“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。 l8khu)\n4R
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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》。 a^8PB|G
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以下是用不同语言写成的Hello World程序的几个例子: %!r.)Wx|2
Ada pC]XbokES
with Ada.Text_Io; use Ada.Text_Io; Re2&qxE
procedure Hello is Qvty;2$o@
begin T 5F)
Put_Line ("Hello, world!"); %fnG v\uI
end Hello; Y1ks'=c>
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汇编语言 ;80^ GDk~S
!B92W
x86 CPU,DOS,TASM {-lpYD^k3
MODEL SMALL kno[ !A7_6
IDEAL }i{qRx"4
STACK 100H O}w%$ mq
I tb_ H
DATASEG zE<Iv\Q
HW DB 'Hello, world!$' dr(-k3ex
14"+ctq
CODESEG 7{]dh+)
MOV AX, @data d@ >i=l [
MOV DS, AX 1Au+X3
MOV DX, OFFSET HW Xo:Mar
MOV AH, 09H !Sw=ns7
INT 21H OIJT~Z}
MOV AX, 4C00H v$D U
q+
INT 21H x5CMP%}d
END ?%[~J
r
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x86 CPU,GNU/Linux,NASM fZj,Q#}D
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). S43JaSw)
;Enter this into "hello.asm" then type: O,9^R
;"nasm -f elf hello.asm" J&s$Wqf
;"ld hello.o -o hello" ^vPsp?
;"./hello" d]Y;rqjue
MI'"Xzp{s
section .data ;data section declaration 4=o vm[
msg db 'Hello World!',0AH ,zdGY]$
len equ $-msg ;string length i!RfUod
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section .text ;code section declaration S2e3d
global _start ;entry point (start of execution) _3:%b6&Pz
_start: mov edx,len ;string length ]'"Sa<->
mov ecx,msg ;string start 641P)
mov ebx,1 ;file handle: stdout bU}v@Uk
mov eax,4 ;sys_write x\U[5d
int 80h ;kernel system call "V(P)_
K"x_=^,Yu*
mov ebx,0 ;return value [@ev%x,
mov eax,1 ;sys_exit 8>t,n,k
int 80h ;kernel system call ,0a_ou"P=_
b _<n]P*)
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x86 CPU,Windows,MASM32 8}m J)9<7
.386 p<{P#?4 g
.model flat,stdcall TIxOMY y
option casemap:none Eamt_/LKf
;Include 文件定义 j<P;:
include windows.inc *V%"q|L8
include user32.inc K6t"98
includelib user32.lib L2,2Sn*4i
include kernel32.inc Z3weFbCH
includelib kernel32.lib gu!!}pwV9
;数据段 $3PDe
.data pa1<=w
szCaption db 'A MessageBox!',0 $TmEVC^0
szText db 'Hello,world!',0 g{Al:}u>
;代码段 (^35cj{s
.code 8W{M}>;[9
start: HWsV_VAw}
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK =`QYy-b X
invoke ExitProcess,NULL uQKQC?w
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> (0H=f6N
end start C@6:uiT$
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t\hnnu`Pq
AWK fJ[ ^_,O
BEGIN { print "Hello, world!" } R\5,H!V9n
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BASIC `z\hQ%1!F
传统版BASIC(例如GWBASIC): . s9E
+1
A{
~D_q
10 PRINT "Hello, world!" B`Z3e%g#
20 END 0#9H;j<Op
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或在提示符输入: )0-A;X2
ea"X$<s>-
?"Hello, world!":END 1hY| XZ%qd
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现代版BASIC(例如Quick BASIC): ANFes*8j
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Print "Hello, world!" q* p
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以下的语句在Quick BASIC中同样有效: NgDhdOB
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? "Hello,world!" @W>@6E
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BCPL <E4(KE
GET "LIBHDR" Tse#{
GIM/ T4!)
LET START () BE UHZ&7jfl
$( 5_aj]"x
WRITES ("Hello, world!*N") +PjTT6
$) QQS*r}>
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Befunge miaH,hm
"!dlrow olleH">v \Nt
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, K9#kdo1 2
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Brainfuck C8|V?bL
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< X\h.@+f=
+++++++++++++++.>.+++.------.--------.>+.>. |@X^_L.!
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C '#f<wfn
#include <stdio.h> Iw`tbN
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int main(void) x"Ky_P~
{ 8M*+
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printf("Hello, world!\n"); ~a([e\~
return 0; ed,A'S=d
} T/3LJGnY
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C++ >[;W~*
#include <iostream> -wXeue},>
LL#REK|lm8
int main() &u2;S?7m
{ ,p d-hu
std::cout << "Hello, world!" << std::endl; A3a/ /e
return 0; qLmzA@Cv
} m
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C++/CLI y|6n:<o
int main() .G[/4h :.
{ G?$@6
System::Console::WriteLine("Hello, world!"); Ab@G^SLX
} NfvPE ]S
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C# (C Sharp) 61S;M8tNv
class HelloWorldApp c*)T4n[e
{ %
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public static void Main() g{Hgs
{ /TpTR-\I0
System.Console.WriteLine("Hello, world!"); s(=wG|
} $X#y9<bW
} <N vw*yA
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oVvA`}
COBOL j L|6i-?!
IDENTIFICATION DIVISION. .^wpfS
PROGRAM-ID. HELLO-WORLD. c<_%KL&R
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ENVIRONMENT DIVISION. L!cOg8Z
+Uq|Yh'Q
DATA DIVISION. 6$R9Y.s>Z
sUG!dwqqd
PROCEDURE DIVISION. 3(WijtH
DISPLAY "Hello, world!". +HS]kF H
STOP RUN. FgH7YkKrD
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;:6\w!fc
Common Lisp |`LH|6/
(format t "Hello world!~%") N{v)pu.
=LaEEL
Ek L2nI
DOS批处理 ^p3GT6
@echo off "W7|Xp
echo "Hello, world!" `WayR^ 9
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KnG7w^
Eiffel Tvx1+0Z%z
class HELLO_WORLD d6J/)nl
OD8
fn
creation aFTWzz
make Zonjk%tC
feature &*v\t\]
make is &en.
m>9,
local O&l4/RtQ\)
io:BASIC_IO |oPRP1F-;e
do N9w"Lb
!!io w)EYj+L
io.put_string("%N Hello, world!") +u$l]~St\
end -- make ]DNPG"
end -- class HELLO_WORLD ]}v]j`9m%
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Erlang hP"2X"kz&
-module(hello). OH
t)z.
-export([hello_world/0]). i\sBey ND"
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hello_world() -> io:fwrite("Hello, World!\n"). T-] {gc
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Forth d/; tq
." Hello, world!" CR cw<IL
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Cab.a)o
Fortran \BnU?z
WRITE(*,10) :c/54Ss~
10 FORMAT('Hello, World!') uBlPwb,V
STOP
(Q8!5s
END G8av5zR
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HTML 1iF=~@Nz_
<HTML> Pe_O(
<HEAD> ,jY:@<n
<TITLE> Hello World! </TITLE> yT7$6x
</HEAD> 'I$FOH
<BODY> J0!V (
<p>Hello World!</p> 1B;2 ~2X
</BODY> RcYUO*
</HTML> Rl ]x:
IJ Jp5[w
E{\CE1*
HQ9+ q<:8{Y|
H c""&He4zp
ZO<,V
O*~,L6# }
INTERCAL Z}S[fN8
PLEASE DO ,1 <- #13 #^T`vTD-
DO ,1 SUB #1 <- #238 3F;C{P!
DO ,1 SUB #2 <- #112 G&*P*f1S
DO ,1 SUB #3 <- #112 23?u_?+4i
DO ,1 SUB #4 <- #0 `>sOOA
DO ,1 SUB #5 <- #64 D{+@ ,C7B
DO ,1 SUB #6 <- #238 a3yNd
DO ,1 SUB #7 <- #26 <\#'o}
DO ,1 SUB #8 <- #248 UePkSz9EU
DO ,1 SUB #9 <- #168 d"FB+$
DO ,1 SUB #10 <- #24 G0
)[(s
DO ,1 SUB #11 <- #16 LzU'6ah';5
DO ,1 SUB #12 <- #158 E
f\|3D_
DO ,1 SUB #13 <- #52 ^2kjO/
PLEASE READ OUT ,1 c e;7
PLEASE GIVE UP lx|Aw@C3~
R%jOgZG
[D~]
Java >?@5>wF
public class Hello
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{ aGbG@c8PRi
public static void main(String[] args) 5SY%B#;5G
{ n[jXqFm!`
System.out.println("Hello, world!"); "u6pl);G
} F*KQhH7Gf
} 7ui<2(W@0
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HA0!>_I dC
JSP Jw]!x1rF~
<% W:i Q&[f
out.print("Hello, world!"); $}&a*c>
%> c]M+|R5
cpOt?XYR~
_WZx].|A=
MIXAL g7zl5^o3j
TERM EQU 19 the MIX console device number $]DuO1H./
ORIG 1000 start address G=cRdiy`C
START OUT MSG(TERM) output data at address MSG t<v.rb
HLT halt execution :`N&BV
MSG ALF "MIXAL" 5=?P6I_$G
ALF " HELL" hQ|mow@Zmz
ALF "O WOR" 5k0iVpjQ
ALF "LD " xrg"/?84
END START end of the program "B3jq^
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i6#*y!3{
Nuva SMZ*30i
<..直接输出..> 1X)#iY
Hello, world! Tksv7*5$
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Q?{"
<..或者..> rnK]3Ust
Wr[LC&
<. x Q"uC!Gu4
// 不带换行 !gkr?yhE
? "Hello, world!" A;d@NOI#,K
WHE<E
rV%
// 或者 NMkP#s7.y
]'pfw9"f~
// 带换行 8w:ay,=
?? 'Hello, world!' Tr?p/9.m
.> D|zuj]
6,=Z4>
4np2I~ !
OCaml ) f~;P+
let main () = }`w(sec:3
print_endline "Hello world!";; |m-N5$\IC
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OL\-SQ&
Pascal A-r;5?S
program Hello; &oMEz 0
begin i431mpMa
writeln('Hello, world!'); #2^0z`-\_z
end. F${sEtH
Qf_N,Bq{a
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Perl ya2sS9^T[
#!/usr/local/bin/perl 4XAB_Q
print "Hello, world!\n"; `/WxEu3
C|]c#X2t3
VrW]|jIu*
PHP }uDpf0;^
<?php F$8:9eL,T
print("Hello, world!"); 3Ws (],Q
?> ~3s?.[}d
^KbR@Ah
(3N/DY1/
Pike 5J`w8[;
#!/usr/local/bin/pike %X_A# 9
int main() XuP%/\
{ 3N > V
sl
write("Hello, world!\n"); W"%n5)
return 0; . gy:Pl]w
} {mU%.5
@]Vcl"t
jga;q
PL/I |}d^lQ9
Test: procedure options(main); B*G]Dr)e
declare My_String char(20) varying initialize('Hello, world!'); QuS=^,]
put skip list(My_String); 9po=[{Bp
end Test; {e&fB