“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。 gtRVXgI
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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》。 ufvjW]
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以下是用不同语言写成的Hello World程序的几个例子: ?L+|b5RS
Ada <m0m8p"G
with Ada.Text_Io; use Ada.Text_Io; $8WeWmY
procedure Hello is a+,zXJQYq
begin :b"&Rc&s.
Put_Line ("Hello, world!"); Hh`HMa'q
end Hello; C8AR^FW
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汇编语言 S t;@ZV
SdNxSD$Q
x86 CPU,DOS,TASM 6ac_AsFK
MODEL SMALL {ug*
IDEAL -7(,*1Tk
STACK 100H d:JP935
6!Uk c'r
DATASEG ()(^B}VK
HW DB 'Hello, world!$' i#:M2&twE
9T%b#~?3P
CODESEG ",P?jgs^g5
MOV AX, @data d-'BT(@:
MOV DS, AX f[Xsri
MOV DX, OFFSET HW :uB(PeAv*
MOV AH, 09H Nn-EtM0w
INT 21H DA^!aJ6iF
MOV AX, 4C00H :Ny^-4-N
INT 21H f6`W(OiE
END m;{(U Z
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x86 CPU,GNU/Linux,NASM BE)&.}l
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). MN[D)RKh;
;Enter this into "hello.asm" then type: & {=}U
;"nasm -f elf hello.asm" _@! yj
;"ld hello.o -o hello"
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;"./hello" P1dFoQz
hr`,s!0Y
section .data ;data section declaration y/;DA=
msg db 'Hello World!',0AH dZuPR
len equ $-msg ;string length ~WKWx.ul
hp$1c
section .text ;code section declaration p
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global _start ;entry point (start of execution) ZDx1v_xr
_start: mov edx,len ;string length g5lK&-yu]
mov ecx,msg ;string start 2)9XTY6$
mov ebx,1 ;file handle: stdout =4
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mov eax,4 ;sys_write $J =`fx
int 80h ;kernel system call <z8z\4Hz
cv-;fd>'
mov ebx,0 ;return value T$1(6<:+.
mov eax,1 ;sys_exit -FQc_k?VF
int 80h ;kernel system call 6f)7*j~
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g1I8_!}~
x86 CPU,Windows,MASM32 ~T!D:2G
.386 &"d
:+!4h
.model flat,stdcall vDCbD#.6
option casemap:none uTNy{RBD+
;Include 文件定义 uoTc c|Kc
include windows.inc KN'twPFq
include user32.inc \0.!al0
includelib user32.lib 't+'rG6x
include kernel32.inc h>ZU67-
includelib kernel32.lib py$i{v%
;数据段 5I[6 "o0
.data Mo]aB:a
szCaption db 'A MessageBox!',0 >%A~ :
szText db 'Hello,world!',0 00pe4^U
;代码段 `a5,5}7v%`
.code A`1-c
start: YM#J_sy@J.
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK ]l^"A~va
invoke ExitProcess,NULL <K
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;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> <SiJA`(7
end start Lw`}o` D
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BEGIN { print "Hello, world!" } y\R-=Am".
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BASIC #g~]2x
传统版BASIC(例如GWBASIC): Se|h]+G
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10 PRINT "Hello, world!" FpZ5@
20 END +de5y]1H,|
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或在提示符输入: zS'{F>w
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?"Hello, world!":END ;iz3Bf1o
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现代版BASIC(例如Quick BASIC): ]F #0to
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Print "Hello, world!" |nY+Nen7
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以下的语句在Quick BASIC中同样有效: #J~xKyJi'
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? "Hello,world!" H[N~)3x
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:3D[~-/S
BCPL cd] X5)$h
GET "LIBHDR" QB*n
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LET START () BE e?WI=Og
$( P_(<?0l
WRITES ("Hello, world!*N") {6iHUK
$) n1)]. `
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lHO.pN`2
Befunge jV' tcFr4
"!dlrow olleH">v caZEZk#r;
, GK&R.R]
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C zwK$ q=-:
#include <stdio.h> W3&~[DS@~
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int main(void) TSj)XU {W
{ \b?O+;5Cj
printf("Hello, world!\n"); XlJ+:st
return 0; 1~[GGl
} ~e=KBYDBu
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C++ M] W5%3do
#include <iostream> LP) IL~
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int main() =<U'Jtu6'
{ sNJ?Z"5k1h
std::cout << "Hello, world!" << std::endl; PcvA/W
return 0; u43-\=1$T
} ihIRB9
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C++/CLI 9\i^.2&
int main() 9 'IDbe{
{ ^@]yiED{g
System::Console::WriteLine("Hello, world!"); #Q%0y^s
} cd$,,
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C# (C Sharp) qGgdWDn`
class HelloWorldApp 8\[qR_LV
{ <"`P;,S
public static void Main() !&o>zU.
{ =A;79@bY
System.Console.WriteLine("Hello, world!"); j4h?"
} K\$z,}0
} sJ|IW0Mr
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COBOL #b{;)C fL
IDENTIFICATION DIVISION. g")pvK[e
PROGRAM-ID. HELLO-WORLD. q,(hs]\@
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ENVIRONMENT DIVISION. ^7C,GaDsn
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DATA DIVISION. Wl3fR[@3Q
OoR0>!x Z
PROCEDURE DIVISION. 1JN/oq;
DISPLAY "Hello, world!". k)JwCt.%
STOP RUN. UbSD?Ew@35
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U6 H@l#
Common Lisp hj[sxC>z5
(format t "Hello world!~%") Xj21:IMR
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DOS批处理 *1_A$14l
@echo off 9R4q^tGR\
echo "Hello, world!"
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Eiffel ^Xslj
class HELLO_WORLD !_h<w ?)
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creation =JB1 ]b{|
make 1iE*-K%Q
feature U
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make is jI807g+
local vC5y]1QDd
io:BASIC_IO CB?,[#r5f
do ,T7(!)dR
!!io L!kbDbqn
io.put_string("%N Hello, world!") Ib$?[
end -- make ;EfREfk
end -- class HELLO_WORLD xsXf_gGu
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p\M\mK
Erlang c (0Ez@
-module(hello). 1 *$-.
-export([hello_world/0]). Q?W}]RW
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hello_world() -> io:fwrite("Hello, World!\n"). z=VL|Du1OT
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Forth u<
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." Hello, world!" CR X3rvM8
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04R-}
Fortran C?%Oi:Gi&
WRITE(*,10) 1fb!sbGD.k
10 FORMAT('Hello, World!') `oo(\O7t=
STOP {siIRl2&
END C@s;0-qL
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nD;8)VI'I
HTML 9~WjCa*,&
<HTML> yn-TN_/Y,
<HEAD> \~'+TW
<TITLE> Hello World! </TITLE> P[C03a!lXg
</HEAD> a]_eSU@
<BODY> VcR(9~
<p>Hello World!</p> M]OZS\9.B
</BODY> *1
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</HTML> %q
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INTERCAL B":u5_B
PLEASE DO ,1 <- #13 &c1zEgl
DO ,1 SUB #1 <- #238 :u>9H{a
DO ,1 SUB #2 <- #112 \d{S3\7
DO ,1 SUB #3 <- #112 Lj03Mx.2S
DO ,1 SUB #4 <- #0 VtD:'L-
DO ,1 SUB #5 <- #64 Q@/358.LA
DO ,1 SUB #6 <- #238 `.a~G
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DO ,1 SUB #7 <- #26 @^kt[$X;
DO ,1 SUB #8 <- #248 KN9 e""
DO ,1 SUB #9 <- #168 Acib<Mi2!-
DO ,1 SUB #10 <- #24 5 MD=o7O^
DO ,1 SUB #11 <- #16 p-o!K\o-1
DO ,1 SUB #12 <- #158 L5yv}:.U
DO ,1 SUB #13 <- #52 \4|o5, +(@
PLEASE READ OUT ,1 VVyms7
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PLEASE GIVE UP ~!{y3thZ
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