“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。 7v=Nh
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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》。 ea B-u
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以下是用不同语言写成的Hello World程序的几个例子: e`C'5`d]
Ada KU$.m3A>
with Ada.Text_Io; use Ada.Text_Io; O(!wDnhc
procedure Hello is <0lfkeD
begin IJ=~hBI
Put_Line ("Hello, world!"); G>H&M#7K
end Hello; 2TIZltFS0e
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汇编语言 #n0P'@d,r
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x86 CPU,DOS,TASM |\,e9U>
MODEL SMALL T}fo:aB}
IDEAL 3+(Fq5I
STACK 100H ;O.U-s
F
lbL`@4M
DATASEG uTn(fs)D
HW DB 'Hello, world!$' Bz]64/
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CODESEG *6=[Hmygi
MOV AX, @data 7gPkg63
MOV DS, AX yyBfLPXZ
MOV DX, OFFSET HW N/^r9Nu
MOV AH, 09H <5q:mG88
INT 21H ("IRv>} 0
MOV AX, 4C00H "iOT14J!7
INT 21H Yuh t<:`
END 191O(H
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x86 CPU,GNU/Linux,NASM 8l)^#"ySA
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). Tb~(?nY5
;Enter this into "hello.asm" then type: fMhMB |W.
;"nasm -f elf hello.asm" o6oZk0
;"ld hello.o -o hello" =|am=Q?Q
;"./hello" +vJ[k 2d
Gu&zplB
section .data ;data section declaration 0* ,r
msg db 'Hello World!',0AH OTalR;:]r
len equ $-msg ;string length ?JtFiw
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section .text ;code section declaration Rs5G5W@"A
global _start ;entry point (start of execution) vek9. 4! ]
_start: mov edx,len ;string length kG\+f>XQ
mov ecx,msg ;string start zFwp$K>{QY
mov ebx,1 ;file handle: stdout Q9?/)&3Bu
mov eax,4 ;sys_write KxK$Y.y]
int 80h ;kernel system call glPOW
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mov ebx,0 ;return value 8?P@<Do%
mov eax,1 ;sys_exit xZbm,.v
int 80h ;kernel system call Oh-HfJyi
jjEkz 5
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x86 CPU,Windows,MASM32 D|6prC%/
.386 +'Tr>2V
.model flat,stdcall H4Pj 3'
option casemap:none R:Z{,R+
;Include 文件定义 gb8nST$r
include windows.inc [2.pZB
include user32.inc qdNYY&6>?u
includelib user32.lib uRwIxT2
include kernel32.inc Gl`Yyw@84
includelib kernel32.lib kcM9
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;数据段 [ gx<7}[
.data *W%HTt"N
szCaption db 'A MessageBox!',0 ep>S$a*|
szText db 'Hello,world!',0 1}BW
;代码段 5;C+K~Y
.code }(O
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start: J{\S+O2,*
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK @kRe0:t
invoke ExitProcess,NULL ~z%K9YcyU
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> *A;~~SQ
end start >mi%L3Pk
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AWK *5.s@L( VU
BEGIN { print "Hello, world!" } a~DR$^m
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BASIC VQ{}S $jQ
传统版BASIC(例如GWBASIC): 0:Yz'k5
s>76?Q:i
10 PRINT "Hello, world!" 03iO4yOu
20 END r,!7TuBl
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或在提示符输入: KYu3dC'/,&
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?"Hello, world!":END /{\tkvv-Z
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现代版BASIC(例如Quick BASIC): :|EM1-lwf
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Print "Hello, world!" '9H7I! L@
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以下的语句在Quick BASIC中同样有效: BO5F6lyQ0P
#]q<fhJhr$
? "Hello,world!" )PVX)2P_C
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# G0jMQ
BCPL tE/j3
GET "LIBHDR" {ckA
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LET START () BE "AS;\-Jk
$( %AF~Ki
WRITES ("Hello, world!*N") ahU\(=
$) bT@3fuL4
.fk!~8b[Q+
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Befunge X25cU{
"!dlrow olleH">v 9(dbou
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^_@ #f5-f
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fpwge/w
Brainfuck JVD#wwic
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+++++++++++++++.>.+++.------.--------.>+.>. Z f4Xt
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C |
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#include <stdio.h> QHUoAa`6v
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int main(void) %u-l6<w#R
{ 79AOvh
printf("Hello, world!\n"); X<9jBj/t
return 0; >j{phZ
} Y .Na9&-(
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C++ +O`0Mc$%'
#include <iostream> UxzZr%>s
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int main() 7rw}q~CE5
{ ;]3Tuq
std::cout << "Hello, world!" << std::endl; ~T7\lJ{%G
return 0; y&")7y/uE
} Z#IRNFj
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C++/CLI a02@CsH
int main() m;)[gF
{ C s?kZ
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System::Console::WriteLine("Hello, world!"); ;?"2sS!AHQ
} .-T^S"`d|
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#lRkp.e
C# (C Sharp) MYFRrcu;
class HelloWorldApp glbU\K> >
{ zpx
public static void Main() _"6{Rb53v=
{ YIGQDj@
System.Console.WriteLine("Hello, world!"); SxcNr5F
} RR>Q$K
} c7.%Bn,
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COBOL ^5x\cR
IDENTIFICATION DIVISION. =t\HtAXn[
PROGRAM-ID. HELLO-WORLD. Eqj&SA
*6=2UJcJ
ENVIRONMENT DIVISION. ?NoG.
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DATA DIVISION. yyb8ll?@a
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PROCEDURE DIVISION. ]p~w`_3v
DISPLAY "Hello, world!". ZG+8kt!w
STOP RUN. Z;`ts/?SY]
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cl:h'aG
Common Lisp c L}}^
(format t "Hello world!~%") |{]W (/
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:1NF#-2\f
DOS批处理 E
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@echo off ^u`1W^>
echo "Hello, world!" v#J2yg
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C&?Z\$
-/
Eiffel w6(E$:#d
class HELLO_WORLD E0]B=-
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creation #InuN8sI
make ZqH.$nXP
feature [S;ceORx
make is L,6v!9@
local .&fG_(6|
io:BASIC_IO |Xz-rgkQ
do If[4]-dq
!!io uL| Wuq
io.put_string("%N Hello, world!") 6jz6
end -- make 3VNYDY`>
end -- class HELLO_WORLD x{y}pH "H
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Erlang @$o.Z;83`r
-module(hello). !0i6:2nw
-export([hello_world/0]). #pDWwnP[rt
_D<=Yo
hello_world() -> io:fwrite("Hello, World!\n"). Itaq4 ^CE
ZYf0FC=-
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Forth 3Wv-olv
." Hello, world!" CR pK/r{/>r
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o%Ubn*
Fortran G':wJ7[]`
WRITE(*,10) {"f4oK{w
10 FORMAT('Hello, World!') jUnS&1]MF
STOP 02+ k,xFb
END =zaf{0c
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HTML ITpo:"X g
<HTML> B8J_^kd
<HEAD> Z9S5rPHEL
<TITLE> Hello World! </TITLE> :'hc&wk`
</HEAD> C=k]g
<BODY> l 1C'<+2j!
<p>Hello World!</p> QlxzWd3=q
</BODY> o;w5;TkY
</HTML> } J_"/bB
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HRP
HQ9+ 3:H[S_q
H v*Dz4K#
!]#@:Z
:`jB1rI
INTERCAL ERka l7+
PLEASE DO ,1 <- #13 Z|t`}lK
DO ,1 SUB #1 <- #238 z8VcV*6
DO ,1 SUB #2 <- #112 E}qW'
DO ,1 SUB #3 <- #112 GvB;o^Wd
DO ,1 SUB #4 <- #0 8D]&wBR:
DO ,1 SUB #5 <- #64 d2~*fHx_!
DO ,1 SUB #6 <- #238 `eo$o!
DO ,1 SUB #7 <- #26 W{@,DQ
DO ,1 SUB #8 <- #248 Yee%
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DO ,1 SUB #9 <- #168 +Oxw?`I$
DO ,1 SUB #10 <- #24 -e2f8PV?3
DO ,1 SUB #11 <- #16 r(qwzUI
DO ,1 SUB #12 <- #158 l.>3gjr
DO ,1 SUB #13 <- #52 fpPB_P{Ua
PLEASE READ OUT ,1 R(t1Ei.-?
PLEASE GIVE UP V7S[rI<<r
;:WM^S
NsJ]Tp5!
Java S'
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public class Hello L>3- z>u,
{ |XrGf2P9u
public static void main(String[] args) Jn\@wF9xd
{ +|K/*VVn`
System.out.println("Hello, world!"); N{}o*K
} 6,raRg6
} ;t xW\iy%Z
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Dug{)h_2
JSP t&>eZ"
<% )k~{p;Ke
out.print("Hello, world!"); h
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%> 6uu49x_^L4
j>I.d+
-)pVgf
MIXAL 77/j}Pxh
TERM EQU 19 the MIX console device number }Q1m
ORIG 1000 start address Ly_.%f
START OUT MSG(TERM) output data at address MSG cT.8&EEW
HLT halt execution sUl
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MSG ALF "MIXAL" Z,QSbw@,7
ALF " HELL" .4%6_`E
ALF "O WOR" +ab#2~,)
ALF "LD " KB`">zq$u
END START end of the program dXMO{*MF{H
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Nuva 8eDKN9kq
<..直接输出..> Y![//tg
Hello, world! KkPr08
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<..或者..> eFz!`a^dX
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<. rXF=/
// 不带换行 "o>` Y
? "Hello, world!" J]gtgt^
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// 或者 )%Lgo${[;
gMB/ ~g5b0
// 带换行
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?? 'Hello, world!' hB1Gtc4n
.> &?0hj@kd~
1vL$k[^&d
g6!#n
OCaml gVpp9VB
let main () = &Tn7
print_endline "Hello world!";; gH[lpRu|7
U\`yLsKvH`
{3kI~s
Pascal [+
N 5
program Hello; #M=d)}[
begin fud Lm
writeln('Hello, world!'); 1Jn:huV2
end. nk+*M9r|I
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Perl 1`@rAA>h'
#!/usr/local/bin/perl MnT+p[.
print "Hello, world!\n"; `^1&Qz>
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pS@p
PHP iT"H%{+~
<?php V[BlT|t
print("Hello, world!"); ]J6+nA6)
?> hXM2B2[
bcy(
?(
!Knv/:+
Pike >6cENe_@t
#!/usr/local/bin/pike *S>,5R0k
int main() "K*+8IO2
{ *3W e5
write("Hello, world!\n"); 7LdNE|IP
return 0; k%v/&ojI
} B\a#Vtyut
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PL/I V7
dAB,:
Test: procedure options(main); Cb/?hT
declare My_String char(20) varying initialize('Hello, world!'); 7f`x-iH!]7
put skip list(My_String); Q|W!m0XO
end Test; JI}p{yI
3tTz$$-#
xuDn:
Prolog mmn1yX:d
goal @5# RGM)5^
write("hello,world!"). umWZ]8
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Python v1j]&3O
#!/usr/local/bin/python 2)^[SpZ
print "Hello, world!" XU#nqvS` .
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\T_?<t,UT
REXX 5}4MXI4
say "Hello, world!" 3*gWcPGe
kty,hAXe
Pk; 9\0k7
Ruby Gr;~P*
#!/usr/bin/ruby 3&@MZF&
print "Hello, world!\n" 1% )M-io
\g}FoN&