“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。 z;J"3kM
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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》。 @l41'?m
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以下是用不同语言写成的Hello World程序的几个例子: OWx-I\:
Ada Op0n.\>
with Ada.Text_Io; use Ada.Text_Io;
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procedure Hello is jJml[iC
begin *j6KQZ"
Put_Line ("Hello, world!"); yS'W ss
end Hello; &{-r 5d23
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汇编语言 {<+B>6^
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x86 CPU,DOS,TASM y(^t &tgjS
MODEL SMALL Y7vUdCj
IDEAL @cRR
STACK 100H :{BD/6
h}0}g]IUx
DATASEG ,a
2(h
HW DB 'Hello, world!$' Pw+PBIGn4
>8M=REn4
CODESEG &rs
MOV AX, @data EdcbWf7
MOV DS, AX WVZ](D8Gc]
MOV DX, OFFSET HW AS5'j
MOV AH, 09H 7qsu0 .[d
INT 21H OEiu,Y|@l
MOV AX, 4C00H hQ7-m.UZw
INT 21H J,(@1R]KF:
END fab.%$
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x86 CPU,GNU/Linux,NASM S3oyx#R('O
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). aQ.QkMZ
;Enter this into "hello.asm" then type: ]w,:T/Z}
;"nasm -f elf hello.asm" !WSY75
;"ld hello.o -o hello" *Ri\7CqU"6
;"./hello" 1aAY7Dm_&
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section .data ;data section declaration ^Y%'"QwJS
msg db 'Hello World!',0AH :Oiz|b(
len equ $-msg ;string length 2JdzeJb
d6^:lbj
section .text ;code section declaration X8 $Y2?<
global _start ;entry point (start of execution) I|n?32F
_start: mov edx,len ;string length `uP:UQ9S
mov ecx,msg ;string start ,Iv eKk5W
mov ebx,1 ;file handle: stdout Y-?0!a=e.
mov eax,4 ;sys_write W{RZ@3ZY
int 80h ;kernel system call g?.y7!m
cslZ;
mov ebx,0 ;return value %?`O
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mov eax,1 ;sys_exit o;TS69|D
int 80h ;kernel system call _jb'HP
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CM%Rz-c
x86 CPU,Windows,MASM32 5^ck$af
.386 \wV^uS
.model flat,stdcall yJK:4af;.
option casemap:none a,|Hn
;Include 文件定义 <78*-Ob
include windows.inc u\{MQB{T
include user32.inc skm~~JM^
includelib user32.lib ^sKdN-{
include kernel32.inc [g bFs-B2/
includelib kernel32.lib =X1oB,W{
;数据段 z]2MR2W@X
.data })+iAxR
szCaption db 'A MessageBox!',0
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szText db 'Hello,world!',0 Ze!/b|`xI
;代码段 GrUpATIx
.code
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start: CcTdLq
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK :7M%/#Fy
invoke ExitProcess,NULL l 88n*O
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> ]=o1to-
end start ZZw2m@T>
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BEGIN { print "Hello, world!" } QOX'ZAB`
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BASIC @SH[<c
传统版BASIC(例如GWBASIC): XuWX@cK
q*Oj5;
10 PRINT "Hello, world!" &xt[w>/i
20 END w~_ycY.e
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或在提示符输入: *
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?"Hello, world!":END qnHjw Mi
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现代版BASIC(例如Quick BASIC): %"cOX
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Print "Hello, world!" P*jiz@6
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以下的语句在Quick BASIC中同样有效: \K9.]PfbI
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? "Hello,world!" *s#6e}
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BCPL ALn_ifNh
GET "LIBHDR" !rs }83w!
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LET START () BE nrA 4N1
$( T+x
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WRITES ("Hello, world!*N")
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$) Wy\^}
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Befunge #D#kw*c
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Brainfuck giH#t< )W
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+++++++++++++++.>.+++.------.--------.>+.>. KWeE!f 7G
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C !VaC=I^{
#include <stdio.h> !4!qHJISa
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int main(void) FGPqF;
{ p s?su`
printf("Hello, world!\n"); ~%lA!tsek
return 0; m,"-/)
} }D+ b`,
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C++ |Xm$O1Wa
#include <iostream> ?(U;T!n
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int main() Z"'*A\r2
{ #?+[|RS|
std::cout << "Hello, world!" << std::endl; d2NFdBoI
return 0; j/Y]3RSMp
} WVsj
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C++/CLI z R'EQ
int main() 0 'THL%lK
{ T`pDjT
System::Console::WriteLine("Hello, world!"); `&.qHw)
} ?-%(K^y4r
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C# (C Sharp) ji>LBbnHdE
class HelloWorldApp rW|%eT*/'A
{ {chZ&8)f
public static void Main() d>mT+{3
{ >Ut: -}CS
System.Console.WriteLine("Hello, world!"); SOX7
} 6]Q#4
} 94et ]u%7
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COBOL `R
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IDENTIFICATION DIVISION. &;pM<h
PROGRAM-ID. HELLO-WORLD. ? %8%1d
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ENVIRONMENT DIVISION. 5M~+F"Hl
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DATA DIVISION. Z*f%R\u
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PROCEDURE DIVISION. qy.$5-e:[9
DISPLAY "Hello, world!". ]" e'z
STOP RUN. KQb&7k.
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Common Lisp T
iL.py,
(format t "Hello world!~%") d
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3uxf n=E
%.u*nM7sos
DOS批处理 h~]e~u V
@echo off S[q:b
.
echo "Hello, world!" 9d^m 7}2
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)+'=Zvgej=
Eiffel M;b3-
i
class HELLO_WORLD JFO,Q
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creation =n,1*
make !W8=\:D[
feature szhSI
make is DZ\ '7%c
local 2L;=wP2?{
io:BASIC_IO E9>z.vV
do L fcy#3!
!!io B|"/bQ
io.put_string("%N Hello, world!") 7FPSBvU#/
end -- make 4)OOj14-V
end -- class HELLO_WORLD
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Erlang mjg@c|rTG
-module(hello).
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-export([hello_world/0]). %qo.n v
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hello_world() -> io:fwrite("Hello, World!\n"). h!JyFc
%AtT(G(n
L7aVj&xM
Forth s@iY'11
." Hello, world!" CR l1lYb;C
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Cw(yp u
Fortran D@9 +yu=S
WRITE(*,10) h%$^s0w
10 FORMAT('Hello, World!') 1goRO
STOP H[nBNz)C
END ;`Xm?N
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HTML T30fp
<HTML>
s@"|o3BX
<HEAD> \b$pH
<TITLE> Hello World! </TITLE> svDnw cl
</HEAD> %L]sQq,
<BODY> YaSBIq{z
<p>Hello World!</p> bo90;7EK8
</BODY> xR%NiYNQz
</HTML> [^ r8P:Ad
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r ~UDK]?V
INTERCAL N9#xT X
PLEASE DO ,1 <- #13 w.aEc}@(^
DO ,1 SUB #1 <- #238 k ZF<~U
DO ,1 SUB #2 <- #112 ]i6*$qgma
DO ,1 SUB #3 <- #112 \ +sa[jK
DO ,1 SUB #4 <- #0 ;A@DE@^5w
DO ,1 SUB #5 <- #64 (M1YOK) I
DO ,1 SUB #6 <- #238 M_UmnqN1C
DO ,1 SUB #7 <- #26 bri8o"
DO ,1 SUB #8 <- #248 +aEm]=3
DO ,1 SUB #9 <- #168 $
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DO ,1 SUB #10 <- #24 ^yc8is'`
DO ,1 SUB #11 <- #16 )4qspy3
DO ,1 SUB #12 <- #158 S .x>w/
DO ,1 SUB #13 <- #52 "|dhmV[;
PLEASE READ OUT ,1 ?)(/SZC0
PLEASE GIVE UP ]o"E4Vht
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#[x*0K-h
Java 0{B<A^Bf
public class Hello j2IK\~W?-
{ BI-'&kPk
public static void main(String[] args) i}C%8}%
{ #o}/'
System.out.println("Hello, world!"); gt.F[q3
} cMT:Ij];
} MK/8<i<.
tF-l=ph}`
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JSP p.8
<% [kN_b<Pc,
out.print("Hello, world!"); 8'zl\:@N
%> O/Hj-u6&A
Ad-5Znc5
ulW>8bW&
MIXAL Hc>yZ:c;
TERM EQU 19 the MIX console device number @|t]9
ORIG 1000 start address w0j'>4
START OUT MSG(TERM) output data at address MSG A g+B*
HLT halt execution UcB&