“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。 5Vf#(r f
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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》。 Sh=z
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以下是用不同语言写成的Hello World程序的几个例子: ~#OnA1)
Ada <Y<%=`
with Ada.Text_Io; use Ada.Text_Io; Fb.wm
procedure Hello is UG 9uNgzQ/
begin %nT!u!#
Put_Line ("Hello, world!"); )g+~"&Gcx
end Hello; 1@;Dn'
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汇编语言 T[q2quXgk
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x86 CPU,DOS,TASM 08cCrG
MODEL SMALL ioz4kG!
IDEAL -=@d2LY
STACK 100H _KLKa/3
8+^q9rLii
DATASEG XeJn,=
HW DB 'Hello, world!$' K#tT \
z'j4^Xz?%$
CODESEG Qne@Vf kA
MOV AX, @data bRfac/:}
MOV DS, AX o4\\q66K
MOV DX, OFFSET HW yIA-+# r[
MOV AH, 09H 6|| zfH
INT 21H k_/*>lIZY
MOV AX, 4C00H 'de&9\
INT 21H K>N\U@@8i
END 0EKi?vP@y7
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;M1# M:
x86 CPU,GNU/Linux,NASM +9<"Y6
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). $mgW|TBXCQ
;Enter this into "hello.asm" then type: ~5q1zr)E
;"nasm -f elf hello.asm" yX0nyhq
;"ld hello.o -o hello" *%E4,(T
;"./hello" Kejp7okb
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section .data ;data section declaration d)1 d0ES
msg db 'Hello World!',0AH SFv'qDA
len equ $-msg ;string length 3 f@@|vZF
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$!wBi
section .text ;code section declaration A+de;&
global _start ;entry point (start of execution) QV)>+6\
_start: mov edx,len ;string length &N:Iirg
mov ecx,msg ;string start <A^sg?s<'
mov ebx,1 ;file handle: stdout kUGOkSP8[
mov eax,4 ;sys_write C.].HQ
int 80h ;kernel system call k{d]
N:x--,2
mov ebx,0 ;return value [MhKR }a
mov eax,1 ;sys_exit +saXN6
int 80h ;kernel system call ;-#2p^
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x86 CPU,Windows,MASM32 ,sI<AFI
.386 x{4{.s%+:
.model flat,stdcall WX6}@mS.
option casemap:none %;_94!(hC
;Include 文件定义 Xdh2
include windows.inc cD6S;PSg
include user32.inc hz:h>Hwy
includelib user32.lib i'V("
include kernel32.inc _rM?g1}5j
includelib kernel32.lib 2,aH1Xbex
;数据段 *,& 2?E8
.data J/LsL
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szCaption db 'A MessageBox!',0 R!f<6l8#W
szText db 'Hello,world!',0 ;`Nh@*_
;代码段 t.y-b`v
.code :^7>kJ5?
start: ttOk6-
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK G?kK:eV
invoke ExitProcess,NULL =' uePM")
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 7-:R{&3Lm:
end start l^F ?^kP
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AWK v{d$DZUs
BEGIN { print "Hello, world!" } Ps!umV
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BASIC CRBj>
传统版BASIC(例如GWBASIC): Z<^;Ybw{`Z
w=pr?jt1:
10 PRINT "Hello, world!" \~RDvsSD
20 END ]Hp>~Zvbb
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或在提示符输入: DA1?M' N
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?"Hello, world!":END e:%|.$4OG
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现代版BASIC(例如Quick BASIC): CYRZ2Yrk?"
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Print "Hello, world!" #u}%r{T
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以下的语句在Quick BASIC中同样有效: K!]a+M]>
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? "Hello,world!" Kci. ,I
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BCPL (+c1 .h
GET "LIBHDR" ],_+J*
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LET START () BE Aa=:AkrH
$( AdVc1v&>
WRITES ("Hello, world!*N") fWZ(
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Befunge <+k"3r{y"
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Brainfuck |GtvgvO,
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+++++++++++++++.>.+++.------.--------.>+.>. d2V X\
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#include <stdio.h> =e4 r=I
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int main(void) 'C/yQvJ
{ CJ*
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printf("Hello, world!\n"); _Z23lF9
return 0; $c9-Q+pZ
} XEgJ7h_
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C++ 5BJE
#include <iostream> -~mgct5
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int main() #L~i|(=U5
{ &)Xc'RQ.C
std::cout << "Hello, world!" << std::endl; Lm
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return 0; &^r>Q`u
} _p^"l2%D/
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C++/CLI 9<6q(]U
int main() ovdJ[bO
{ j-":>}oW2.
System::Console::WriteLine("Hello, world!"); yd).}@
} N%
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C# (C Sharp) Nob(D'vSr
class HelloWorldApp {drc}BL_
{ 5~|{:29X
public static void Main() Snx!^4+MF
{ aYWWln
System.Console.WriteLine("Hello, world!"); $VuXr=f}
} ){*+s RBW
} "j@\a)a
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COBOL T.4&P#a1
IDENTIFICATION DIVISION. m1l6QcT1
PROGRAM-ID. HELLO-WORLD. U[@y8yN6M
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ENVIRONMENT DIVISION. m^k0j/
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DATA DIVISION. -QrC>3xZR
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PROCEDURE DIVISION. ,%M[$S'
DISPLAY "Hello, world!". A*EOn1hN
STOP RUN. Rff F:,b
wDJ`#"5p{
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Common Lisp pk :P;\
(format t "Hello world!~%") WMSJU/-P
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v1.3gzR
DOS批处理 CkT(\6B-
@echo off JE=t
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echo "Hello, world!" X\AH^I6S
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Bq q=2lj
Eiffel an"&'D}U
class HELLO_WORLD *MP.YI:h
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creation '<R>cN"
make R4m{D
feature 5*AXL.2ih
make is Zt `Tg7m
local 4:`D3
io:BASIC_IO D 2X_Yv
do qt@L&v}~j
!!io JvpGxj
io.put_string("%N Hello, world!") ]~({;;3o-
end -- make m`/Nl<
end -- class HELLO_WORLD 9iA rBL"
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Erlang Cn{Hk)6
-module(hello). l":W@R
-export([hello_world/0]). Ri. tA
mj~:MCC
hello_world() -> io:fwrite("Hello, World!\n"). LeKovt%
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M]x>u@JH
Forth x:|Y)Dn\
." Hello, world!" CR $x0SWJ \G
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YX\vk/[|
Fortran <ql,@*Y
WRITE(*,10) kT%wt1T4
10 FORMAT('Hello, World!') v}G^+-?
STOP g'8Y5x[
END w;z7vN~/O
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HTML !+l'<*8V
<HTML> =Zd(<&B K
<HEAD>
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<TITLE> Hello World! </TITLE> qt/K$'
</HEAD> al2t\Iq90
<BODY> MdHm%Vx
<p>Hello World!</p> E+f)Zg
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</BODY> ]Bhy=1
</HTML> oBzl=N3<
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INTERCAL ]<;,HGO
PLEASE DO ,1 <- #13 );5o13h2
DO ,1 SUB #1 <- #238 >4:d)
DO ,1 SUB #2 <- #112 J K
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DO ,1 SUB #3 <- #112 g@.$P>Bh
DO ,1 SUB #4 <- #0 y.r N(
DO ,1 SUB #5 <- #64 (eHyas %X
DO ,1 SUB #6 <- #238 Vwkvu&4
DO ,1 SUB #7 <- #26 iI3:<j
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DO ,1 SUB #8 <- #248 J2UQq 7-y
DO ,1 SUB #9 <- #168 xoaO=7\io
DO ,1 SUB #10 <- #24
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DO ,1 SUB #11 <- #16 HA6tGZP*L
DO ,1 SUB #12 <- #158 i"8mrWb
DO ,1 SUB #13 <- #52 L P<A q
PLEASE READ OUT ,1 _plK(g-1J%
PLEASE GIVE UP zLI0RI.Pe
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Java $|K
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public class Hello Knq9"k
{ i?00!t
public static void main(String[] args) / f%mYL
{ d2k-MZuT6
System.out.println("Hello, world!"); K/Q"Z*
} gP^2GnjHL8
} hHs/Qtq
#6`5-5Ks;
Ndmt$(b
JSP Z>[7#;;
<% &Y@i:O
out.print("Hello, world!"); }X(&QZ7i`
%> )2}R1K>
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MIXAL u
v%Q5O4
TERM EQU 19 the MIX console device number bJ^JK
ORIG 1000 start address \}j MC
START OUT MSG(TERM) output data at address MSG / 3A6xPOg
HLT halt execution i\R0+O{
MSG ALF "MIXAL" OM*_%UF
ALF " HELL" Y\|#Lu>B
ALF "O WOR" &q