 4)OOj14-V
DO ,1 SUB #6 <- #238 i!8"T#
DO ,1 SUB #7 <- #26 _b/zBFa%
DO ,1 SUB #8 <- #248 3Mm_xYDud
DO ,1 SUB #9 <- #168 62,dFM7
DO ,1 SUB #10 <- #24 iX{2U lF7
DO ,1 SUB #11 <- #16 `JDZR:bMaT
DO ,1 SUB #12 <- #158 ~GX
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DO ,1 SUB #13 <- #52 {DKZ~
PLEASE READ OUT ,1 p`A2^FS)
PLEASE GIVE UP #9r}Kr=P
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Java EVZ1Z
public class Hello wT- <#+L\
{ %X.g+uu
public static void main(String[] args) #BcUE?K*N
{ u6?9#L(
System.out.println("Hello, world!"); / [49iIzC
} zI,Qc60B
} J^7M0A4K
~!2fUewEu
;SjNZi)4d
JSP T]z(>{
<% /;Hqv`X7
out.print("Hello, world!"); aXq ig&:
%> :x[()J~N
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