“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。 =
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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》。 K!D!b'|bb
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以下是用不同语言写成的Hello World程序的几个例子: K9O,7h:x
Ada FDd>(!>
with Ada.Text_Io; use Ada.Text_Io; [gh[F
procedure Hello is LXu"rfp
begin KkL:p?@n
Put_Line ("Hello, world!"); ]1|Ql*6y,
end Hello; nL(%&z \4
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汇编语言 E%\7Uo-
w]Ko/;;^2
x86 CPU,DOS,TASM 90h1e7ZcC
MODEL SMALL azDC'.3{p
IDEAL ^Im%D(MY
STACK 100H n:^"[Le
5ih"Nds[H
DATASEG HMS9y%zl/
HW DB 'Hello, world!$' :OQ:@Yk
#C,f/PXfaB
CODESEG bu"68A;>
MOV AX, @data ic0v*Y$
MOV DS, AX ZYA.1VrM
MOV DX, OFFSET HW 7=p-A_X
MOV AH, 09H 'D0X?2
INT 21H R|)2Dg
MOV AX, 4C00H |N=@E,33
INT 21H [
4Y
`O
END `k}l$ih`X
e9Ul A
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x86 CPU,GNU/Linux,NASM BvZ^^IUb
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). ~
S?-{X+
;Enter this into "hello.asm" then type: h\u0{!@}
;"nasm -f elf hello.asm" qzHqj;
;"ld hello.o -o hello" .KU SNrs'
;"./hello" rTsbP40
Zu0;/_rN
section .data ;data section declaration 5e/qgI)M5
msg db 'Hello World!',0AH l@tyg7CwY
len equ $-msg ;string length MCi` TXr
ZH;y>Z
section .text ;code section declaration kToVBU$
global _start ;entry point (start of execution) @`kiEg'Q
_start: mov edx,len ;string length xf^<ec
mov ecx,msg ;string start )p!*c,
mov ebx,1 ;file handle: stdout aZawBU.:
mov eax,4 ;sys_write yA?ENAM
int 80h ;kernel system call e\A(#l@g
2%{YYT
mov ebx,0 ;return value hM36QOdm
mov eax,1 ;sys_exit `z?KL(rI
int 80h ;kernel system call =,AC%S_D~
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hLyTUt~\L
x86 CPU,Windows,MASM32 r{q}f)
.386 Q9yGQu
.model flat,stdcall _Vo)<--+I
option casemap:none 'Wf?elB+
;Include 文件定义 1A?\BJ"
include windows.inc oxMUW<gYd
include user32.inc aW=By)S!Y
includelib user32.lib kh<pLI >$h
include kernel32.inc yWv<A^C&
includelib kernel32.lib CCW%G,$U9
;数据段 )@<HCRQ'q
.data pyg!rf-
szCaption db 'A MessageBox!',0 &PRx,G5
szText db 'Hello,world!',0 F%PwIB~cy
;代码段 TDAWI_83-
.code a)_rka1(
start: X/E7o92\
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK o9m
invoke ExitProcess,NULL tIGVB+g{F
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> w\o)bn
end start +
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pwFU2}I
AWK FpdDIa
BEGIN { print "Hello, world!" } ]3O
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BASIC f=:3! k,S
传统版BASIC(例如GWBASIC): E7X!cm/2<
m/YH^N0
10 PRINT "Hello, world!" >:F,-cx<
20 END VG<Hw{ c3r
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或在提示符输入: * MSBjH|
}A4nJ>`tq
?"Hello, world!":END i\=z'
SUH mBo"}
现代版BASIC(例如Quick BASIC): o~v_PD[S
:W.jNV{e\F
Print "Hello, world!" 0T9@,scY
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以下的语句在Quick BASIC中同样有效: ex`
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? "Hello,world!" /OQK/
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:vc[/<
~9JW#HHzn
BCPL |'V DI]p&
GET "LIBHDR" O!+nF]V4f
~lzdbX
LET START () BE lQV|U;~D
$( ]ZzoJ7lr
WRITES ("Hello, world!*N") uQGz;F x
$) u(pdP"
\C]i|]tl
H+4=|mkQ
Befunge _\
.
"!dlrow olleH">v <u/a`E?
, _4P;+Y
^_@ U/T4i#
xT9Yes&
''#p47$8<d
Brainfuck ?mH@`c,fM
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< ],;D2]<s
+++++++++++++++.>.+++.------.--------.>+.>. p+, 1Fi
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C hc-lzYS
#include <stdio.h> /635B*g
r1i$D
int main(void) F,*2#:Ki
{ 28nmQ
printf("Hello, world!\n"); Gs[Vu@*
return 0; cCM
j\H@
} Wgxn`6
/ Zo~1q
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C++ W8f`J2^"M
#include <iostream> G/v|!}?wG
ds-
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int main() eYJ{LPo
{ _h0-
std::cout << "Hello, world!" << std::endl; <"*"1(wN
return 0; ZhH+D`9
} mfXD1]<.
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C++/CLI +"'F Be
int main() ]]>nbgGn#
{ tf4*R_6;1$
System::Console::WriteLine("Hello, world!"); ecn}iN
} LO"_NeuL
B;VH `*+X
>&bv\R/
C# (C Sharp) )T>8XCL\}
class HelloWorldApp 82lr4
{ $Axng
J c
public static void Main() <5dH *K
{ x+4vss
System.Console.WriteLine("Hello, world!"); \CcmePTN#x
} (nGkZ}p
}
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7
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Osnyd+dJY
COBOL E]NY
(1
IDENTIFICATION DIVISION. f%c06Un=
PROGRAM-ID. HELLO-WORLD. "X`RQ6~]>
{={^6@
ENVIRONMENT DIVISION. P3G:th@j=
zVdKYs i^
DATA DIVISION. &]w#z=5SXi
x8Q~VVZr
PROCEDURE DIVISION. l$F_"o?&S@
DISPLAY "Hello, world!". MFv
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STOP RUN. VSh !4z1
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Y+FP
Common Lisp qYx!jA]O
(format t "Hello world!~%") @|Dm E!)
pjACFVMFX
zt?h^zf}
DOS批处理 (#oYyM]
@echo off 2xDQ:=ec
echo "Hello, world!" d>&\V)E
-TgUyv.
^\MhT)x
Eiffel Yt{ji
class HELLO_WORLD T)8p:}P!
@:
Z#E[N H
creation {ih:FcI
make L_^`k4ct
feature 6z Ay)~
make is Jz0K}^Dj[
local N r<9u$d9=
io:BASIC_IO TFO74^
do V7:\q^$
!!io r&SO:#rOSM
io.put_string("%N Hello, world!") !nwbj21%
end -- make SZ/(\kQ6
end -- class HELLO_WORLD \*uugw,\y
bhYU5I 9
ha5e(Hj?
Erlang glx2I_y
-module(hello). ]oEQ4
-export([hello_world/0]). mbyih+amCr
;Z*'D}
hello_world() -> io:fwrite("Hello, World!\n"). yxvjg\!&
PcB{=L
`NQ{)N0!
Forth DcN"=Y
." Hello, world!" CR 'j }g
_%%yV
FuuS"G,S
Fortran %*jGim~s
WRITE(*,10) `gI~|A4
10 FORMAT('Hello, World!') &mcR
STOP S;8. yj-
END 6}ftBmv
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';6X!KY+]
HTML q[P~L`h S
<HTML> .Vmtx
<HEAD> +8f>^*:u
<TITLE> Hello World! </TITLE> ~T 02._E
</HEAD> +`| mJa
<BODY> =:gjz4}_8
<p>Hello World!</p> Ir27ZP
</BODY> )pS8{c)E
</HTML> g2=}G <*0
\-OC|\{32
0R|K0XH#$
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H D-pX<0-y
p.C1 nh
cz#_<8'N
INTERCAL Fj^AWv^/
PLEASE DO ,1 <- #13 &hI>L
DO ,1 SUB #1 <- #238 333u]
DO ,1 SUB #2 <- #112
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DO ,1 SUB #3 <- #112
4{Udz!
DO ,1 SUB #4 <- #0 9 #Y2`pT
DO ,1 SUB #5 <- #64 ;g9% &
DO ,1 SUB #6 <- #238 E?Cj/o
DO ,1 SUB #7 <- #26 n+?-
DO ,1 SUB #8 <- #248 :_Fxy5}
DO ,1 SUB #9 <- #168 #W|!fILL
DO ,1 SUB #10 <- #24 IBET'!j4"
DO ,1 SUB #11 <- #16 WYLX?x
DO ,1 SUB #12 <- #158 >)^NJ2Fd
DO ,1 SUB #13 <- #52 <Y>3
PLEASE READ OUT ,1 ,eXFN?CB
PLEASE GIVE UP W`x)=y]Z
1~@|eWr|
RM,'o[%
Java > rw"Rd'
public class Hello OR;&TbWF(R
{ _R74/|
public static void main(String[] args) p+[}Hxx=
{ >A($8=+#x
System.out.println("Hello, world!"); Nd!c2`
} '#H")i
} \XS]N_}8>
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qlUzr.^-
JSP B+46.bIH
<% %ek"!A
out.print("Hello, world!"); h<Wg 3o
%> ,QvYTJ{
F\LsI;G
TatMf;?h&
MIXAL ~<,Sh~Ana.
TERM EQU 19 the MIX console device number H&bh<KPMh
ORIG 1000 start address C3}Aq8$6
START OUT MSG(TERM) output data at address MSG yp+F<5o
HLT halt execution P}@*Z>j:#
MSG ALF "MIXAL" N09KVz2Q
ALF " HELL" =dGKF`tR
ALF "O WOR" s}(X]Gx1
ALF "LD " ~ziexZ=N
END START end of the program 8l23%iWxe
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Nuva GV8)Kor%
<..直接输出..> kA^A mfba
Hello, world! {|6z+vR
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<..或者..> 5B*qbM
o&$hYy"<.L
<. fHfY}BQS
// 不带换行 y5u\j{?Te
? "Hello, world!" |I^y0Q:K
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// 或者 {mSJUK?TKl
8lwM{?k$
// 带换行 dy:d=Z
?? 'Hello, world!' _Adsq8sFW
.> p{.8_#O%S
d>!p=O`>{q
{/ &B!zvl
OCaml 5v9uHxy
let main () = S}7>RHe
print_endline "Hello world!";; RmO yGSO
4seciz0?
Rp/-Pv
Pascal -H\,2FO
program Hello; *Jt8
begin ?9e]
writeln('Hello, world!'); }bMWTT
end. 2xTT)9Tq*
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V@Wcb$mgk
Perl #DUh(:E'`
#!/usr/local/bin/perl |C D}<r(N
print "Hello, world!\n"; r)b<{u=]
{?i)K X^
D{C:d\ e)$
PHP C) .2gQ
G
<?php ce' TYkPM
print("Hello, world!"); Km*<Kfcz
?> lIh[|]
7Fl-(Nv`
"H1:0p
Pike Ei~f`{i
#!/usr/local/bin/pike QlD6i-a
int main() ~lw<799F6
{ ow.j+<M
write("Hello, world!\n"); oT3Y!Y3=<
return 0; #C\4/g?=,
} / Z!i;@Wf
D$nK`r
K"l0w**Og#
PL/I @\}YAa>>"I
Test: procedure options(main); @ Nb%L&=P8
declare My_String char(20) varying initialize('Hello, world!'); l h/&__
put skip list(My_String); M<[?g5=#
end Test; CgnXr/!L
%MJ;Q?KB
"^%Z'ou
Prolog (p |DcA]BX
goal h\y-L~2E
write("hello,world!"). ut5yf$%
\L[i9m| e
VPd,]]S5(
Python &iSD/W
#!/usr/local/bin/python (
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print "Hello, world!" 6vp0*ww
\!H{Ks{#R.
B*@6xS[IL
REXX ~m`!;rE
say "Hello, world!" A/ 0qk
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dWR1cvB(wY
Ruby HomN/wKh
#!/usr/bin/ruby i&K