“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。 u,rieKYF
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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》。 3V"y|q
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以下是用不同语言写成的Hello World程序的几个例子: ^6Std
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Ada pNHO;N[&
with Ada.Text_Io; use Ada.Text_Io; 6,C,LT2^(
procedure Hello is Nd"Rt
begin gmY*}d`
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Put_Line ("Hello, world!"); p=U/l#xO
end Hello; ,3zF_y(*Y
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汇编语言 aC&ZV}8of
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x86 CPU,DOS,TASM zMXlLRC0
MODEL SMALL :IZ(9=hs
IDEAL ?rD`'B
STACK 100H ^lP_{c
R`RLq1WA
DATASEG x 7;Zwd
HW DB 'Hello, world!$' YJ&K0%R
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CODESEG W:8*Z8?7
MOV AX, @data {\?zqIM
MOV DS, AX #()u=)
MOV DX, OFFSET HW g]z[!&%Ahs
MOV AH, 09H UI*^$7z1 +
INT 21H >}43xIRRCq
MOV AX, 4C00H H9["ZRL,Q
INT 21H r*'X ]q|L+
END 6G<t1?_yD
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x86 CPU,GNU/Linux,NASM Ef1R?<
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). \xH#X=J
;Enter this into "hello.asm" then type: "\'g2|A
;"nasm -f elf hello.asm" ^Fl6-|^~
;"ld hello.o -o hello" \qrSJ=}t
;"./hello" R7L:U+*V"
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section .data ;data section declaration ohdWEU,
msg db 'Hello World!',0AH 86^xq#+Uw
len equ $-msg ;string length fC2
\k=.w
section .text ;code section declaration &~u=vuX
global _start ;entry point (start of execution) [3s p
_start: mov edx,len ;string length vu%:0p`K
mov ecx,msg ;string start yW$ja|^E
mov ebx,1 ;file handle: stdout pX:FXzYQ
mov eax,4 ;sys_write fC_dSM[{c
int 80h ;kernel system call ;JcOm&d/hk
w2:!yQk_
mov ebx,0 ;return value 2o`a^'Iw
mov eax,1 ;sys_exit 5!55v
int 80h ;kernel system call \;?=h
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x86 CPU,Windows,MASM32 5dVSir
.386 brkR,(#L3
.model flat,stdcall 0,T'z,
option casemap:none |EJ&s393&
;Include 文件定义 ?Jlz{ms I
include windows.inc Ty"OJ
include user32.inc wp!<u
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includelib user32.lib /`3^?zlu"
include kernel32.inc l_lm)'ag
includelib kernel32.lib jhWNMu
;数据段 )
0x*>;"o
.data rAdYBr=0
szCaption db 'A MessageBox!',0 B/i`
szText db 'Hello,world!',0 \8uPHf_
;代码段 6?/$K{AI
.code <ByR!Y
start: 8t$a8 PE
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK t5z6{`
invoke ExitProcess,NULL ?-g=Rfpag
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> OQ$77]XtvL
end start Jlw
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BEGIN { print "Hello, world!" } 8c m,G
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BASIC fCSM#3|,]
传统版BASIC(例如GWBASIC): *v'&i) J
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10 PRINT "Hello, world!" ^;3z9}9
20 END H( `^1
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或在提示符输入: XelY?Ph,,
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?"Hello, world!":END [=Wn7cr
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现代版BASIC(例如Quick BASIC): (Al.hEs'
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Print "Hello, world!" DRD%pm(
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以下的语句在Quick BASIC中同样有效: l1~>{:mq
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? "Hello,world!" R/
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GET "LIBHDR" E+$vIYq:W
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LET START () BE t;9f7~
$( [R j=k)aBm
WRITES ("Hello, world!*N") 3LZ0EYVL
$) @]Ye36v0#L
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Befunge \oPW
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Brainfuck x%ZjGDF m
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+++++++++++++++.>.+++.------.--------.>+.>. 8#S|jBV
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C >R/^|hnJ
#include <stdio.h> 3|%Q{U
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int main(void) 6q?C"\_
{ no+{9Uf
printf("Hello, world!\n"); %;9f$:U
return 0; !z X`M1J
} eKpH|S!xU
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C++ ghJ81
#include <iostream> o"t+G/M
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int main() RX:\@c&
{ kRnh20I
std::cout << "Hello, world!" << std::endl; N(Us 9
return 0; 5xP\6Nx6&5
} *G$tfb(
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C++/CLI k( 1rp|qf
int main() Z=DAA+T`
{ UDV,c o
System::Console::WriteLine("Hello, world!"); nCEt*~t9VE
} FJo N"X
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C# (C Sharp) -O3^q.
class HelloWorldApp r#rQ3&Vn
{ #b []-L!
public static void Main() ?)-*&1cv
{ ^V v7u@y
System.Console.WriteLine("Hello, world!"); Afo(! v
} |h(!CFR
} 7Q} P}9n
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COBOL |vA3+kG
IDENTIFICATION DIVISION.
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PROGRAM-ID. HELLO-WORLD. <r.f ?chf
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ENVIRONMENT DIVISION. X1!m]s(I
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DATA DIVISION. "jmi
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#
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PROCEDURE DIVISION. !NK8_p|X
DISPLAY "Hello, world!". EUmQn8
STOP RUN. .Ff;St
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Common Lisp -MJ6~4k2
(format t "Hello world!~%") 9mwL\j
j% !
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DOS批处理 `4}zB#3
@echo off ,*a8]L
echo "Hello, world!" %Y:'5\^lC
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Eiffel I,QJ/sI
class HELLO_WORLD @~'c(+<3
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creation uu1-` !%
make ~UB@IV6O
feature Sm;&2"
make is ~HI|t2C
local {>fvyF
io:BASIC_IO IfeG"ua|
do .VuZ=
!!io (A\qZtnyl
io.put_string("%N Hello, world!") 8},!t\j#]
end -- make SC74r?NFA
end -- class HELLO_WORLD 8b!&TP~m1
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Erlang Xoml
-module(hello). bw9a@X
-export([hello_world/0]). ;$&&tEh)
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hello_world() -> io:fwrite("Hello, World!\n"). 5R?iTB1,
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Forth #?YQ&o~gZ
." Hello, world!" CR 9yajtR
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Fortran +*a:\b"fx
WRITE(*,10) z(iB$;M
10 FORMAT('Hello, World!') \evK.i*KfA
STOP nORm7sa9
END XB UO
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HTML C^K?"800
<HTML> Q?L-6]pg
<HEAD> Tf
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<TITLE> Hello World! </TITLE> 25t2tj@S
</HEAD> ?W1(
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<BODY> E).Nu
<p>Hello World!</p> L,p5:EW8.
</BODY> <<6i6b
</HTML> 5'?K(Jdmp
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INTERCAL M,8a$Mdqh
PLEASE DO ,1 <- #13 mNc(
DO ,1 SUB #1 <- #238 lJpD>\$}@R
DO ,1 SUB #2 <- #112 *eH[~4
DO ,1 SUB #3 <- #112 HY~\e|o
DO ,1 SUB #4 <- #0 `8\_ ]w0
DO ,1 SUB #5 <- #64 0yfmQ=,X
DO ,1 SUB #6 <- #238 _' Xt
DO ,1 SUB #7 <- #26 R4 ;^R
DO ,1 SUB #8 <- #248 ]BP"$rs
DO ,1 SUB #9 <- #168 F]N9ZWn/
DO ,1 SUB #10 <- #24 >#Y8#-$zc
DO ,1 SUB #11 <- #16 %g^dB M#
DO ,1 SUB #12 <- #158 k+5:fB)z
DO ,1 SUB #13 <- #52 .wtb7U;7
PLEASE READ OUT ,1 Q 6{2@
PLEASE GIVE UP {UQpD
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Java 3cBuqQ
public class Hello AH;0=<n
{ rOm)s'
public static void main(String[] args) 7h<B:~(K
{ b&"=W9(V
System.out.println("Hello, world!"); BLgmFE2
} Y
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} cAM1\3HWT"
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JSP 8|.(Y
<% v:PNt#Ta
out.print("Hello, world!"); ELk$lm&