“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。 .A. VOf_
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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》。 L:ox$RU
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以下是用不同语言写成的Hello World程序的几个例子: YnzhvE
Ada 1sqBBd"=PY
with Ada.Text_Io; use Ada.Text_Io; j[Y$)HF
procedure Hello is WDC+Jmlgp
begin `EUufTYi
Put_Line ("Hello, world!"); &]'{N69@d?
end Hello; oWu2}#~z_
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汇编语言 k e
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2+7rLf`l
x86 CPU,DOS,TASM em+dQ15
MODEL SMALL N<|_tC+ct
IDEAL G98P<cyD
STACK 100H wsnR$FhQ`
ok"v`76~f5
DATASEG [zO:[i 7
HW DB 'Hello, world!$' 9Q<8DMX^
WPmH4L>T
CODESEG K\7\
MOV AX, @data [<+A?M=
MOV DS, AX 5v f?E"\r
MOV DX, OFFSET HW Vy:I[@6@+
MOV AH, 09H !y&uK&1
INT 21H ,dTRM
MOV AX, 4C00H 3
?1qI'5
INT 21H ZH:-.2*cj
END mUmU_L u8
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x86 CPU,GNU/Linux,NASM @%7IZg;P6
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). ET_a>]<mv
;Enter this into "hello.asm" then type: ?*36&Iq}
;"nasm -f elf hello.asm" ^u?#fLr
;"ld hello.o -o hello" g ni=S~u
;"./hello" 8!~8:?6n
g[]UM;D*
section .data ;data section declaration H]6i1j
msg db 'Hello World!',0AH 2qw -:
len equ $-msg ;string length Tq\S-K}4!
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section .text ;code section declaration [z2XK4\e1T
global _start ;entry point (start of execution) bjQp6!TsZ
_start: mov edx,len ;string length u?(@hUV.
mov ecx,msg ;string start _6b?3[Xz
mov ebx,1 ;file handle: stdout \{Qd
mov eax,4 ;sys_write Kw`{B3"
int 80h ;kernel system call MM}lW-q;
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mov ebx,0 ;return value t<)Cbple\
mov eax,1 ;sys_exit L\cd=&b`
int 80h ;kernel system call qqL :#]lV5
#JmVq-)
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x86 CPU,Windows,MASM32 6zo'w Wc3
.386 *>lh2sslL
.model flat,stdcall mv5=>Xc6
option casemap:none +VJS/
;Include 文件定义 ! :[`>=!
include windows.inc #Tz$ona
include user32.inc a.n;ika]-
includelib user32.lib FeW}tKH
include kernel32.inc B6N/nCvHK
includelib kernel32.lib n{d0}N=
;数据段 E[:eMJR
.data ^#|Sl D]
szCaption db 'A MessageBox!',0 $pKlF0 .
szText db 'Hello,world!',0 KASuSg+
;代码段 UZ5O%SF
.code skd3E4
start: Q[j'FtP%
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK aG"j9A~ &
invoke ExitProcess,NULL (i1JDe
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> N~""Lc&
end start p?uk|C2
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BEGIN { print "Hello, world!" } \kDQ[4mGq
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BASIC L701j.7"
传统版BASIC(例如GWBASIC): 50s1o{xwc
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10 PRINT "Hello, world!" M id v
20 END jR1o<]?
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或在提示符输入: /C[Q?
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?"Hello, world!":END B(pxyv)
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现代版BASIC(例如Quick BASIC): TANv)&,|9
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Print "Hello, world!" _#UiY
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以下的语句在Quick BASIC中同样有效: L;7u0Yg
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? "Hello,world!" H*m3i;"4p\
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BCPL R@X65o
GET "LIBHDR" V< Ib#rd'
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LET START () BE GM~Ek]9C%
$( z#[PTqD-_
WRITES ("Hello, world!*N") |rgp(;iO
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Befunge {\WRW}iO
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Brainfuck &E]<dmR
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+++++++++++++++.>.+++.------.--------.>+.>. tD~
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#include <stdio.h> qkM)zOZ^
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int main(void) |JL?"cc
{ EV'i/*v}\
printf("Hello, world!\n"); w;{=
return 0; S4_C8
} f7SMO-3a
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C++ +a'LdEp
#include <iostream> Ol
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int main() 3;O4o]`
{ ;e"dxAUe!^
std::cout << "Hello, world!" << std::endl; 8FIk|p|l^
return 0; 8345
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} T4nWK!}z
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C++/CLI i91 =h
int main() -d. i4X3j
{ O**~ Tj
System::Console::WriteLine("Hello, world!"); }G)2HTaZ
} Ox5Es
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C# (C Sharp) tb^/jzC
class HelloWorldApp 4J1_rMfh
{ j8G$ , ~v
public static void Main() lu?:1V-
{ Y3\EX
System.Console.WriteLine("Hello, world!"); s&4&\Aq}x#
} *Fg)`M3g
} 7 w<e^H?
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COBOL 8og8;#mnyr
IDENTIFICATION DIVISION. fm^J-
PROGRAM-ID. HELLO-WORLD. B'e@RhU;
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ENVIRONMENT DIVISION. ;nx.:f
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DATA DIVISION. TILH[r&Jg
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PROCEDURE DIVISION. }BUm}.-{u,
DISPLAY "Hello, world!". P6I<M}p
STOP RUN. (!PsK:wc
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Common Lisp PfsUe,*
(format t "Hello world!~%") D<`M<:nq
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g%V#Z`*|
DOS批处理 k. NJ+
@echo off [4hi/60
echo "Hello, world!" *10qP?0H
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Eiffel D4N(FZ0~
class HELLO_WORLD I+F>^4_d
!rF1Remw
creation 0@um
make !9{hbmF#
feature {r~=mQ
make is AmZW=n2^
local }H<Z`3_U%
io:BASIC_IO '1rGsfp6In
do E4'z
!!io Peo-t*-06
io.put_string("%N Hello, world!") L]%!YP\<T
end -- make ,c-*/{3
end -- class HELLO_WORLD 5UJ ?1"J
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Erlang $) M2
-module(hello). 6<9}>Wkf
-export([hello_world/0]). <5"&]!
.
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hello_world() -> io:fwrite("Hello, World!\n"). OFBEJacy
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Forth %#o@ c
." Hello, world!" CR <d"nz:e
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d!46`b$rd
Fortran I o"3wL)2
WRITE(*,10) d>NO}MR
10 FORMAT('Hello, World!') "iGQ1#6|d
STOP sv&^sARN
END y@,PTF
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HTML J[0 5T1
<HTML> Rc3!u^?u
<HEAD> 4x}U+1B
<TITLE> Hello World! </TITLE> cIQbu#[@
</HEAD> +0)M1!gK
<BODY> 9Zj3 "v+b
<p>Hello World!</p> }& W=
</BODY> eXD~L&s[
</HTML> 7W*a+^
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INTERCAL '&hd^9]Lo
PLEASE DO ,1 <- #13 d"IZt;s/,
DO ,1 SUB #1 <- #238 Phk3Jv
DO ,1 SUB #2 <- #112 O$;#GpR
DO ,1 SUB #3 <- #112 `d^Q!QxE
DO ,1 SUB #4 <- #0 |5%T)
DO ,1 SUB #5 <- #64 !H@HgJ
-
DO ,1 SUB #6 <- #238 =+UtAf<n
DO ,1 SUB #7 <- #26 `"}).{N]C
DO ,1 SUB #8 <- #248 uY(8KW
DO ,1 SUB #9 <- #168 +ue1+#
DO ,1 SUB #10 <- #24 ',xUU{5?
DO ,1 SUB #11 <- #16 .>#O'Z&q9
DO ,1 SUB #12 <- #158 gOe!GnO
DO ,1 SUB #13 <- #52 KO7&