“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。 vX?C9Fr 2
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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》。 v'Pbx
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以下是用不同语言写成的Hello World程序的几个例子: @x^/X8c(p
Ada $WiUoS
with Ada.Text_Io; use Ada.Text_Io; $3S`A]xO
procedure Hello is *qJHoP;
begin Mn 8|
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Put_Line ("Hello, world!"); o?d`o$
end Hello; k]9y+WC2
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汇编语言 ,T-xuNYC
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x86 CPU,DOS,TASM SAU` u]E
MODEL SMALL w0O(>
IDEAL 1 XpqnyL&
STACK 100H Ekn3ODz,
KP`Pzx
DATASEG ;D<;pW
HW DB 'Hello, world!$' *|^||
bd
Rw<O%i5/d
CODESEG qN^]`M[ BY
MOV AX, @data ?jsgBol
MOV DS, AX ba)hWtenH
MOV DX, OFFSET HW ctPT=i60
MOV AH, 09H {*"\68e
INT 21H ~"Su2{"8B
MOV AX, 4C00H 4WPco"xH!
INT 21H jw)c|%r>
END ";upu
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x86 CPU,GNU/Linux,NASM 4YXp,U
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). )1g\v8XT
;Enter this into "hello.asm" then type: Y}h&dAr
;"nasm -f elf hello.asm" @cQ
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;"ld hello.o -o hello" T#KVN{O
;"./hello" dFZh1*1
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section .data ;data section declaration _`Dz%(c
msg db 'Hello World!',0AH /PpZ6ne~[
len equ $-msg ;string length \Hu?K\SWs
;,Os3
section .text ;code section declaration P!!:p2fo
global _start ;entry point (start of execution) 1i#U&
_start: mov edx,len ;string length lr[&*v?h
mov ecx,msg ;string start L>rW S-
mov ebx,1 ;file handle: stdout F<O<=Ww
mov eax,4 ;sys_write K,!f7KKo
int 80h ;kernel system call y(j vl|z[
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mov ebx,0 ;return value b(A;mt#N
mov eax,1 ;sys_exit 'EB5#
int 80h ;kernel system call JY9hD;`6y
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x86 CPU,Windows,MASM32 f.RwV+lq
.386 ^mZTki4
.model flat,stdcall (Li)@Cn%
option casemap:none bQwiJ`B&
;Include 文件定义 G 'CYvV
include windows.inc C7!=LiK}
include user32.inc Ws[d. El
includelib user32.lib wQU-r|
include kernel32.inc ,]=Qgn
includelib kernel32.lib J|b:Zo9<f"
;数据段 ?D]T|=EZY
.data 9|hPl-.
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szCaption db 'A MessageBox!',0
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szText db 'Hello,world!',0 LESF*rh=
;代码段 =e]Wt/AQ
.code @TnAO8Q>XD
start: fQ,(,^!;
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK #J4,mFMr
invoke ExitProcess,NULL G/8G`teAZ
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 7h.:XlUm|
end start m} nA-*
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BEGIN { print "Hello, world!" } ^i~'aq
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BASIC !_[^%7"S1
传统版BASIC(例如GWBASIC): 7 m!e\x8
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10 PRINT "Hello, world!" y8\4TjS1
20 END ]ipltR7k
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或在提示符输入: UkBr4{+aE
Yim` 3>#t
?"Hello, world!":END g,cl|]/\d
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现代版BASIC(例如Quick BASIC): dNcP_l/A
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Print "Hello, world!" b."1p7'
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以下的语句在Quick BASIC中同样有效: })}-K7v1+
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? "Hello,world!" R?[KK<sWWe
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GET "LIBHDR" .EUOKPK4W
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LET START () BE nANoy6z:
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WRITES ("Hello, world!*N") x?|
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Befunge W=EvEx^?%
"!dlrow olleH">v Lqv5"r7eV
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cTeEND)
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Brainfuck N5=;
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#include <stdio.h> U/oncC5
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int main(void) =,~h]_\_
{ D`lTP(] y
printf("Hello, world!\n"); wKCHG/W
return 0; rnVh
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} RYaf{i`
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C++ gHC -Y 0_
#include <iostream> i(JBBE"
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int main() 1Q6WpS
{ EIwTx:{F
std::cout << "Hello, world!" << std::endl; xaWm wsym
return 0; _1`*&k
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} x(z[S$6Y\
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C++/CLI V$+xJ m
int main() 5yO6szg
{ k|,pj^
System::Console::WriteLine("Hello, world!"); tZ[Y~],F
} Pt?]JJxl-
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C# (C Sharp) U%ce0z
class HelloWorldApp d^IOB|6Q
{ <w}k9(Ds
public static void Main() 3mgFouX2x,
{ I;L$Nf{v
System.Console.WriteLine("Hello, world!"); ?^us(o7-
} 0i9y-32-
} FK{YRt
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COBOL @<\f[Znto
IDENTIFICATION DIVISION. 3Qe:d_
PROGRAM-ID. HELLO-WORLD. O: sjf?z
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ENVIRONMENT DIVISION. m~#S76!w
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DATA DIVISION. fSl+;|Kn
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PROCEDURE DIVISION. tOwwgf
DISPLAY "Hello, world!". -c%GlpZw
STOP RUN. &Hc8u,|
o)cd!,h
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Common Lisp `ItMn&P
(format t "Hello world!~%") }.4`zK&SB
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DOS批处理 `,aPK/
@echo off [Ym?"YwVX
echo "Hello, world!" Q}W6?XDu
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vyERt^z
Eiffel ;Mc\>i/
class HELLO_WORLD xg'z_W
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creation 3ZU`}
make $B*E k>EK
feature +e%9P%[+
make is #,q w~l]
local A"\kdxC
io:BASIC_IO Jj|HeZ1C f
do cuBOE2vB.
!!io i15uHl
io.put_string("%N Hello, world!") . 3=WE@M
end -- make 5Qo\0YH
end -- class HELLO_WORLD @ ILG3"
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Erlang 4!d&Zc>C4
-module(hello). X +*@
-export([hello_world/0]). +e`f|OQ
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hello_world() -> io:fwrite("Hello, World!\n"). k)b}"' I
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Forth
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." Hello, world!" CR \kvd;T#t6
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Fortran y!6B Gz
WRITE(*,10) "8&pT^
10 FORMAT('Hello, World!') ~_QZiuq&
STOP wP/&k`HQ#i
END Ha@'%<gFe
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HTML mFjX
<HTML> P\tP0+at
<HEAD> 2S&e!d-
<TITLE> Hello World! </TITLE> II3)Cz}xRG
</HEAD> HlqCL1\<
<BODY> r )ZUeHt}w
<p>Hello World!</p> [pUw(KV2m
</BODY> \6-x~%xK
</HTML> M")J buI
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INTERCAL o%i^t4J$e
PLEASE DO ,1 <- #13 (wEaa'XL
DO ,1 SUB #1 <- #238 1 "?KQU
DO ,1 SUB #2 <- #112 [4"1TyW
DO ,1 SUB #3 <- #112 klxVsx%I{G
DO ,1 SUB #4 <- #0 8i!AJF9IQ}
DO ,1 SUB #5 <- #64 uMh[Ht^.
DO ,1 SUB #6 <- #238 I@+h|
n
DO ,1 SUB #7 <- #26 L3JFQc/oh~
DO ,1 SUB #8 <- #248 9 [v=`
DO ,1 SUB #9 <- #168 <+o-{{E[
DO ,1 SUB #10 <- #24 N:GS fM@g
DO ,1 SUB #11 <- #16 btHN
DO ,1 SUB #12 <- #158 z6ISJb
DO ,1 SUB #13 <- #52 Ehi)n)HhG"
PLEASE READ OUT ,1 $}_N379&
PLEASE GIVE UP A-^[4&rb
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yn6k=F
Java 6!dbJ5x1
public class Hello J(JsfU4
{ ( NWT/yBx
public static void main(String[] args) M(|Qvh{Q6
{ ,A`d!{]5
System.out.println("Hello, world!"); M.$Li#So,
} gD10C,{
} k"D6Vyy`
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JSP rt%?K.S/
<%
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out.print("Hello, world!"); ;Pf
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%> #N^TqOr
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yI/2 e [
MIXAL 9pUvw_9MY
TERM EQU 19 the MIX console device number aSdh5?
ORIG 1000 start address =y-L'z&r
START OUT MSG(TERM) output data at address MSG b~X^vXIv%%
HLT halt execution ~,+n_KST;
MSG ALF "MIXAL" s3qWTdM
ALF " HELL" 1c_gh12
ALF "O WOR"
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ALF "LD " J@D5C4>i
END START end of the program 6hDK;J J&
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Nuva ^,u0kMG5l
<..直接输出..> &7Frg`B&:
Hello, world! d]1%/$v^
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<..或者..> !<r+h,C
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