“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。 AH#a+<;a
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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》。 e~he#o[%a
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以下是用不同语言写成的Hello World程序的几个例子: 6*1f -IbV
Ada CE
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with Ada.Text_Io; use Ada.Text_Io; $<VH~Q<
procedure Hello is f\hQ>MLzt
begin #xR=U"
Put_Line ("Hello, world!"); &D|+tu{
end Hello; Qo]qs+
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汇编语言 lQgavP W!
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x86 CPU,DOS,TASM _iA oNT!
MODEL SMALL `uDOIl
IDEAL kTzO4s?
STACK 100H [@pumH>
Z" l].\=
F
DATASEG 0}`
-<(
HW DB 'Hello, world!$' :v45Ls4J
$WRRCB/A6
CODESEG %b h:c5
MOV AX, @data S]}}r)
MOV DS, AX TQ~a5q
MOV DX, OFFSET HW `.~*pT*u
MOV AH, 09H zDm3$P=
INT 21H E&"V~
MOV AX, 4C00H %<|<%~l&
INT 21H n%}#e!
END {QN 5QGvK
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x86 CPU,GNU/Linux,NASM i}f" 'KW
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). (B*,|D[J@i
;Enter this into "hello.asm" then type: 44k8IYC*o
;"nasm -f elf hello.asm" oFzmH!&ED
;"ld hello.o -o hello" Fo0s<YlS-
;"./hello" SgN?[r)
.Y!dO@$:
section .data ;data section declaration ]R^xO;g'
msg db 'Hello World!',0AH 1;,<UHF8N
len equ $-msg ;string length ZBH^0
x*X{*?5@
section .text ;code section declaration AnE]
kq u
global _start ;entry point (start of execution) @d0~'_vtB
_start: mov edx,len ;string length oOLj?
0t
mov ecx,msg ;string start W8-vF++R
mov ebx,1 ;file handle: stdout t3v_o4`&
mov eax,4 ;sys_write s`yg?CR`,
int 80h ;kernel system call |NTqJ j
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mov ebx,0 ;return value y\9#"=+
mov eax,1 ;sys_exit lQRtsmZ0
int 80h ;kernel system call w}97`.Kt!n
D)[(
pOB<Bx5t
x86 CPU,Windows,MASM32 K|D1
.386 5]kv1nQ
.model flat,stdcall XQOM6$~,
option casemap:none }:s.m8LC5n
;Include 文件定义 $
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include windows.inc $&jVEMia
include user32.inc =<TJ[,h
et
includelib user32.lib k O.iJcZg
include kernel32.inc f"4w@X2F
includelib kernel32.lib #g2&x sU
;数据段 XrXW6s;Z
.data I2)2'j,B
szCaption db 'A MessageBox!',0 4T~wnTH0Xg
szText db 'Hello,world!',0 SoFl]^l
;代码段 &
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.code j]mnH`#BL
start: r0pwKRE~t
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK 0hXx31JN N
invoke ExitProcess,NULL >I;.q|T
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> p%#'`*<a_
end start d<m.5ECC}
#oR@!?
yKz%-6cpSl
AWK YPKB4p#
BEGIN { print "Hello, world!" } <1QXZfQ"
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Oe "%v;-
BASIC 4`o<e)c3
传统版BASIC(例如GWBASIC): \0e`sOS`L
nYBa+>3BDf
10 PRINT "Hello, world!" ^nFP#J)_5
20 END ?1LRR
;-x
7^d7:1M
或在提示符输入: \W\*'C8q\
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?"Hello, world!":END &2ty++gC
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现代版BASIC(例如Quick BASIC): N&$ ,uhmO
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Print "Hello, world!" 2^r J|Ni
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以下的语句在Quick BASIC中同样有效: r{*BJi.b
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? "Hello,world!" Y%}N@ ,lT
bV"t;R9
H%}/O;C
BCPL |tse"A5Z
GET "LIBHDR" Qte%<POx+
QTN'yd?WE
LET START () BE vbG&F.P
$( D O||o&u
WRITES ("Hello, world!*N") 2,|;qFJY-@
$) ID{XZ
Tgbq4xR(
-]n%+,3L
Befunge y(^\]-fE
"!dlrow olleH">v W|s";EAM
, k7cY^&o
^_@ M[Nv>
Ua=r24fy
xZ>j Q_}
Brainfuck <zAYq=IU
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< ip1gCH/?_+
+++++++++++++++.>.+++.------.--------.>+.>. N8J(RR9O
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C _qo\E=E
#include <stdio.h> i1bmUKZ8'L
uotW[L9
int main(void) }-u%6KZ
{ cF?0=un
printf("Hello, world!\n"); ?a1pO#{Dg
return 0; 6)20%*[
} (qz)3Fa
7QoMroR
~mMTfC~9
C++ Bx5kqHp^1
#include <iostream> R-wz+j#
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int main() }u{gQlV
{ IcGX~zWr
std::cout << "Hello, world!" << std::endl; E\p"%
return 0; =+q\Jh
} o)R<sT
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l/\D0\x2
C++/CLI sNP
;
int main() ( 5uSqw&U
{ hr hj4
System::Console::WriteLine("Hello, world!"); 8Kk41 =
} %}XyzGq{
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S_;r!.
C# (C Sharp) o/n4M]G
class HelloWorldApp @g]EY&Uzl
{ (vvD<S*
public static void Main() @X560_x[q
{ ;P/ 4.|<
System.Console.WriteLine("Hello, world!"); GS}JyU
} 9jM7z/Ff
} DVJn;X^T:
{];-b0MS~
1uB$@a\
COBOL k,f/9e+#
IDENTIFICATION DIVISION. \<G"9w
PROGRAM-ID. HELLO-WORLD. |{_>H'
ED>a'y$f
ENVIRONMENT DIVISION. y*v|q=
Fmz+ Xb
DATA DIVISION. 5K)_w:U
X
*-{|m1P
PROCEDURE DIVISION. m4Ue)
DISPLAY "Hello, world!". *;~u 5y2b
STOP RUN. U=U5EdN;
gU NWM^n
P|]r*1^5
Common Lisp BBv+*jj
(format t "Hello world!~%") "^a"`?J
)S/=5Uc
V
w58w`e
DOS批处理 ,CuWQ'H
@echo off qPN9Put
echo "Hello, world!" %O<8H7e)V
PL3hrI 5
Kpa$1x
Eiffel M]/DKo
class HELLO_WORLD a ~W
=Vazxt@[
creation '
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make nAAv42j[
feature
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make is aql8Or1[
local a(ITv roM/
io:BASIC_IO R^P>yk8
do RVLVY:h|F
!!io 4RYH^9;>K
io.put_string("%N Hello, world!") @qj]`}Gx'
end -- make g|7o1{
end -- class HELLO_WORLD CyW|k
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cDE5/!
!\9^|Ef?
Erlang P=\{
-module(hello). Au}l^&,zN
-export([hello_world/0]). +oq<}CNr{
I~@8SSO,vH
hello_world() -> io:fwrite("Hello, World!\n"). Z@f{f:Jc/"
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<JU3sXl
Forth slUi)@b
." Hello, world!" CR KB(W'M_D\
:Jv5Flxl
rjO{B`sV*
Fortran o[fg:/5)A
WRITE(*,10) c;fLM`{*
10 FORMAT('Hello, World!') 7v)p\#-
STOP kc't
END `[U.BVP'
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HTML NRx I?v
<HTML> -)VjjKz]8
<HEAD> TjYHoL5
<TITLE> Hello World! </TITLE> #kq!{5,
</HEAD> x\8|A
<BODY> wWiYxBeN
<p>Hello World!</p> Q}KOb4D
</BODY> Jou*e%
</HTML> L\E>5G;
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O=(F46 M
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H F P|cA^$<
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Ve&_NVPrd
INTERCAL k%i.B
PLEASE DO ,1 <- #13 3?I!
DO ,1 SUB #1 <- #238 FiUwy/,ZV
DO ,1 SUB #2 <- #112 "QxULiw
DO ,1 SUB #3 <- #112 \y]K]iv
DO ,1 SUB #4 <- #0 n$r`s`}
DO ,1 SUB #5 <- #64 #S'uqP!
DO ,1 SUB #6 <- #238 >RAg63!`
DO ,1 SUB #7 <- #26 4n7Kz_!SVf
DO ,1 SUB #8 <- #248 ,_Bn{T=U
DO ,1 SUB #9 <- #168 NR1M W^R
DO ,1 SUB #10 <- #24 tZz%x?3G
DO ,1 SUB #11 <- #16 ]rH[+t-
DO ,1 SUB #12 <- #158 J&,hC%]
DO ,1 SUB #13 <- #52 %oTBh* K'o
PLEASE READ OUT ,1 fe98Y-e
PLEASE GIVE UP HbsNF~;
X )tH23
h72/03!
Java 5~@-LXqL
public class Hello aaT3-][
{ j2UQQFh
public static void main(String[] args) e&d$kUJrq
{ \GxqE8
System.out.println("Hello, world!"); KGg
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} ]0ErT9
} H~:oW~Ah
-ZZJk-::
Babzrt-
JSP n+ebi>}P
<% :VZS7$5
out.print("Hello, world!"); UNa"\
%> 1J"I.
!ZH "$m|
AG=PbY9
MIXAL 0P9\; !Y
TERM EQU 19 the MIX console device number 8TT#b?d
ORIG 1000 start address Cd
2<r6i
START OUT MSG(TERM) output data at address MSG ;Jg$C~3tf
HLT halt execution `@],J
MSG ALF "MIXAL" v#%rjml[
ALF " HELL" otR7E+*3
ALF "O WOR" hQm=9gS
ALF "LD " 0't)-Pj+,
END START end of the program =CK% Zo
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D5@=#/?*
Nuva @tm2Y%Y!
<..直接输出..> B?=R= p
Hello, world! F{E@snc
1bCE~,tD
<..或者..> !6=;dX
x,25ROaHY
<. y
2>
93m
// 不带换行 Y^!qeY
? "Hello, world!" SefhOh^,V
@M4c/k}
// 或者 y1%OH#:duD
w+
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// 带换行 zP #:Tv'
?? 'Hello, world!' Su6kpC!EW
.> {] ]%0!n\
GEc-<`-
fGlvum
OCaml DPxx9lN_rx
let main () = =f!A o:Uc
print_endline "Hello world!";; RxYENG]/6
%QEBY>|lI
>ceC8"}J5M
Pascal C`i#7zsH
program Hello; =|1_6.tz
begin KqntOo}
y)
writeln('Hello, world!'); n~ad#iN
end. `~)?OTzU#
P ljPhAce
#RR;?`,L}
Perl vkTu:3Qe
#!/usr/local/bin/perl 4uOR=+/l
print "Hello, world!\n"; 2{b/*w
K-TsSW$}
-@(LN%7!C
PHP u'l4=e
<?php ojnO69v
print("Hello, world!"); ?g+3 URpK
?> lOVcXAe}
YFm%W@
q=88*Y
Pike (x2?{\?
#!/usr/local/bin/pike NgyEy n
\
int main()
QvZ"{
{ erEB4q+ #O
write("Hello, world!\n"); e7;7TrB.
return 0; :KO&j"[
} j;`Q82V\
Hvk~BP'
m
/ZV2f3;t
PL/I yHw @Z
Test: procedure options(main); m)p|NdTZc8
declare My_String char(20) varying initialize('Hello, world!'); D}y W:Pi'
put skip list(My_String); ZDmL?mC
end Test; Lf5zHUH
MQwxQ{
(2H
GV+Dg
Prolog S2'a i
goal zBy} > Jx
write("hello,world!"). vlkwWm
$8eiifj
=|E
"
Python &wK:R,~x6
#!/usr/local/bin/python ik(YJw'i7E
print "Hello, world!" gW~T{+f
cgrSd99.
68u?}8}
REXX A|f6H6UUx
say "Hello, world!" <7U~0@<Y
b&[".ibN1
&!/>B .
Ruby Li5&^RAo|J
#!/usr/bin/ruby xS1n,gTA
print "Hello, world!\n" USyc D`
vmAnBY
n5d8^c! 2
Scheme x>EL|Q=?
(display "Hello, world!") yk4@@kHW
(newline) ;9z|rWsF
*G.vY#h
b
VEJ
sed (需要至少一行输入) %RV81H9B
sed -ne '1s/.*/Hello, world!/p' 2QaE&8vW
~_EDJp1J
>p-UQc
Smalltalk 6a,8t
Transcript show: 'Hello, world!' o664b$5nsI
:%sBY0 yF
gf8o~vKX$G
SNOBOL %evb.h)
OUTPUT = "Hello, world!" $XQgat@&]
END gEk;Tj
c@[Trk m
?.`
ga*
SQL G7&TMg7i
create table MESSAGE (TEXT char(15)); DK?aFSf\
insert into MESSAGE (TEXT) values ('Hello, world!'); (o|bst][S
select TEXT from MESSAGE; BZW03e8|
drop table MESSAGE; phu,&DS!
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!rRBy3&
Tcl z9S
(<