“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。 nG?Z* n
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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》。 v/$<#2|
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以下是用不同语言写成的Hello World程序的几个例子: "qZTgCOY2
Ada n? =O@yq
with Ada.Text_Io; use Ada.Text_Io; |\|
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procedure Hello is 6e5A8e8"]
begin jG}nOI
Put_Line ("Hello, world!"); gOE?
end Hello; :iQJ9Hdz
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汇编语言 _o+OkvhU
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x86 CPU,DOS,TASM ^)| tf\4
MODEL SMALL &H}Xk!q5b^
IDEAL KRP6b:+4L
STACK 100H Zk|PQfi+
MA%g-}
DATASEG sdd%u~4,X
HW DB 'Hello, world!$' z`u$C+Ov
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CODESEG wsAb8U C_
MOV AX, @data :qShP3 ^
MOV DS, AX =t~]@?]1D
MOV DX, OFFSET HW N
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b
MOV AH, 09H |GPYbxzc
INT 21H K 4{[s
z
MOV AX, 4C00H 7<2^8`
INT 21H >,)U46
END @.G;dL.f{
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x86 CPU,GNU/Linux,NASM q"f7$
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). ds{)p<LpT
;Enter this into "hello.asm" then type: W55kR.X6M
;"nasm -f elf hello.asm" 1NrNTBI@
;"ld hello.o -o hello" 91fZr
;"./hello" o##!S6:A
9Nz}'a;?>
section .data ;data section declaration 3YUF\L]yyw
msg db 'Hello World!',0AH g]?>6 %#rA
len equ $-msg ;string length 9"M-nH*<
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section .text ;code section declaration XF@34b5(
global _start ;entry point (start of execution) yVpru8+eD
_start: mov edx,len ;string length VjeF3pmBa
mov ecx,msg ;string start T=g2gmo9
mov ebx,1 ;file handle: stdout i0?/\@gd
mov eax,4 ;sys_write .8[uEQ_L
int 80h ;kernel system call mK^E@uxN
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mov ebx,0 ;return value PHH,vO[eO
mov eax,1 ;sys_exit ^7*zi_Q
int 80h ;kernel system call 8@FgvWC
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x86 CPU,Windows,MASM32 X&M04
.386 =C7<I
.model flat,stdcall .lSoC`HE
option casemap:none YYe=E,q
;Include 文件定义 -V'Y^Df
include windows.inc |#(y?! A^
include user32.inc cCG!X%9
includelib user32.lib 7eFFKl
include kernel32.inc ^=gN >xP
includelib kernel32.lib _+Pz~_+kS
;数据段 'PTQ
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.data 5n e&6
szCaption db 'A MessageBox!',0 | `?J2WGe
szText db 'Hello,world!',0 fK^;?4
;代码段 @$~;vS
.code JEeXoGKd
start: ))7CqN
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK bq}`jP~#
invoke ExitProcess,NULL #aE>-81SS&
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> )3 '8T>^<K
end start -O $!sFmY
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BEGIN { print "Hello, world!" } y7Hoy.(
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BASIC 8/"C0I (G
传统版BASIC(例如GWBASIC): qtz~Y~h|>
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10 PRINT "Hello, world!" kJCeQK:W
20 END {=MRJg!U
R)=){SI:1)
或在提示符输入: Ia[<;":U
py wc~dWvz
?"Hello, world!":END 7gRR/&ZK
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现代版BASIC(例如Quick BASIC): DjvPeX
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Print "Hello, world!" nJwP|P_
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以下的语句在Quick BASIC中同样有效: ~,x4cOdR#
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? "Hello,world!" $gCN[%+j
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VU+=b+B~m
BCPL nZEew.T:6
GET "LIBHDR" 5inCAPXz
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LET START () BE 1aPFpo!
$( I[n|#N
WRITES ("Hello, world!*N") ONFx -U]
$) (g1Op~EM
^E".`~R
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Befunge _.I58r
"!dlrow olleH">v `r0lu_.$]4
, ;
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^_@ &
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uII! ?
Brainfuck ~Q}!4LH
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< 9ZuKED
+++++++++++++++.>.+++.------.--------.>+.>. v<mSd2B*
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C G9@5 !-
#include <stdio.h> B[t>T>~
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int main(void) '-3K`[
{ :m>Vp
printf("Hello, world!\n"); /[n]t
return 0;
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} CZ
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C++
qq@]xdl
#include <iostream> mE&SAm5#d
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int main() G2b"R{i/,
{ 3_]QtP3
std::cout << "Hello, world!" << std::endl; r,Msg&rT
return 0; ,bP8"|e
} Rm~8n;7oOr
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C++/CLI We'= /!
int main() s4 Vju/
{ }g:'K
System::Console::WriteLine("Hello, world!"); ZP-9KA$"
} O3pd5&^g
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C# (C Sharp) !(3[z>
class HelloWorldApp rje;Bf
{ lA`-"
public static void Main() ]cMZ7V^
{ 9fOE.
System.Console.WriteLine("Hello, world!"); wB+F/]]|N
} 3}C-Hg+gt
} bL{D*\HF
v?n# C
Nz%pl!
COBOL 'Zqt~5=5
IDENTIFICATION DIVISION. zvfdfQ-i
PROGRAM-ID. HELLO-WORLD. e)3Mg^
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ENVIRONMENT DIVISION. qLw^Qxo
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DATA DIVISION. ,'sDauFn
`>RM:!m6=$
PROCEDURE DIVISION. UWdqcOr
DISPLAY "Hello, world!". ?9?o8!
STOP RUN. %CgmZTz~<
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Common Lisp -w'g0/fD
(format t "Hello world!~%") ^;?w<9Y
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dkSd
Y+Q
DOS批处理 >4HB~9dKU
@echo off oeI[x
echo "Hello, world!" nFro#qx
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Eiffel TT){15T;"
class HELLO_WORLD )ub!tm
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creation =w:H9uj6F
make ZT,auSX
feature .I>CL4_
make is HD,6
local n"R$b:
io:BASIC_IO Lf{pTxKr
do h,]lN'JG{
!!io =YtK@+| i
io.put_string("%N Hello, world!") a(h@4 x
end -- make ':utU1dL
end -- class HELLO_WORLD +RK/u
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Erlang <YWu/\{KT
-module(hello). ol_&epG;ST
-export([hello_world/0]). 3;!a'[W&p
/N@NT/.M<
hello_world() -> io:fwrite("Hello, World!\n"). mmMiA@0
=sS=
IEfm>N-]
Forth GW]t~EL
." Hello, world!" CR dp3TJZ+U
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Fortran c{T)31ldW
WRITE(*,10) F-$NoEL
10 FORMAT('Hello, World!') 48!F!v,j)x
STOP ]!@!qp@
END J.0&gP V
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F[fs^Q6S$
HTML Kke
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<HTML> +ERuZc$3,
<HEAD> paxZlA
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<TITLE> Hello World! </TITLE> BpF}H^V-
</HEAD> m^^#3*qa
<BODY> ![Vrbe P
<p>Hello World!</p> V0gu0+u~R
</BODY> W5&KmA
</HTML> lI5>d(6p
rhN"#?
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H &(20*Vn,O
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INTERCAL J!'IkC$>
PLEASE DO ,1 <- #13 >Q)S-4iR
DO ,1 SUB #1 <- #238 g
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DO ,1 SUB #2 <- #112 zXd#kw;
DO ,1 SUB #3 <- #112 YIYuqtnSJ
DO ,1 SUB #4 <- #0 e"2x!(&n(
DO ,1 SUB #5 <- #64 u5,vchZ
DO ,1 SUB #6 <- #238 d-]!aFj|U
DO ,1 SUB #7 <- #26 =e6!U5
f
DO ,1 SUB #8 <- #248 A}1:fw\Fn3
DO ,1 SUB #9 <- #168 (. ,{x)H
DO ,1 SUB #10 <- #24 [bN_0T.YI
DO ,1 SUB #11 <- #16 <H1e+l{8$
DO ,1 SUB #12 <- #158 X d&oERJj
DO ,1 SUB #13 <- #52 K%/g!t)
PLEASE READ OUT ,1 vNU[ K%U
PLEASE GIVE UP fqol-{F.V
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AgdU@&^
Java /NVyzM51V
public class Hello zG&yu0;D6
{ u 0 K1n_
public static void main(String[] args) ;ZZmX]kz,M
{
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System.out.println("Hello, world!"); &hzr(v~;
}
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} o6r
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k6_OP]
JSP ITjg]taD
<% ^ =H 10A
out.print("Hello, world!"); a#3,qp!
%> "l6Ob
COSQ
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MIXAL "K*^%{
TERM EQU 19 the MIX console device number c* )PS`]t
ORIG 1000 start address &Fch{%S>
START OUT MSG(TERM) output data at address MSG 4WQ
96|F
HLT halt execution YMn=9EUp
MSG ALF "MIXAL" ]T>YYz
ALF " HELL" x}N1Wl=8g
ALF "O WOR" &)EL%o5
ALF "LD " S,C/l1s
END START end of the program w)gMJX/0yw
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Nuva JRw)~Tg @
<..直接输出..> )/t=g
Hello, world! Uql7s:!,U
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<..或者..> %#7^b=;=
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<. 0&2&F=fOa<
// 不带换行 Wt!NLlN8
? "Hello, world!" E%)3{#.z
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// 或者 wpm $?X
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// 带换行 5VlF\-
?? 'Hello, world!' V j_z"t7q
.> d^XRkB:h
e&=T`
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OCaml [2zS@p
let main () = kL%o9=R1
print_endline "Hello world!";; w Yr M2X@
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Pascal b_oUG_B3]
program Hello; "H)D~K~*
begin z)pp{
writeln('Hello, world!'); rh(77x1|(G
end. `~ R%}ID
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Perl i>@"&
#!/usr/local/bin/perl @!Q\|
<
print "Hello, world!\n";
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-r6LndQs
gz"I=9
PHP JA^Y:@<{/
<?php 4B@L<Rl{\
print("Hello, world!"); },tn
?> [Ma
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3 e<sNU?
Vu1X@@z
Pike {@<EVw
#!/usr/local/bin/pike Kj*:G!r0.:
int main() %%k`+nK~
{ k&\ 6SK/
write("Hello, world!\n"); E3o J;E
return 0; /'>#1J|TlK
} rfc;
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\Y}nehxG@
PL/I /g]m,Y{OI
Test: procedure options(main); RU GhhK
declare My_String char(20) varying initialize('Hello, world!'); npdpKd+*K"
put skip list(My_String); 28PT19&
end Test; t0gLz
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Prolog Wq]Lb:&