“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。 ?]0bR]}y
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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》。 <ugy-vSv
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以下是用不同语言写成的Hello World程序的几个例子: WP4"$W
Ada ,pa=OF
with Ada.Text_Io; use Ada.Text_Io; O:+?:aI@
procedure Hello is cT#R B7
begin WR}<^ax
Put_Line ("Hello, world!"); sF1j4 NC
end Hello; Q&e*[l2M6
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汇编语言 9~}.f1z
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x86 CPU,DOS,TASM yGlOs]>n
MODEL SMALL n hGh5,
IDEAL y-)5d
STACK 100H z_ L><}H
B{ cb'\C
DATASEG 3=IY0Q>/(
HW DB 'Hello, world!$' J;Veza
W4:#=.m
CODESEG !p(N
DQm
MOV AX, @data Ky)*6QOw
MOV DS, AX iTJE:[W"y
MOV DX, OFFSET HW vSGvv43G
MOV AH, 09H S0tPnwco[~
INT 21H `D0Hu!;
MOV AX, 4C00H *w6(nG'M{
INT 21H }RZN3U=
END ;%PI
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x86 CPU,GNU/Linux,NASM L*1yK*
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). >?GCH(eW%
;Enter this into "hello.asm" then type: L+NrU+:=C
;"nasm -f elf hello.asm" ]gDX~]f[
;"ld hello.o -o hello" m]'P3^<{P
;"./hello" n!%'%%o2v
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section .data ;data section declaration p-B
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msg db 'Hello World!',0AH $'Qv
{
len equ $-msg ;string length .a
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section .text ;code section declaration 3Hkb)Wu
global _start ;entry point (start of execution) F+?g0w['
_start: mov edx,len ;string length NSQ#\:3:S
mov ecx,msg ;string start tQcn%CK
mov ebx,1 ;file handle: stdout 3/4r\%1b+
mov eax,4 ;sys_write <6!/B[!O=
int 80h ;kernel system call X5c)T}pyv
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mov ebx,0 ;return value WXCZ
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mov eax,1 ;sys_exit | gP%8nh'C
int 80h ;kernel system call Oi\,clR^[o
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swG!O}29OX
x86 CPU,Windows,MASM32 2q%vd=T
.386 ;<nQl,2N
.model flat,stdcall dR
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option casemap:none yIma7H@=L
;Include 文件定义 ,=`iQl3(y/
include windows.inc &9\8IR >
include user32.inc U t.#h="
includelib user32.lib 'Sjt*2blq
include kernel32.inc zAO|{m<A2
includelib kernel32.lib hbE~.[Y2r
;数据段 ++Fk8R/$U[
.data 6}GcMhU<r
szCaption db 'A MessageBox!',0 .X{U\{c| a
szText db 'Hello,world!',0 ?eri6D,86w
;代码段 yPVK>em5
.code +X!QH/ 8
start: ]%I|C++0
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK & _mp!&5XV
invoke ExitProcess,NULL JId|LHf*P
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> UGK,+FN
end start E{}Vi>@V?
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BEGIN { print "Hello, world!" } R![4|FR
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BASIC m-XS_5x\
传统版BASIC(例如GWBASIC): Vv3:x1S
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10 PRINT "Hello, world!" eWTbHF
20 END vJ0Zv>
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或在提示符输入: TtP2>eh-
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?"Hello, world!":END )1o<}7
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现代版BASIC(例如Quick BASIC): J|:Zs1.<d
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Print "Hello, world!" !MQVtn^C#
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以下的语句在Quick BASIC中同样有效: y rmi:=N(
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? "Hello,world!" (5Sv$Xt
\#q|.d$u
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BCPL _e94
GET "LIBHDR" 41NVF_R6J
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LET START () BE :V^|}C#
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WRITES ("Hello, world!*N") nbdjk1E`~
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Befunge )_\q)t"=
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C q-TDg0
#include <stdio.h> \cW9"e'
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int main(void) QB L| n+
{ iuS*Vw
printf("Hello, world!\n"); )T!3du:M
return 0; klSA Y
} SRek:S,
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C++ OGAC[s~V
#include <iostream> g0>Q* x
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int main() :C9vs
{ l{4rKqtX
std::cout << "Hello, world!" << std::endl; )k6kK}
return 0; 5:|=/X%#qp
} RGy+W-
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C++/CLI 8KHT"uc'*J
int main() aYws{Vii
{ x f<wM]&
System::Console::WriteLine("Hello, world!"); sX,S]:X
} %2^wyVkq:
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C# (C Sharp) `e^sQ>rDI
class HelloWorldApp $ uqB.f$
{
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public static void Main() !?5YXI,
{ M}x]\#MMY
System.Console.WriteLine("Hello, world!"); oxXCf%!
} R(on[g_1
} ,f^ICM
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COBOL R/Z
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IDENTIFICATION DIVISION. d34BJ<
PROGRAM-ID. HELLO-WORLD. HMqR%A
MkX=34oc^
ENVIRONMENT DIVISION. SkyX\&
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DATA DIVISION. SaSj9\o
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PROCEDURE DIVISION. (0u(<qA\
DISPLAY "Hello, world!". 66-G)+4
STOP RUN. R(p3*t&n
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Common Lisp "? ON0u9
(format t "Hello world!~%") 5%RiM|+
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DOS批处理 oMHTB!A=2
@echo off yZkS
echo "Hello, world!" {3!E8~
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a6!|#rt
Eiffel t4Pi <m:7
class HELLO_WORLD D`3`5.b
FA!!S`{\
creation hO; XJyv
make &gsBbQ+qA
feature p> g[: ~
make is v W4n>h}]
local AL;4-(KH
io:BASIC_IO %uDH_J|^
do Mh~E]8b
!!io odW K\e
io.put_string("%N Hello, world!") P7\?WN$p
end -- make .FC|~Z1T<F
end -- class HELLO_WORLD \IZY\WU}2
IR|#]en
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Erlang 3<HZ)w^B
-module(hello). 4d\V=_);r
-export([hello_world/0]). Ui.S)\B
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hello_world() -> io:fwrite("Hello, World!\n"). nM|F
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Forth '9!J' [W
." Hello, world!" CR J?C:@Q
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Fortran ZlP+t>
WRITE(*,10) MI)v@_1d
10 FORMAT('Hello, World!') LB`{35b-
STOP oL@K{dk
END `T{'ufI4B
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HTML V.Tn1i-v
<HTML> PU8dr| !
<HEAD>
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<TITLE> Hello World! </TITLE> )3k?{1:
</HEAD> <QD[hO^/
<BODY> JJK-+a6cX
<p>Hello World!</p> Rqr>B(|
</BODY> bvS6xU-
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</HTML> 3~:9ZWQ/
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PLEASE DO ,1 <- #13 9{
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DO ,1 SUB #1 <- #238 N&