“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。 Ufo>|A6;$
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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》。 u)Q;8$`
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以下是用不同语言写成的Hello World程序的几个例子: NHw x:-RH
Ada gM>=%/.
with Ada.Text_Io; use Ada.Text_Io; `ya;:$(6
procedure Hello is SbsouGD,{
begin IfDx@ ?OB
Put_Line ("Hello, world!"); 4c~>ci,N?(
end Hello; PiLJZBUv
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汇编语言 :9l51oE7
DhI>p0* T
x86 CPU,DOS,TASM K:yr-#(P/
MODEL SMALL %'L;FPxB
IDEAL d0er^ ~
STACK 100H ly4Qg\l
ZF#Rej?
DATASEG lS{r=y_0.
HW DB 'Hello, world!$' >s*Drf X6
Y9 r3XhVI
CODESEG }0=<6\+:`
MOV AX, @data eukA[nO7G
MOV DS, AX ARh6V&Hi-
MOV DX, OFFSET HW *QE<zt
MOV AH, 09H S+x_c4 T
INT 21H 6k])Kl J2;
MOV AX, 4C00H Zu<]bv
INT 21H (7$$;
END #Gv{UU$]
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x86 CPU,GNU/Linux,NASM Y'"N"$n'_
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). ~krS#\
;Enter this into "hello.asm" then type: ?~ULIO'
;"nasm -f elf hello.asm" cep$_Ja
;"ld hello.o -o hello" ~waNPjPRG
;"./hello" M<8ML!N0;t
)JgC$ <
section .data ;data section declaration -rY 7)=
msg db 'Hello World!',0AH ?{J!#`tfV
len equ $-msg ;string length :.IN?X
}VRvsZ
section .text ;code section declaration 9zKBO* p`
global _start ;entry point (start of execution) O+.*lo
_start: mov edx,len ;string length QocQowz
mov ecx,msg ;string start D$Kea
mov ebx,1 ;file handle: stdout W3pQ?
mov eax,4 ;sys_write #V 43=
int 80h ;kernel system call gT1P*N;v
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mov ebx,0 ;return value jMpa?Jp 1
mov eax,1 ;sys_exit SN]LeXesS
int 80h ;kernel system call ,jh~;, w2
*v #/Y9}
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x86 CPU,Windows,MASM32 Dm{Ok#@r2
.386 K84&sSi
.model flat,stdcall OeTu?d&N
option casemap:none Y)p4]>lT+8
;Include 文件定义 `1'5j "v
include windows.inc SPwPCI1?
include user32.inc F1u)i
includelib user32.lib jUY+3"?
include kernel32.inc <f%/px%1
includelib kernel32.lib L$JI43HZ
;数据段 v}`1)BUeF
.data #( uj$[o
szCaption db 'A MessageBox!',0 %Y',|+Arx
szText db 'Hello,world!',0 3V-6)V{KaE
;代码段 %8D?$v"#Z
.code b(T@~P/
start: ^5)_wUf
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK w~-X>~ }
invoke ExitProcess,NULL {8m1dEC^@Q
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> ^
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end start l{EU_|q
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AWK &z ksRX
BEGIN { print "Hello, world!" } 5c;En6W
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BASIC oFyeH )!
传统版BASIC(例如GWBASIC): H-a^BZ&iU
r<_2qICgP
10 PRINT "Hello, world!" b`]M|C [5
20 END *<dHqK`?C
u+DX$#-n!]
或在提示符输入: !3x*k;0
9HKf^+';n
?"Hello, world!":END 3kw}CaZ6
sRi %1r7
现代版BASIC(例如Quick BASIC): \^s2W:c
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Print "Hello, world!" u:5IjOb2^
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以下的语句在Quick BASIC中同样有效: )[
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wT%"5:
? "Hello,world!" A;t
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uQ1jwYK`7
-$L(y@%X^
BCPL X7&U3v
GET "LIBHDR" L]>4Nd
xN"wF-s4?
LET START () BE w`Xg%*]}
$( ^BNp`x;;`
WRITES ("Hello, world!*N") ?%;B`2 nDR
$) L5C2ng>
w .l|G,%=
g-eq
Befunge j`Nh7+qs
"!dlrow olleH">v x/_dW
, \bRy(Z)
^_@ Zly-\z_
tx)OJY
' 3VqkQ4
Brainfuck [yvt1:q
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< Un\Ubqi0
+++++++++++++++.>.+++.------.--------.>+.>. d/4ubf+$k
kU(kU2u%9
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C j`hNZ %a
#include <stdio.h> 1^tSn#j
QSv^l-<
int main(void) }M?|,N6
{ p4y6R4kyT
printf("Hello, world!\n"); ]*a@*0=
return 0; ]qMH=>pOsj
} iA&oLu[y3
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C++ (<
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#include <iostream> ,,Jjr[A_j
xg{VP7
int main() 7^&lbzVbm(
{ e"lD`*U8R
std::cout << "Hello, world!" << std::endl; )G^p1o;\
return 0; p8$\uo 9YQ
} :wSJ-\'$
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C++/CLI n$IWoIdbGN
int main() 5"$e=y/
{ cl@kRX<7'
System::Console::WriteLine("Hello, world!"); 3_C98ClE
} Tw}@+-
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;,mBT[_ZO
C# (C Sharp) "IOC[ #&G
class HelloWorldApp 1bT'u5&
{ sE^ns\&QP=
public static void Main() h\/^Aa0
{ !NILpimi
System.Console.WriteLine("Hello, world!"); }Q,(u
} M\9at\$
} (6e!09P&
t) ;
PG\\V$}A(
COBOL qw6EP C
IDENTIFICATION DIVISION. A J<iM)l|
PROGRAM-ID. HELLO-WORLD. u![4=w
O)Xd3w'
ENVIRONMENT DIVISION. u4go*#
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DATA DIVISION. BT&rp%NO6l
5wT',U"+
PROCEDURE DIVISION. t^`<*H
DISPLAY "Hello, world!". zf M<x,XdY
STOP RUN. rd|@*^k
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4eD.
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Common Lisp /&~nM
(format t "Hello world!~%") NvXj6U*%
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]$* $0
DOS批处理 .q
AQPL
@echo off e-nWD
echo "Hello, world!" Rh wt<
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i n[n Aa
Eiffel 9itdRa==
class HELLO_WORLD dL1~]Z
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_Ym&UY.u#
creation *O"%tp6
make ^G]KE8
feature M>`?m
L
make is DR.3
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local MsN2A6|33
io:BASIC_IO Z\ "Kd
do 9OrA9r
!!io FE$M[^1_
io.put_string("%N Hello, world!") m]+X}|
end -- make 9'L1KQ
end -- class HELLO_WORLD ^N*pIVLC
=Bcux8wA#6
5^G7pI7
Erlang ` 4s#5g
-module(hello). eZa3K3^
-export([hello_world/0]). n?TO!5RZK
)W_ Y3M,
hello_world() -> io:fwrite("Hello, World!\n"). Y/?DSo4G
{[(W4NAlH
@LwVmR |{
Forth OF<[Nh\.
." Hello, world!" CR mvW^P`nB
cOj +}Hz58
,d/CU
Fortran K-g=td/@
WRITE(*,10) Rx_,J%0Fq
10 FORMAT('Hello, World!') %j
9vX$Hj
STOP J.CZR[XF#
END 8ESkG
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)VSGqYr#
HTML X:zyzEhS
<HTML> AR[M8RA
<HEAD> 7+A-7ci
<TITLE> Hello World! </TITLE> (>)+;$Dr,\
</HEAD> <9MQ
<BODY> t&p:vXF2
<p>Hello World!</p> V.E.~<7D\
</BODY> MRxo|A{
</HTML> <7RkM
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HQ9+ s]V{}bY`
H k^vmRe<lk
zL[U;
@N:3`[oB
INTERCAL QKL]O*
PLEASE DO ,1 <- #13 QVA!z##
DO ,1 SUB #1 <- #238 HjETinm"
DO ,1 SUB #2 <- #112 }!J/ 9WKgU
DO ,1 SUB #3 <- #112 |~T+f&
DO ,1 SUB #4 <- #0 KlSY^(kHR
DO ,1 SUB #5 <- #64 '
m#Ymp
DO ,1 SUB #6 <- #238 '&o>
%V
DO ,1 SUB #7 <- #26
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DO ,1 SUB #8 <- #248 X~/9Vd g
DO ,1 SUB #9 <- #168 J3!k*"P
DO ,1 SUB #10 <- #24 vr]dRStr
DO ,1 SUB #11 <- #16 5"Xo R)
DO ,1 SUB #12 <- #158 6b1 Uj<
DO ,1 SUB #13 <- #52 Q=9VuTE
PLEASE READ OUT ,1 EzY
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PLEASE GIVE UP fh5^Gd~
s*A|9uf5
;tIIEc
Java 0$dY;,Q .
public class Hello 'rcsK
{ E`Zh\u)
public static void main(String[] args) 5E!|on
{ a6K$omu
System.out.println("Hello, world!"); 4QN6BZJ5
} C J}4V!;|
} =*O9)$b
70 DQ/b
j(2tbWg9-
JSP $F==n4)
<% E<.{
v\
out.print("Hello, world!"); #xE>]U
%> kv`3Y0R-"
!&<Wc^PG
Ub-k<]yZ
MIXAL (j\UoKLRt
TERM EQU 19 the MIX console device number TuT=
ORIG 1000 start address m]b.P,~v
START OUT MSG(TERM) output data at address MSG )Z`viT
HLT halt execution Pp" )hFx
MSG ALF "MIXAL" YJ;a{)e
ALF " HELL" ]{ l
O
ALF "O WOR" gcY~_'&u
ALF "LD " iS^^Z ZyR
END START end of the program Zi '8~iEH
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Nuva pLFL6\{g
<..直接输出..> [;\<
2 =H
Hello, world! DL/*t.)"et
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<..或者..> >w'?DV>u|
P)
0=@{(
<. zj0pP{y
// 不带换行 4rCqN.J
? "Hello, world!" hB1 iSm
dXy"yQ>{
// 或者 vt7C
;
yC`5
// 带换行 eFI9S.6
?? 'Hello, world!' A&|(%
.> 5^R#e(mr
F;l<>|vG
J};,%q_
OCaml p~VW3u]
let main () = #hiDZ>nr
print_endline "Hello world!";; 1+[|pXT}
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g{.@|;d<p
Pascal [IX!3I[J]
program Hello; 9S`b7U=P
begin Nd!=3W5?
writeln('Hello, world!'); JN|#
end. B~?Q. <M
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/-9+(
Perl h1d0{
#!/usr/local/bin/perl JH,fg K+[
print "Hello, world!\n"; mAERZ<I
nqW:P$
zb*4Nsda:
PHP L PgI"6cP
<?php W-B[_
print("Hello, world!"); E^ti!4{<
?> [~0q )
nf^k3QS\
+ {dIs
Pike DccsVR`7
#!/usr/local/bin/pike +opN\`
int main() +VFwYdW,
{ pIjVJ9+j
write("Hello, world!\n"); meWq9:z
return 0; dQ"W~ig
} QAw,X Z.K^
=)>q.R9
~#Mx&mZ
PL/I U~c;W@T
Test: procedure options(main); xL"o)]a=
declare My_String char(20) varying initialize('Hello, world!'); nlnJJM&J$
put skip list(My_String); S}I=i>QB
end Test; hS/'b$#
!~kzxY
g0$k_
Prolog Kt0Tuj@CY
goal cC]1D*Bn
write("hello,world!"). (!=aRC.-
a
VMFjkW
Rb*\A7o|;
Python 1#uw^{n
#!/usr/local/bin/python (`*wiu+i
print "Hello, world!" BS.6d}G4
Ji=iq=S7
Hvk?(\x
REXX ' qVa/GJ
say "Hello, world!" MPc=cLv
1MSu])
W
s]>%_(5
Ruby boon=;{p
#!/usr/bin/ruby u'."E7o#
print "Hello, world!\n" GC3L2C0)k
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