“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。 n(-XI&Kn
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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》。 dAohj
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以下是用不同语言写成的Hello World程序的几个例子: O" n /.`
Ada P#"vlNa
with Ada.Text_Io; use Ada.Text_Io; %F1 Ce/
procedure Hello is 7teg*M{
begin ]@>bz
Put_Line ("Hello, world!"); ]`]m41+w
end Hello; cD]{ Nn
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汇编语言 DYbkw4Z,
3>/Yku)t
x86 CPU,DOS,TASM h5.u W8
MODEL SMALL 8BC}D+q
IDEAL !Vv$
STACK 100H zd"o #(sv
~{oM&I|d8
DATASEG -0Y8/6](
HW DB 'Hello, world!$' {>>f5o3
]hN%~
~$>
CODESEG A1>R8Zuhy
MOV AX, @data {}{|trr-E
MOV DS, AX oF)+f4
MOV DX, OFFSET HW / IAK'/
MOV AH, 09H { ~FYiX
INT 21H GS4!c8>
MOV AX, 4C00H \KDOI 7
INT 21H |'b=xeH.^<
END jW"C: {Ol;
NA !;#!
D 0\
x86 CPU,GNU/Linux,NASM jvCk+n[
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). UACWs3`s+
;Enter this into "hello.asm" then type: pX*Oc6.0mu
;"nasm -f elf hello.asm" kce+aiv|u
;"ld hello.o -o hello" Dm"GCV
;"./hello" E;9SsA
7YkxIzE
section .data ;data section declaration n<y!@p^X
msg db 'Hello World!',0AH I(
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len equ $-msg ;string length J'.U+XU
S_ e }>-
section .text ;code section declaration V<?t(_Y
global _start ;entry point (start of execution) sq\oatMw[
_start: mov edx,len ;string length j^ex5A.&
&
mov ecx,msg ;string start /@Y/(+DE
mov ebx,1 ;file handle: stdout O. V!L
mov eax,4 ;sys_write O5LB&s
int 80h ;kernel system call [D^KM|I%+
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mov ebx,0 ;return value 7P.C~,+D%P
mov eax,1 ;sys_exit YSs9BF:a
int 80h ;kernel system call lX;2~iW{/
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xW#r)aN]p
x86 CPU,Windows,MASM32 W{?7Pn?1`
.386 *R0Ae 4
.model flat,stdcall 8 U B?X
option casemap:none =VH, i/@
;Include 文件定义 9Psy$
include windows.inc m+s^K{k}
include user32.inc htq#( M
includelib user32.lib KaZ$!JfT
include kernel32.inc 3z!\Z[
includelib kernel32.lib BJ @tUn
;数据段 w`UB_h#Bl
.data 8m2-fuJz
szCaption db 'A MessageBox!',0 =ugxPgn
szText db 'Hello,world!',0 RL[?&L$7^%
;代码段 ?sdVd
.code tz6d}$
start: ~ubGx
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK )R<hYd
invoke ExitProcess,NULL ezY
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;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> bN8GRK )
end start kViX FPW
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BEGIN { print "Hello, world!" } > 't=r
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BASIC 4Sf v
传统版BASIC(例如GWBASIC): e@Q<hb0<eU
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10 PRINT "Hello, world!" 0-oR
{
{
20 END AL>*Vj2h/n
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或在提示符输入: [ft#zxCJ
,q] Wi#
?"Hello, world!":END S2HGf~rE
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现代版BASIC(例如Quick BASIC): 1l"A7
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Print "Hello, world!" k`F$aQV9`
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以下的语句在Quick BASIC中同样有效: )F,H(LblH
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? "Hello,world!" zZ3,e L
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DK}k||-
BCPL Hc ]/0:
GET "LIBHDR" K{%}kUj>
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LET START () BE H-K,Q%;C@
$( ;H9d.D8
WRITES ("Hello, world!*N") ]j(2FM)#
$) BSY2\AL p
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k-@CcrepF
Befunge TPZZln'3
"!dlrow olleH">v ,[71,zs
, ,a9<\bd)
^_@ Vv~rgNh
,^3eMn
{s6;6>-kPW
Brainfuck Iw(deD
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< [cv7s=U%
+++++++++++++++.>.+++.------.--------.>+.>. (%ra~s?
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-o#HO_9
C $?YRy_SI
#include <stdio.h> T^x7w+
!j#Z48=&
int main(void) UQgOtqL3
{ WBFG_])
printf("Hello, world!\n"); u>Z;/kr
return 0; QKDY:1]
} o>mZ$
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C++ qOVs9'R
#include <iostream>
O;h ]
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int main() ,R5NKWo
{ <7fF9X
std::cout << "Hello, world!" << std::endl; ]1>U@oK
return 0; x48Y#"'
} L:"i,K#P
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C++/CLI Ml1yk)3G
int main() -g(&5._,ZW
{ uh*b[`e
System::Console::WriteLine("Hello, world!"); E}sjl
} <"Z]S^>$
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C# (C Sharp) :[z=u
class HelloWorldApp KY9sa/xO
{ fo9O+e s
public static void Main() F/sXr(7
{ NWd%Za5K;
System.Console.WriteLine("Hello, world!"); +VE }c
} qMD 6LWJ
} *T'
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COBOL PXof-W
IDENTIFICATION DIVISION. h4N!zj[
PROGRAM-ID. HELLO-WORLD. o65:)z
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ENVIRONMENT DIVISION. %B5.zs]Of
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DATA DIVISION. [h SE^
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Q]9H9?}N?
PROCEDURE DIVISION. fz#e4+oH
DISPLAY "Hello, world!". R
h zf.kp
STOP RUN. vU0j!XqE
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Oaf!\z}
Common Lisp I9O!CQCTt
(format t "Hello world!~%") +O>!x#)&"
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s1.YH?A;
DOS批处理 `W,gYH7
@echo off 6AV@O
echo "Hello, world!" KoVy,@
]BGWJ A5
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Eiffel m,NUNd#)\
class HELLO_WORLD j3jf:7 /\
sJo]$/?F
creation ,Q!sns[T
make k0~mK7k
feature &0Yv*,4]
make is ]v j=M-:+
local NKf][!bi
io:BASIC_IO 6KC.l}Y*
do Dn{
hU$*
!!io @tv3\eD
io.put_string("%N Hello, world!") ]O%wZIp\P
end -- make qg521o$*
end -- class HELLO_WORLD 50MdZ;R-3
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Erlang !~X[qT
-module(hello). l#40VHa?S
-export([hello_world/0]). BS-nn y
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hello_world() -> io:fwrite("Hello, World!\n"). "ecG\}R=
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Forth ~Sq!P
." Hello, world!" CR _<;;CI3w
2|="!c8K
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Fortran m}t.E
WRITE(*,10) l,z#
:k
10 FORMAT('Hello, World!') BGk>:Z`
STOP IZr~h9
END
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N0Y$QWr_$
HTML R^_7B(
<HTML> G)ppkH`qj
<HEAD> rL{3O4O
<TITLE> Hello World! </TITLE> $!~R'N c
</HEAD> YH_mWN\Wu
<BODY> +>zjTP7\e"
<p>Hello World!</p> r>!$eqX_
</BODY> f9+J}
</HTML> uc.dtq!
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HQ9+ Z*AT &7
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U8f!yXF'
li!3bv
INTERCAL nRP|Qt7>
PLEASE DO ,1 <- #13 DC&3=Nd
DO ,1 SUB #1 <- #238 :K:oH}4oh
DO ,1 SUB #2 <- #112 {P'_s]B)
DO ,1 SUB #3 <- #112 Yf=an`"
DO ,1 SUB #4 <- #0 goE \C
DO ,1 SUB #5 <- #64 SJseP_-
DO ,1 SUB #6 <- #238 kIC$ai6.
DO ,1 SUB #7 <- #26 cst}/8e
DO ,1 SUB #8 <- #248 h/)kd3$*'
DO ,1 SUB #9 <- #168 JJIlR{WY_
DO ,1 SUB #10 <- #24 UR3qzPm!0e
DO ,1 SUB #11 <- #16 jTR>H bh
DO ,1 SUB #12 <- #158
11'^JmKA
DO ,1 SUB #13 <- #52 cO8':P5Q
PLEASE READ OUT ,1 =:w]EpH"
PLEASE GIVE UP {7'Evfn)
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Java lx'^vK% F
public class Hello Po)!vL"
{ e9LP!"@EY
public static void main(String[] args) '-,$@l#
{ Io(*_3V)B
System.out.println("Hello, world!");
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} |w{}h6a
} @5["L
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JSP -ho%9LW%|
<% `{Jo>L.
out.print("Hello, world!"); 2l4*6rYa(
%> 8gHOs#\
RXi/&'+H
[$Dzf<0
MIXAL 8opd0'SNaB
TERM EQU 19 the MIX console device number mTj?W$+r
ORIG 1000 start address n@JZ 2K4
START OUT MSG(TERM) output data at address MSG CE|iu!-4
HLT halt execution |zkZF|-
MSG ALF "MIXAL" qk{+Y
ALF " HELL" L0Ycf|[s,
ALF "O WOR" {vhP'!a6W
ALF "LD " *QGyF`Go{
END START end of the program nI
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= pCO1<wR
Nuva Hrg~<-.La
<..直接输出..> ${F4x "x
Hello, world! 8Y,imj\(v
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3
<..或者..> ?;YymD_
r$cq2pkX
<. E]0}&YG
// 不带换行 W7` fI*lc
? "Hello, world!" '@{Mq%`
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// 或者 lDX\"Fq
p.|M:C\xL
// 带换行 >]}c,4D(
?? 'Hello, world!' 5hvg]w95;
.> y,xJ5BI$
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>X_5o^s2s
OCaml tJvs
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let main () = YHOo6syk
print_endline "Hello world!";; ,<t)aZL,A;
O63:t$Yx#
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Pascal fZgEJsr
program Hello; \(&UDG$
begin $4:Se#nl
writeln('Hello, world!'); c0v6*O)
end. >pm`(zLn
gZ>)
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Perl IBz)3gj J
#!/usr/local/bin/perl =mYwO=:D
print "Hello, world!\n"; IKVFbTX:y
@q"HZO[
A&S n^mw
PHP ;J,`v5z0:
<?php *TgD{>s
print("Hello, world!"); A4daIhP
(
?> dT7!+)s5-
>zo_ }A!
o/hj~;(]
Pike lw43|_'G-t
#!/usr/local/bin/pike w_P2\B^
int main() l.xKv$uOGR
{ P?hB`5X
write("Hello, world!\n"); Wi@YJ
return 0; _>E=.$
} ML.|\:r*
!;Vqs/E
Al+}4{Q+?
PL/I ,Bs/.htQj
Test: procedure options(main); <~zPt&C]V
declare My_String char(20) varying initialize('Hello, world!'); 2j&0U!DX
put skip list(My_String); # TZ`
end Test; DN;|?oNZ
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cHC4Y&&uZ
Prolog 3qkPe_<I
goal G_`Ae%'h
write("hello,world!"). H.<