“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。 VF?<{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》。 9x>d[-#y:J
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以下是用不同语言写成的Hello World程序的几个例子: . 1KhBgy^K
Ada pWK(z[D
with Ada.Text_Io; use Ada.Text_Io; +av@$}
procedure Hello is r'^Hg/Jzt
begin \;qW 3~
Put_Line ("Hello, world!"); FbS|~Rp~
end Hello; $c]fPt"i
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汇编语言 `j,Yb]~s79
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x86 CPU,DOS,TASM 'p>Ra/4
MODEL SMALL ]s'Q_wh_-v
IDEAL 6$kq aS##
STACK 100H ,l!Ta"
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DATASEG Qw-~>d
HW DB 'Hello, world!$' "e.jZcN*
_ FpTFfB
CODESEG -w9pwB
MOV AX, @data Fv~20G(O
MOV DS, AX ;j[>9g
MOV DX, OFFSET HW a1C{(f)
MOV AH, 09H 8K:y\1
INT 21H )'l:K.F
MOV AX, 4C00H &J[:awQX
INT 21H :r{<zd>;
END RL!Oi|8
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x86 CPU,GNU/Linux,NASM [pbo4e,4O
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). l4F%VR4KT
;Enter this into "hello.asm" then type: q]T1dz?
;"nasm -f elf hello.asm" Hx"ob_^'7
;"ld hello.o -o hello" J\+0[~~
;"./hello" ns9U/:L
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section .data ;data section declaration pmuvg6@h
msg db 'Hello World!',0AH MqW7cjg
len equ $-msg ;string length J%u=Ucdh
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section .text ;code section declaration $Q &lSVQ
global _start ;entry point (start of execution) NCiW^#b
_start: mov edx,len ;string length 4w*Skl=F}
mov ecx,msg ;string start cr%"$1sY;
mov ebx,1 ;file handle: stdout Bal$+S
mov eax,4 ;sys_write Oxm>c[R
int 80h ;kernel system call nCUg,;_=
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mov ebx,0 ;return value /a{la8Ni
mov eax,1 ;sys_exit nEJq_
int 80h ;kernel system call 2GP=&K/A
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x86 CPU,Windows,MASM32 Vx$ \hcG
.386 2<i!{;u$qL
.model flat,stdcall ?:vv50
option casemap:none /Gd=n
;Include 文件定义 =O&%c%~q
include windows.inc +[M6X}
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include user32.inc FtpK)9/4
includelib user32.lib '}9x\3E
include kernel32.inc Dt}JG6 S
includelib kernel32.lib C_(
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;数据段 >=qf/K+#
.data 2y//'3[
szCaption db 'A MessageBox!',0 \z>fb%YW
szText db 'Hello,world!',0 /$i.0$L
;代码段 3-[q4R
.code SzAJ2:qhl
start: 3_ r*y9l
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK RmI]1S_=
invoke ExitProcess,NULL Nkjza:f{
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> \MA+f~)9
end start 4QH3fTv
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BEGIN { print "Hello, world!" } tWJZoD6}h
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BASIC wVX[)E\J
传统版BASIC(例如GWBASIC): HU1h8E$-
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10 PRINT "Hello, world!" Vrjc~>X
20 END +Jlay1U&
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或在提示符输入: bENdMH";
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?"Hello, world!":END o@r7
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现代版BASIC(例如Quick BASIC): pf2[,v/
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Print "Hello, world!" ,MdV;j~"'
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以下的语句在Quick BASIC中同样有效: zbXI%
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? "Hello,world!" 4qphA9i1
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BCPL bH-ub2@qO
GET "LIBHDR" ^7>3a/
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LET START () BE !xz eM VI
$( jG6]A"pr
WRITES ("Hello, world!*N") QsGiclU
$) Ot$-!Y;<
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Befunge q?,).x
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+++++++++++++++.>.+++.------.--------.>+.>. TSA,WP\
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C ?J'Y&
#include <stdio.h> pEw"8U
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int main(void) +_7*iJtD5
{ `{4i)n%e&
printf("Hello, world!\n"); d[[]PX
return 0; kM!kD4&
} ~"dA~[r
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C++ J2d.f}-
#include <iostream> 5NBV[EP
d[r#-h>dS
int main() nv ca."5 y
{ #1J &7F1
std::cout << "Hello, world!" << std::endl; ,?PTcQF
return 0; w'L\?pI
} |].pDwgt
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C++/CLI 0,r}o
int main() (
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{ YZP(tn
System::Console::WriteLine("Hello, world!"); avjpA?Vz
} jNu9KlN
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C# (C Sharp) h"`ucC8X
class HelloWorldApp s~X+*@.
{ Tfh 2.
public static void Main() jQk*8
{ YNYx>Ue
System.Console.WriteLine("Hello, world!"); S2n39 3
} `L:CA5sBud
} @|LBn6q
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COBOL O#&c6MDB:
IDENTIFICATION DIVISION. KiRUvWqa
PROGRAM-ID. HELLO-WORLD. lW<PoT
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ENVIRONMENT DIVISION. qs|mj}?
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DATA DIVISION. t(GR)&>.2
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PROCEDURE DIVISION. }
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DISPLAY "Hello, world!". 6Z#\CixG
STOP RUN. >*@y8u*
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Common Lisp :q
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(format t "Hello world!~%") t^`O{m<
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DOS批处理 " .SJ~`S
@echo off 1J6,]M
echo "Hello, world!" cHcmgW\4
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Eiffel ]V-W~r=
class HELLO_WORLD PGYXhwOI
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creation 0E?jW7yr
make C|d\3S\(
feature }K1JU`Lz
make is i O/K nH
local ^M%uV
io:BASIC_IO M~WijDj
do 4
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!!io A
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io.put_string("%N Hello, world!") .~Fp)O:!
end -- make #?*WPq
end -- class HELLO_WORLD nt;haeJ
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Erlang TT50(_8
-module(hello). s
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-export([hello_world/0]). UbEb&9}
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hello_world() -> io:fwrite("Hello, World!\n"). D'L'#/hK
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Forth 3uZJ.Fb
." Hello, world!" CR 1z&Ly3
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Fortran o Y1';&BO9
WRITE(*,10) ,ldI2]
10 FORMAT('Hello, World!') V$"ujRp
STOP >N;F8v
END \A#1y\ok
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HTML ?OE.O/~l
<HTML> Nc:({@I
<HEAD> f;&]:2.j
<TITLE> Hello World! </TITLE> sf OHl
</HEAD> Di@GY!
<BODY> <+^6}8-
<p>Hello World!</p> j4>a(
</BODY> d~/q"r 1"
</HTML> Kx.X 7R
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INTERCAL EyI}{6~F
PLEASE DO ,1 <- #13 }R)=S_j
DO ,1 SUB #1 <- #238 SG?Nsp^%`B
DO ,1 SUB #2 <- #112
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DO ,1 SUB #3 <- #112 tV_t6x_.
DO ,1 SUB #4 <- #0 Yz4_vePh+5
DO ,1 SUB #5 <- #64 V~T@6S
DO ,1 SUB #6 <- #238 gP-nluq
DO ,1 SUB #7 <- #26 rUlS'L;$"
DO ,1 SUB #8 <- #248 Bd^"=+c4
DO ,1 SUB #9 <- #168 0x11
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DO ,1 SUB #10 <- #24 ( 7ws{)
DO ,1 SUB #11 <- #16 -w;(cE
DO ,1 SUB #12 <- #158 Nrah;i+H\o
DO ,1 SUB #13 <- #52 '`|AI:L
PLEASE READ OUT ,1 dLvJh#`o
PLEASE GIVE UP lJzl6&
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Java SVa6V}"Iv
public class Hello B_ja&) !s1
{ ygSL
public static void main(String[] args) rVtw-[p
{ 1[E#vdbT
System.out.println("Hello, world!"); li]
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} tu>{
}
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