“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。 Ude)$PAe%
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将Hello World程序作为第一个学写的程序,现在已经成为一种传统。该程序最早出现在由Brian Kernighan和Dennis Ritchie写的计算机程序设计教程《C语言程序设计》。 c$)!02
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以下是用不同语言写成的Hello World程序的几个例子: ]tEH `Kl
Ada ;B"S*wYMN
with Ada.Text_Io; use Ada.Text_Io; 4rNuAK`2
procedure Hello is w{Y:p[}
begin p2m`pT
Put_Line ("Hello, world!"); 6^nxw>-
end Hello; `mKK1x
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$60]RCu
汇编语言 6 ;}FZ
5U/C
0{6
x86 CPU,DOS,TASM ,j\UZ
MODEL SMALL luO4ap]*
IDEAL .A<n2-
STACK 100H +/8KN
P vS\
DATASEG X!0m,
HW DB 'Hello, world!$' M{U7yE6*j*
(t-JGye>
CODESEG <(2,@_~@r
MOV AX, @data
/w(t=Y
MOV DS, AX ZDl(q~4?z
MOV DX, OFFSET HW VXu1Y xY
MOV AH, 09H UmA'aq
INT 21H /%h<^YDBf
MOV AX, 4C00H
=uIeur
INT 21H 0D48L5kH#'
END Twr<MXa
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x86 CPU,GNU/Linux,NASM P/hIJV[
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). o_ SR
;Enter this into "hello.asm" then type: Y,C3E>}Dq
;"nasm -f elf hello.asm" ]abox%U=%
;"ld hello.o -o hello" EU-=\Y
;"./hello" hKYA 5]
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section .data ;data section declaration :g=z}7!s
msg db 'Hello World!',0AH 66l$}+|Zzc
len equ $-msg ;string length w>$2
^ G(GjW8
section .text ;code section declaration (E(kw="
global _start ;entry point (start of execution) Z 2u5n`K
_start: mov edx,len ;string length 6tg0=_c
mov ecx,msg ;string start y9L:2f\
mov ebx,1 ;file handle: stdout U.HeIJ#
mov eax,4 ;sys_write }J&[Uc
int 80h ;kernel system call 7'9~Kx&+
C@i4[g){
mov ebx,0 ;return value nWAx!0G
mov eax,1 ;sys_exit i0-zGEMB.
int 80h ;kernel system call Z6I^HG{:
RwC1C(ZP
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x86 CPU,Windows,MASM32 L0HkmaH
.386 >>C(y?g
.model flat,stdcall 'rwnAr
option casemap:none P9aGDma
;Include 文件定义 k6vY/)-S
include windows.inc FF"`F8-w>Z
include user32.inc JtrLTo
includelib user32.lib *MFsq}\ $
include kernel32.inc sKT GZA
includelib kernel32.lib ^Pk-<b4}
;数据段 b^Xq(q>5
.data Z?^~f}+
szCaption db 'A MessageBox!',0 P+Ta|-
szText db 'Hello,world!',0 > ^b6\
;代码段 6R+m;'
.code ytX XZ`
start: W:^\Oe5&a
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK vq~btc.p{&
invoke ExitProcess,NULL `4'['x
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> \?_eQKiZ3
end start (@H'7 ,
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x7=5 ;gf/X
AWK lth t'|
BEGIN { print "Hello, world!" } XO*62>Ed
vt" 7[!O
IG1+_-H:
BASIC 3sf+u oV
传统版BASIC(例如GWBASIC): ROr..-[u
5__8+R
10 PRINT "Hello, world!" ZlHN-!OZp
20 END UGNFWZ c
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或在提示符输入: _
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p-H q\DP
?"Hello, world!":END %.kJ@@_e
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现代版BASIC(例如Quick BASIC): E }aTH
R <+K&_
Print "Hello, world!" xA DjQ%B
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以下的语句在Quick BASIC中同样有效: @3/.W +
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? "Hello,world!" ]~:9b[G2
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0^VA,QkQ\
BCPL RzG<&a3B3s
GET "LIBHDR"
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LET START () BE 0Bx.jx0?
$( 2YD;Gb[8
WRITES ("Hello, world!*N") v7+f@Z:N*
$) d7+YCi?
\Lxsg!wtJ
%a;N)1/
Befunge #WD}XOA
"!dlrow olleH">v LHjGlBy
, u:r'jb~@
^_@ *xxG@h|5n
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t&+f:)n
Brainfuck VY)!bjW.
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< PT7L65
+++++++++++++++.>.+++.------.--------.>+.>. &u-H/CU%
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C yDBS :
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#include <stdio.h> KUG\C\z6=
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int main(void) \'I->O]
{ }Wf \\
printf("Hello, world!\n"); Fj<#*2{]B
return 0; l?:!G7ie
} =
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C++ t0XM#9L
#include <iostream> "71@WLlN
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int main() eIjn~2^
{ ]J\tosTi
std::cout << "Hello, world!" << std::endl; Sns`/4S?6Z
return 0; ^sxcBG
} s^Lg*t3I
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w 8M,35b
C++/CLI T0xU}
int main() J1kG'cH05
{ HMT^gmF)
System::Console::WriteLine("Hello, world!"); ?5d7J,"<h
} 6XPf0Gl
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C# (C Sharp) ,B]kX/W
class HelloWorldApp B.nq3;Y
{ j}NGyS" =
public static void Main() {?c`0C
{ K@u\^6419
System.Console.WriteLine("Hello, world!"); L1;IXCc=
} 5!Y51R^c
} N0EJHS,>e
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COBOL "I.PV$Rxl
IDENTIFICATION DIVISION. |7XV!D!\g
PROGRAM-ID. HELLO-WORLD. !e*BQ3
/ 0Z_$Q&e
ENVIRONMENT DIVISION. o<T_Pjp
NsYeg&>`
DATA DIVISION. W#1t%hT$
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PROCEDURE DIVISION. p:]kH
DISPLAY "Hello, world!". Ba-Ftkb
STOP RUN. K1c@]]y)
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V 4Y w"J
Common Lisp z Qtg]@S
(format t "Hello world!~%") <=KtRE>$
lqPzDdC^>
_B4H"2}[Y
DOS批处理 RM2<%$
@echo off nY7
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echo "Hello, world!" afEhC0j
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Eiffel R<>ptwy
class HELLO_WORLD AN;SRl
Zi$v- b*<
creation RGrra<
make cTW3\S=
feature at_~b Ox6X
make is g~EJja;
local P9j[
NEV
io:BASIC_IO R{zAs?j
do "/v{B?~%!
!!io 5c*kgj:x
io.put_string("%N Hello, world!") : ]&O