“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》。 &~Hx!]uc
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以下是用不同语言写成的Hello World程序的几个例子: !"d"3coQ?
Ada SH1S_EQ<
with Ada.Text_Io; use Ada.Text_Io; @ajt
D-_2
procedure Hello is [_BQ%7DU
begin 5 eLm
Put_Line ("Hello, world!"); SSQB1c
end Hello; luWr.<1
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汇编语言 <5 )F9.$
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x86 CPU,DOS,TASM drwD3jx0xv
MODEL SMALL <jAn~=Uq[,
IDEAL 4 (c{%%
STACK 100H mu*RXLai
ljP<WD
DATASEG 0h-'TJg*sk
HW DB 'Hello, world!$' (=-6'23q)
Q"vhl2RX
CODESEG "Snt~:W>
MOV AX, @data GBY-WN4sc[
MOV DS, AX ?hmuAgOtbh
MOV DX, OFFSET HW 8wEUly
MOV AH, 09H XN&cM,
INT 21H \\ZCi`O
MOV AX, 4C00H ]N;\AXZ7
INT 21H ?/}N
END I7
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x86 CPU,GNU/Linux,NASM FP<mFqy
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). 1/3<u::
;Enter this into "hello.asm" then type: _C3O^/<n4V
;"nasm -f elf hello.asm" jO0"`|(]s
;"ld hello.o -o hello" kBeYl+*pk
;"./hello" Y@y"bjK \
3\ {?L
section .data ;data section declaration O=5q<7PM.
msg db 'Hello World!',0AH ;#?G2AAv
len equ $-msg ;string length hiKyU!)Hv
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section .text ;code section declaration fZiwuq!_
global _start ;entry point (start of execution) eH]9"^>
o
_start: mov edx,len ;string length 5Q/jI$^h0Z
mov ecx,msg ;string start GIvl|
mov ebx,1 ;file handle: stdout KvH t`
mov eax,4 ;sys_write 5X73@Aj
int 80h ;kernel system call _iF*BnmN
.% 79(r^
mov ebx,0 ;return value TE9Iyl|=
mov eax,1 ;sys_exit -A,UqEt
int 80h ;kernel system call u[E0jI
/# d^
9$#@Oe8*
x86 CPU,Windows,MASM32 P''>wjMH0
.386 %x-`Y[
.model flat,stdcall dczq,evp
option casemap:none Oz4vV_a&'
;Include 文件定义 0j :u.x
include windows.inc 6rMXv0)
include user32.inc TWM^5
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includelib user32.lib W#@6e')d
include kernel32.inc j#jwK(:]
includelib kernel32.lib 7?;ZE:
;数据段 /K(l[M
.data M`&78j
szCaption db 'A MessageBox!',0 Z*+y?5+L"P
szText db 'Hello,world!',0 \1O
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;代码段 t"Bp#
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.code #p<(2wN
start: _fdD4-2U
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK jmG)p|6
invoke ExitProcess,NULL 9tWpxrig%
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> (l -l
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end start ZPG~@lU
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AWK OFxCV`>ce
BEGIN { print "Hello, world!" } j>?`N^
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BASIC ?
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传统版BASIC(例如GWBASIC): A%cJ5dF8~
UX'q64F!
10 PRINT "Hello, world!" ,e^~(ITaq
20 END Zu*7t<W
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或在提示符输入: 8!{
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?"Hello, world!":END "rrw~
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现代版BASIC(例如Quick BASIC): Rk-G|52g
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Print "Hello, world!" A34O(fE
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以下的语句在Quick BASIC中同样有效: q"5\bh1"
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? "Hello,world!" :NL[NbQYt
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BCPL "(iDUl
GET "LIBHDR" /
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LET START () BE /BN=Kl]
$( }G "EdhSl
WRITES ("Hello, world!*N") icQQLSU5
$) ($Op*bR
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eE_$ ADEf
Befunge ->*~e~T
"!dlrow olleH">v ]T{v~]7:{
, JAM]neKiX
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4M!wm]n/%5
Brainfuck uzI-1@`
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< XgyLlp;,O
+++++++++++++++.>.+++.------.--------.>+.>. 4:Oq(e_(
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C ?,]eN&`
#include <stdio.h> CED[\n
1>/ iYf
int main(void) Qp7F3,/#
{
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printf("Hello, world!\n"); <(_Tanx9Q
return 0; {6O}E9
} P @J)S ?
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C++ dq%C~j{v
#include <iostream> })`z6d]3
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int main() i8KoJY"
{ -GMaK.4=
std::cout << "Hello, world!" << std::endl; mHAfK B
return 0; DZ1.Bm0
} )G;Hf?M
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C++/CLI ESk:$`P
int main() $E!f@L
{ LqO=wK~
System::Console::WriteLine("Hello, world!"); c^cr_i
}
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C# (C Sharp) I5Ty@J#
class HelloWorldApp pN_%>v"o
{ Pe-rwM
public static void Main() 8_ascvs5
{ j/q&qrlL
System.Console.WriteLine("Hello, world!"); ~W={"n?=
} `DE_<l
} R+t]]n6#
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&*E! %57
COBOL GIT"J}b}
IDENTIFICATION DIVISION. ,6#%+u}f
PROGRAM-ID. HELLO-WORLD. o~W,VhCP
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ENVIRONMENT DIVISION. H |7XfM
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DATA DIVISION. ~g%Ht#<
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PROCEDURE DIVISION. 4"3.7.<Q`
DISPLAY "Hello, world!". DUH DFG
STOP RUN. S>p0{:zM
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Common Lisp LE)$_i8gX
(format t "Hello world!~%") n(|n=P:o
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UCkV;//.
DOS批处理 \{!,a
@echo off KK5_;<
echo "Hello, world!" -"{g kjuv
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G,c2?^#n
Eiffel _~D#?cFY6
class HELLO_WORLD *0eV9!y
Zy.ls&<:
creation q9PjQ%
make 7lA_*t@y
feature #,#:{&H
make is _<DOA:'v
local 6`G8 UDK>F
io:BASIC_IO XN>bv|*q
do 4e;$+!dlV
!!io %3|/t-US
io.put_string("%N Hello, world!") Ww\ WuaY
end -- make }N ).$
end -- class HELLO_WORLD TI<3>R
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h:U#F )
Erlang ,c0LRO
-module(hello). 1Sza%D;3
-export([hello_world/0]). \x\N?$`ANc
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hello_world() -> io:fwrite("Hello, World!\n"). ]h&1|j1
O:a=94
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Forth Cz$q"U
." Hello, world!" CR Lfdg5D5.P
,nCvA%B!
CWRB/WH:
Fortran ~b!la
WRITE(*,10) tJn"$A^N
10 FORMAT('Hello, World!') 6O.kKhk
STOP (9TSH3f?
END Z
h9D^I
5~T+d1md
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HTML NI.ROk1{+4
<HTML> JZ*.;}"
<HEAD> HZ}Igw.Z
<TITLE> Hello World! </TITLE> }<@-=
</HEAD> 1-N+qNSD`
<BODY> ~K;hXf
<p>Hello World!</p> C2\WvE%!
</BODY> 2/tx5Nc
</HTML> }
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H GUqG1u z9
0!KYi_3
W,[QK~
INTERCAL %.]#3tW
PLEASE DO ,1 <- #13 tg==Qgz
DO ,1 SUB #1 <- #238 *5*#Z~dut8
DO ,1 SUB #2 <- #112 fA?v\'Qq/
DO ,1 SUB #3 <- #112 rFkZ'rp74b
DO ,1 SUB #4 <- #0 $pAVTz
DO ,1 SUB #5 <- #64 :dRC$?f4
DO ,1 SUB #6 <- #238 ^);M}~
DO ,1 SUB #7 <- #26 {fHY[8su0
DO ,1 SUB #8 <- #248 )bL(\~0g~
DO ,1 SUB #9 <- #168 /{jt]8/;7
DO ,1 SUB #10 <- #24 yzT1Zg_ER
DO ,1 SUB #11 <- #16 2kDv
(".
DO ,1 SUB #12 <- #158 +kEM%z
DO ,1 SUB #13 <- #52 Yb_HvP
PLEASE READ OUT ,1 D)DD 6
PLEASE GIVE UP ;Ss!OFK
/\uopa
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Java m&DI2he
public class Hello x{zZ%_F
{ YcclO
public static void main(String[] args) 0'.z|Jg=
{ XzX2V">(%
System.out.println("Hello, world!"); iWC}\&i
} +>;Ux1'@
} |e+3d3T35
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"\`Fu
JSP V_D wHq2
<% DTM(SN8R+n
out.print("Hello, world!"); $d])>4eQ
%> a#% *H
D.%%D%AdB
&!O?h/&X3
MIXAL ZWGX*F#}P
TERM EQU 19 the MIX console device number MN5}}@
ORIG 1000 start address k\;D;e{
START OUT MSG(TERM) output data at address MSG mAGD qz>f
HLT halt execution lo'#dpt<
MSG ALF "MIXAL" Mp!1xx
ALF " HELL" 0zT-]0
ALF "O WOR" Q&w_kz.
ALF "LD " -3~S{)
END START end of the program He5y;5
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UR=s=G|
Nuva W2h4ej\s
<..直接输出..> Vn:v{-i
Hello, world! \9tJ/~
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<..或者..> =uNc\a (
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<. &qSf
~7/
// 不带换行 R@5eHP^
? "Hello, world!" O-)[!8r
wb(S7OsMO
// 或者 s_RK x)w@
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// 带换行 }fkdv6mz
?? 'Hello, world!' ,Nhv#U<$
.> ^c(r4#}$"
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1y6<gptx
OCaml ht L1aQ.
let main () = hEZo{0:b"
print_endline "Hello world!";; 9I
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Pascal eFS$ ;3FP1
program Hello; He4HIZ
begin 0-{E% k
writeln('Hello, world!'); $kHXt]fU
end. 7t#Q8u?
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4guR8 elM
Perl r#1W$~?>
#!/usr/local/bin/perl X(Mpg[,N"
print "Hello, world!\n"; w/*#TDR
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btnD+O66<
PHP \),f?f-m
<?php ml^=y~J[
print("Hello, world!"); :=+YZ|&j
?> a3w6&e`
}:{ @nP
YT'V/8US
Pike v?6*n>R
#!/usr/local/bin/pike KaOXqFT=
int main() $|&<cenMT
{ O/ItN5B
;
write("Hello, world!\n"); "s]
return 0; 7BwR ].
} OgQ8yKfDB
i%<NKE;v7m
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PL/I
*q,nALs
Test: procedure options(main); 1BW 9,Xr
declare My_String char(20) varying initialize('Hello, world!'); D*VO;?D
put skip list(My_String); Nl,iz_2]
end Test; +$VDV4l
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P2`F"
Qsq
Prolog (;05=DsO
goal WoB'B|%
write("hello,world!"). [N~-9
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Python
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#!/usr/local/bin/python ZnAQO3%y
print "Hello, world!" d/Wp>A@dob
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PZ'|)
REXX Wtk|}>Pf
say "Hello, world!" 5%QYe]D
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p$x>I3C(\
Ruby I8T*_u^_
#!/usr/bin/ruby qLxcr/fK
print "Hello, world!\n" VB4V[jraCF
h`O$L_Z
}S')!3[G
Scheme *>zOWocxD
(display "Hello, world!") |&-*&)iD|w
(newline) D$H&^,?N
''q;yKpaz
Eul3 {+]
sed (需要至少一行输入) s 72yu}
sed -ne '1s/.*/Hello, world!/p' &FOq c
ht6}v<x.eA
6(htpT%J
Smalltalk CKe72OC
Transcript show: 'Hello, world!' HN/YuP03[
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