“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。 Qc?W;Q+
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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》。 ",vK~m2W_
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以下是用不同语言写成的Hello World程序的几个例子: {~FPvmj&
Ada yhbU;qEG9
with Ada.Text_Io; use Ada.Text_Io; WwZ3hd
procedure Hello is X<C fy
begin /FC
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Put_Line ("Hello, world!"); ru 9@|FgAE
end Hello; +a|Q)Ob
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汇编语言 tN\I2wm
MI(#~\Y~P
x86 CPU,DOS,TASM >lQa"F=
MODEL SMALL R-NM ~gp
IDEAL +"BJjxG
STACK 100H ]>Z9K@
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DATASEG /t7f5mA
HW DB 'Hello, world!$' 'm6bfS^T
lkJxb~S
CODESEG RC1bTM
MOV AX, @data ;UpJ_y)n8\
MOV DS, AX j[A(@w"
MOV DX, OFFSET HW 1|xe'w{
MOV AH, 09H 3~3tjhw;]9
INT 21H )~R[aXkvY
MOV AX, 4C00H XLaD#J
INT 21H W3>9GY90R
END OOXSJE1
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x86 CPU,GNU/Linux,NASM cf"&22TQ+Z
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). JZxA:dg
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;Enter this into "hello.asm" then type: _^(1Qb[
;"nasm -f elf hello.asm" \rxjvV4fcZ
;"ld hello.o -o hello" bK0(c1*a[e
;"./hello" LkzA_|8:D
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section .data ;data section declaration w8Z#]kRv
msg db 'Hello World!',0AH JmR2skoV,
len equ $-msg ;string length WLj]EsA.
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section .text ;code section declaration $},XRo&R
global _start ;entry point (start of execution) 8r+u!$i!H
_start: mov edx,len ;string length `Rt w'Uz
mov ecx,msg ;string start 3]JJCaf
mov ebx,1 ;file handle: stdout 3>L5TYa
mov eax,4 ;sys_write *Us}E7/"'
int 80h ;kernel system call ~ <K,P
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mov ebx,0 ;return value vI(LIfe;
mov eax,1 ;sys_exit 1I69O6"
int 80h ;kernel system call Et}%)M
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x86 CPU,Windows,MASM32 H#YI7l2
.386 9{A4>
.model flat,stdcall T}Wbt=\M
option casemap:none 6U8esPs,
;Include 文件定义 hwe6@T.#
include windows.inc =e# h;x2
include user32.inc &W<9#RPK'
includelib user32.lib .,qh,m\Fo
include kernel32.inc DN=W2MEfc
includelib kernel32.lib G?,3Zn0
;数据段 Hk4k
.data 7w9'xY
szCaption db 'A MessageBox!',0 Wm"#"l4
szText db 'Hello,world!',0 x(Ew Hg>;
;代码段 EMr|#}]#s
.code L58H)V3Pn
start: *74/I>i
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK Y{dX[^[
invoke ExitProcess,NULL zTMLE~w
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> *^G,
end start d42Y` Wu
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AWK _\k?uUo&,^
BEGIN { print "Hello, world!" } ~QUNR?h
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BASIC Zi]E!Tgn
传统版BASIC(例如GWBASIC): Tzjv-9^V
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10 PRINT "Hello, world!" -"H$&p~
20 END k&5T-\ q
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或在提示符输入: K^"l.V#J
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?"Hello, world!":END {0,6-dd5
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现代版BASIC(例如Quick BASIC): oBub]<.J
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Print "Hello, world!" #d[Nm+~ko
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以下的语句在Quick BASIC中同样有效: 1]0;2THx
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? "Hello,world!" KCZ<#ca^
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BCPL I~~":~&
GET "LIBHDR" )
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LET START () BE ydY(*]
$( rrgOp5aV"
WRITES ("Hello, world!*N") nLk`W"irM
$) '/loJz 1
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Befunge @C=gMn.E
"!dlrow olleH">v &k_LK
, 7KUf,0D
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3
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Brainfuck ->IZZ5G<
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< i-wWbZ-
+++++++++++++++.>.+++.------.--------.>+.>. x_-V{
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C RSB+Saf.8
#include <stdio.h> &F7_0iAP(
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int main(void) _~umE/tz
{ %52x:qGa
printf("Hello, world!\n"); UYy #DA
return 0; #k d9}
} %}~(%@qB>+
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C++ G[u6X_Q
#include <iostream> Gi@c`lRd1
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int main() %Q}(.h%M
{ xf7YIhL^*
std::cout << "Hello, world!" << std::endl; WH7UJCQ
return 0; !vK0|eV3
} ,|zzq@fk
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C++/CLI (OwGp3g
int main() 5{DwD{Q
{ @6R6.i5d
System::Console::WriteLine("Hello, world!"); i+T5(P$
} sy4Nm0m
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C# (C Sharp) !:esdJH
class HelloWorldApp "s zJ[
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{ :w|=o9J
public static void Main() Sj/v:
{ &IRM<A!8
System.Console.WriteLine("Hello, world!"); o>yXEg
} glROT@
} %`lJA W[
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COBOL 1#+|RL4o
IDENTIFICATION DIVISION. 'q}f3u >
PROGRAM-ID. HELLO-WORLD. ?X\.O-=4X
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ENVIRONMENT DIVISION. #D{Eq8dp
4
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DATA DIVISION. v&]yzl
FQ47j)p;
PROCEDURE DIVISION. jr#*;go
DISPLAY "Hello, world!". 2_M+o]Z^
STOP RUN. MujEjD "|
BE~-0g$W
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Common Lisp @8A[HP
(format t "Hello world!~%") Q^@7Yg@l
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LH`2Y,E
DOS批处理 KPjAk
@echo off jk\V2x@DR
echo "Hello, world!" 4"!kCUB
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Lg#(?tMp,'
Eiffel Z6Kp-z(l3
class HELLO_WORLD lHTr7uF(
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creation cc}#-HKR[
make `GCK%evLG
feature '<1Cta`
make is [EZ=t k
local UVgSO|Tg
io:BASIC_IO W_3BL]^=
do #,XZ @u+
!!io zx.SRs$
io.put_string("%N Hello, world!") Iij$ce`nx
end -- make r{SDJa
end -- class HELLO_WORLD 87!m l
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Erlang IJDbm}:/e
-module(hello). y+{)4ptg$<
-export([hello_world/0]). )ZrB-(u~k
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Tz]8[^
hello_world() -> io:fwrite("Hello, World!\n"). fy|I3
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RQ^
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Forth W@'*G*f
." Hello, world!" CR b^ [ z'
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1~LfR
Fortran v*<rNZI
WRITE(*,10) koD}o^U#
10 FORMAT('Hello, World!') 0]=Bqyg
STOP g)|vS>^~
END [/ertB
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HTML Yw5-:w0f
<HTML> wrX n|aV
<HEAD> }_^ vvu
<TITLE> Hello World! </TITLE> 3#>%_@<
</HEAD> Qc PU{#6
<BODY> NPM2qL9&J
<p>Hello World!</p> ,\aLv
</BODY> eQn[
</HTML> ?cKTeGrS
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Y"yrc0'&T
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G#6Z@|kVw
INTERCAL KT >Y^
PLEASE DO ,1 <- #13 ?d{O'&|:
DO ,1 SUB #1 <- #238 #5'@at'1
DO ,1 SUB #2 <- #112 hdSP#Y'-
DO ,1 SUB #3 <- #112 qfxEo76'
DO ,1 SUB #4 <- #0 L%QRWhB
DO ,1 SUB #5 <- #64 LXhR"PWZM\
DO ,1 SUB #6 <- #238 `ah|BV
DO ,1 SUB #7 <- #26 "zCT S
DO ,1 SUB #8 <- #248 tLq]#9kL
DO ,1 SUB #9 <- #168 U[8F{LX
DO ,1 SUB #10 <- #24 ki/Cpfq40*
DO ,1 SUB #11 <- #16 O|^J;fS:
DO ,1 SUB #12 <- #158 >kmgYWG
DO ,1 SUB #13 <- #52 niW"o-}
PLEASE READ OUT ,1 ;$gV$KB:xA
PLEASE GIVE UP |_-w{2K
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Java M5t.l (
public class Hello *p#@W-:9E
{ [^6z>
public static void main(String[] args) Iwh0PfWJ
{ :M f8q!Q'
System.out.println("Hello, world!"); -o{ x
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} ) jvI Nb
} =NI?Jk*iAq
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&/)B d%
JSP 8"-=+w.CZ
<% HIvSpO
out.print("Hello, world!"); u U>L (
%> p|mFF0SL
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Md~._@`|K
MIXAL mU?~s7
TERM EQU 19 the MIX console device number 4 dLnX3 v
ORIG 1000 start address q5'G]j{,Z
START OUT MSG(TERM) output data at address MSG pPo(nH|<
HLT halt execution WVOj;c
MSG ALF "MIXAL" d!Gy#<H
ALF " HELL" ]7yxXg
ALF "O WOR" 3(,m(+J[S
ALF "LD " y,ub*-:
END START end of the program k`|E&+og
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Nuva vf+z0df
<..直接输出..> Hs:zfvD
Hello, world! [[6"qq
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<..或者..> RjPkH$u'Pj
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// 不带换行 r `n|fD.
? "Hello, world!" {#4a}:3
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// 或者 G
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// 带换行 6-TYOUm
?? 'Hello, world!' 1IS1P)4_0
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OCaml {f)aFGp
let main () = 5dN>Xjpu
print_endline "Hello world!";; dg|x(p#
fR'!p: ~
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Pascal |)Dm.)/0)
program Hello; !t"/w6X1I
begin {#,5C H')
writeln('Hello, world!'); t&=bW<6
end. rr1'|
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Perl 9lR6:}L7
#!/usr/local/bin/perl V;"2=)X
print "Hello, world!\n"; X';qcn_^
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PHP <PuY"-`/Oc
<?php Q<;EQb#
print("Hello, world!"); 'PY;
?> F+Qnf'at1
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3C%|src
Pike b|DU
#!/usr/local/bin/pike Sk!' 2y*@&
int main() T&>65`L
{ r"h09suZBW
write("Hello, world!\n"); Z$KyK.FUU
return 0; FZ+2{wIV^
} W,Q>3y*
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PL/I rA B=H*|6
Test: procedure options(main); wbKJ:eWgt
declare My_String char(20) varying initialize('Hello, world!'); [7gz?9VyLF
put skip list(My_String); xt pY*
end Test; GQY"
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2\k!DF
Prolog \y=28KKc:c
goal zNrn|(Y%Y
write("hello,world!"). Q5Nbu90
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Python
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#!/usr/local/bin/python JWg.0d$hM
print "Hello, world!" )z@
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REXX ,
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say "Hello, world!" Ji9o0Y R
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Ruby U!o
#!/usr/bin/ruby
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print "Hello, world!\n" 3MHpP5C
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R$
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Scheme 1
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(display "Hello, world!") !wpK
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(newline) yLfyLyO L
E Zf|>^N
9D=X3{be#
sed (需要至少一行输入) hOZTD0
sed -ne '1s/.*/Hello, world!/p' \M@IKE
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Z
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Smalltalk Tb?X KO,
Transcript show: 'Hello, world!' _$@fCo0
ineSo8| @
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SNOBOL wk8fa
OUTPUT = "Hello, world!" kjV>\e
END "'Fvt-<^S7
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SQL *#}=>, v
create table MESSAGE (TEXT char(15)); \{ QH^
insert into MESSAGE (TEXT) values ('Hello, world!'); f~P YK
select TEXT from MESSAGE; Khi6z&