“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。 _ -|+k
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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》。 G$[Hm\V
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以下是用不同语言写成的Hello World程序的几个例子: Yq>K1E|
Ada lFN|)(X
with Ada.Text_Io; use Ada.Text_Io; 64qqJmG3
procedure Hello is q&2L@l3A
begin hplx s#
Put_Line ("Hello, world!"); gE9x+g
end Hello; m(w 9s;<
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汇编语言 sV;q(,oru
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x86 CPU,DOS,TASM &fW'_,-
MODEL SMALL 3vHkhhYQ
IDEAL }Ud'j'QMy
STACK 100H Ce/D[%
/V }Z,'+
DATASEG [0!*<%BgK'
HW DB 'Hello, world!$' ?=,7'@e
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CODESEG 'iU+mRLp
MOV AX, @data -_M':
MOV DS, AX ^fj30gw7\5
MOV DX, OFFSET HW 0|6Y%a\U
MOV AH, 09H aZ8f>t1Q
INT 21H E(_lm&,4+
MOV AX, 4C00H ^"iJ
INT 21H cs 58: G5
END T>|Y_3YO_a
OHv4Yy]$B
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x86 CPU,GNU/Linux,NASM Dxe]LES\]
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). |$Cfm}
;Enter this into "hello.asm" then type: \olY)b[
;"nasm -f elf hello.asm" Z>[n~{-,p
;"ld hello.o -o hello" 0|kH0c,T-
;"./hello" >*EJ6FPO
$ I
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section .data ;data section declaration X!6$<8+1OV
msg db 'Hello World!',0AH deEc;IAo
len equ $-msg ;string length b!qlucAeE
6OR) 97
section .text ;code section declaration
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global _start ;entry point (start of execution) n}C0gt-
_start: mov edx,len ;string length
i (`Q{l
mov ecx,msg ;string start ^O& y;5
mov ebx,1 ;file handle: stdout MaLH2?je^n
mov eax,4 ;sys_write uANpqT}!
int 80h ;kernel system call TQykXZ2Yb)
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mov ebx,0 ;return value n72kJ3u.
mov eax,1 ;sys_exit -EE}HUP)
int 80h ;kernel system call P('bnDU
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d .Q<!Au3
x86 CPU,Windows,MASM32 U ]7;K>.T
.386 *xN?5u%
.model flat,stdcall 1.5R`vKn]
option casemap:none 4n*`%V
;Include 文件定义 U|b)Bw<P
include windows.inc }}l jVUpC%
include user32.inc dM-~Qo
includelib user32.lib !DD4Bqez
include kernel32.inc lQv(5hIm
includelib kernel32.lib [<sN "
;数据段 fNV-_^,R9
.data *;l[|
szCaption db 'A MessageBox!',0 )2
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szText db 'Hello,world!',0 So=
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;代码段 $&Z<4:Flc
.code j8%Y[:~D
start: y,K> Wb9e
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK gYloY=.Z$'
invoke ExitProcess,NULL gX|\O']6
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >vXS6`;
end start ^a$L9p(
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$-.*8*9
AWK TPLv]$n
BEGIN { print "Hello, world!" } %r&36d'
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BASIC g1 =>u
传统版BASIC(例如GWBASIC): nW`] =
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10 PRINT "Hello, world!" f ~bgZ
20 END 8Un0<+b
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或在提示符输入: ]]y4$[|L
t#%J=zF{
?"Hello, world!":END `~\8fN
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现代版BASIC(例如Quick BASIC): !3{.
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Print "Hello, world!" 79I"F'
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以下的语句在Quick BASIC中同样有效: 7`e<H 8g
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? "Hello,world!" |XMWi/p
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BCPL D&pp
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GET "LIBHDR" sXtt$HID=
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LET START () BE {1+meE
$( ":qS9vW
WRITES ("Hello, world!*N") }h* j{b,
$) QU(Lv(/O
VV sE]7P ]
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Befunge q29d=
"!dlrow olleH">v J4s`U/F
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Brainfuck @!|h!p;
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< tgHN\@yj
+++++++++++++++.>.+++.------.--------.>+.>. F5OQM?J
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C :&LV^A
#include <stdio.h> "ZA`Lp;%w
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int main(void) Q.\vN-(
{ ?A~=.u@[d
printf("Hello, world!\n"); kWs:7jiiu
return 0; iRqLLMrn
} R]RLy#j
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C++ #WGyQu
#include <iostream> \Ym!5,^o
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int main() ylDfr){
{ @}uo:b:Q
std::cout << "Hello, world!" << std::endl; 8#9OSupp
return 0; Cv/3-&5S
} Ns#L9T#
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C++/CLI .'4@Yp{=
int main() QUg<~q)Oq
{ 2wgcVQ
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System::Console::WriteLine("Hello, world!"); lTFo#p_(
} "{d[V(lE"
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C# (C Sharp) uKB V`I
class HelloWorldApp :qV|rih_Q
{ >SS^qjh/
public static void Main() 7|Iq4@IT
{ E.-2 /'i
System.Console.WriteLine("Hello, world!"); )}vUYTU1
} tf1Y5P$
} Mko,((>I1
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4{b/Nv:b
COBOL AJ6O>Euq
IDENTIFICATION DIVISION. l1%*LyD
PROGRAM-ID. HELLO-WORLD. ZmI#-[/
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ENVIRONMENT DIVISION. NH1ak(zHW
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DATA DIVISION. LmUR@
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PROCEDURE DIVISION. 4 XGEw9`3
DISPLAY "Hello, world!". AboRuHQ
STOP RUN. fSGaUBiq}
a)6?:nY$
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Common Lisp faZc18M^1
(format t "Hello world!~%") a t=;}}X
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f9'dZ}B
DOS批处理 B74]hgK
@echo off Hl8\*#;C&>
echo "Hello, world!" kq(]7jU$[
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Eiffel 6^FUuj.
class HELLO_WORLD Lo"s12fr
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creation (: mF+%(
make JqEo~]E]
feature `[x'EJp#
make is B<~BX[
local q\~D:z$+CO
io:BASIC_IO 'o7V6KG
do SV^[)p)
!!io P%<MQg|k`
io.put_string("%N Hello, world!") Ac/LNqIs
end -- make 1z@ ncqe
end -- class HELLO_WORLD 5o0H7k]
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Erlang lO}I>yo}\
-module(hello). |8{\j*3
-export([hello_world/0]). j3>&Su>H4
8Z
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hello_world() -> io:fwrite("Hello, World!\n"). )1O|+m k
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Forth =CaSd|
." Hello, world!" CR B;Co`o2
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:r&4/sN}<
Fortran msw=x0{n5
WRITE(*,10) X"T)X#:)
10 FORMAT('Hello, World!') qf%p#+:B3
STOP VZ2CWE)t
END / 6DW+!
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HTML ZPHatC
<HTML> y"zZ9HQM
<HEAD> G52z5-=v
<TITLE> Hello World! </TITLE> "h&[6-0'
</HEAD> X\BdN Hr
<BODY> % "ZC9uq?
<p>Hello World!</p> 6{ pg^K
</BODY> jYW-}2L
</HTML> 2JHV*/Q
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INTERCAL Angt=q
PLEASE DO ,1 <- #13 -V||1@
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DO ,1 SUB #1 <- #238 VJtRL')
DO ,1 SUB #2 <- #112 <"LA70Hkk
DO ,1 SUB #3 <- #112 B>
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DO ,1 SUB #4 <- #0 kO,vHg$
DO ,1 SUB #5 <- #64 <ol?9tm
DO ,1 SUB #6 <- #238 O{=@c96rl
DO ,1 SUB #7 <- #26 XZ|\|(6Cc
DO ,1 SUB #8 <- #248 Kq:vTz&<
DO ,1 SUB #9 <- #168 8`q"] BQN
DO ,1 SUB #10 <- #24 p{w;y6e
DO ,1 SUB #11 <- #16 ,){WK|_
DO ,1 SUB #12 <- #158 &GI'-i
DO ,1 SUB #13 <- #52 RP6hw|
PLEASE READ OUT ,1 w.Go]dpK
PLEASE GIVE UP bWMb@zm
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EL9JM}%0v
Java &"X1w $
public class Hello gE6{R+sp
{ B)Dsen
public static void main(String[] args) (KT+7j0^
{ =5g|7grQ:`
System.out.println("Hello, world!"); tU>4?`)E
}
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} N gOc2I
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JSP g"D:zK)
<% 37|EG
out.print("Hello, world!"); 4HyD=6V#
%> e`%<D[-
jft@ 'W53
h ?+vH{}j
MIXAL BNbz{tbX"
TERM EQU 19 the MIX console device number !]#;'
ORIG 1000 start address E1|:t$>Ld
START OUT MSG(TERM) output data at address MSG r5uX?^mJ0
HLT halt execution Q_|Lv&
MSG ALF "MIXAL" .vpx@_;]9
ALF " HELL" .WW|v
ALF "O WOR" iMp_1EXe
ALF "LD "
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END START end of the program ^L's45&_
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<..直接输出..> [3(lk_t
Hello, world! f`p"uLNo<
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<..或者..> iKgH
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<. 7]8apei|
// 不带换行 Qx77%L4
? "Hello, world!" vi0nJ -Xg
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// 或者 wmFS+F4`2
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// 带换行 @5TJ]=
?? 'Hello, world!' !ziO1U
.> 9 H~OC8R:
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;d||u
OCaml ~01Fp;L/
let main () = mvGj
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print_endline "Hello world!";; i8`0-
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Pascal 5=P*<Dnj
program Hello; Y/G~P,9
begin n7'X.=o7
writeln('Hello, world!'); 76EMS?e
end. >3y:cPTM5
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Perl @Yh%.#\i%
#!/usr/local/bin/perl IVSd,AR7yY
print "Hello, world!\n"; YW^sf,zQ
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PHP R8fB
8 )
<?php LT)G"U~
print("Hello, world!"); 9K_p4
mq
?> Xh"8uJD
mO^vKq4r.
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Pike _9"%;:t
#!/usr/local/bin/pike nSh}1Arp/
int main() +:m'
{ )zq sn
write("Hello, world!\n"); " IC0v9
return 0; /}RW~ax
} $rmfE
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PL/I f#zm}+,`
Test: procedure options(main); L2^M#G@t
declare My_String char(20) varying initialize('Hello, world!'); i@STo7=
put skip list(My_String); x8E!Ko](
end Test; ^Euqy,8}
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~!TRR.
Prolog p*"H&xA@
goal E=8$*YUW(g
write("hello,world!"). %P-z3 0FHp
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