“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。 [?)He} _L
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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》。 )fc+B_
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以下是用不同语言写成的Hello World程序的几个例子: 1(Lq9hs`
Ada X@~R<
with Ada.Text_Io; use Ada.Text_Io; $,1KD3;+]
procedure Hello is $ Vsf?ID
begin p4Xhs@.k
Put_Line ("Hello, world!"); (i]0IYMXy*
end Hello; nTz(
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汇编语言 |eej}G(,m}
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x86 CPU,DOS,TASM V:1_k"zQ
MODEL SMALL =K9-
IDEAL gyv @_}Y3
STACK 100H F'njtrO3
AD"L>7
DATASEG VCUsvhI
HW DB 'Hello, world!$' 5g
phza
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7Q:D
CODESEG ,)t/1oQ}>^
MOV AX, @data '\Uy;,tu /
MOV DS, AX 2L7ogyrU/A
MOV DX, OFFSET HW -qDL':
MOV AH, 09H W_|7hwr
INT 21H k FE<M6a9@
MOV AX, 4C00H J-~:W~Qx4N
INT 21H h.aXW]]}(P
END $_
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x86 CPU,GNU/Linux,NASM Pb/[945
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). PkDh[i9Z|
;Enter this into "hello.asm" then type: |`@7G`x
;"nasm -f elf hello.asm"
lD?]D&
;"ld hello.o -o hello" UphZRgT!N
;"./hello" ":01M},RA
Yr 1k\q
section .data ;data section declaration ?4lEHef
msg db 'Hello World!',0AH bU_P@GKB
len equ $-msg ;string length S| l%JM^
:n$?wp
section .text ;code section declaration $Q56~AP
global _start ;entry point (start of execution) A{\!nq_~N
_start: mov edx,len ;string length ||rZ+<
mov ecx,msg ;string start eu?DSad
mov ebx,1 ;file handle: stdout s"0Hz"[^=
mov eax,4 ;sys_write r?=3TAA
int 80h ;kernel system call cu"ge]},
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mov ebx,0 ;return value jxDA+7
mov eax,1 ;sys_exit 3>G"&T{
int 80h ;kernel system call =E:a\r
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x86 CPU,Windows,MASM32 RVa{%
.386 EdS7m,d
.model flat,stdcall Hr;\}
option casemap:none ~{np G
;Include 文件定义 $R/@%U)-o
include windows.inc WD?COUEox
include user32.inc 4Pr@<S"U
includelib user32.lib -y)g}D%
include kernel32.inc OG2&=~hOz-
includelib kernel32.lib wXU gxa
;数据段 LKu
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.data #:}mi;{
szCaption db 'A MessageBox!',0 (Z at|R.F
szText db 'Hello,world!',0 ;%$wA5"2M
;代码段 G'6f6i|<I@
.code ^1z)\p1
start: =-n7/
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK e2MjV8Bs
invoke ExitProcess,NULL QhmOO-Z?
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Eilo;-El
end start qJEtB;J'
~DUOL~E
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AWK %51HJB}C]
BEGIN { print "Hello, world!" } AR5)Uws
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BASIC MD=!a5'
传统版BASIC(例如GWBASIC): cW\Y1=Gv|
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10 PRINT "Hello, world!" m7m)BX%O
20 END p"=8{LrO
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或在提示符输入: }y#aO
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?"Hello, world!":END yI_MYL[
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现代版BASIC(例如Quick BASIC): <5sP%Fs )
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Print "Hello, world!" [fr!J?/@
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以下的语句在Quick BASIC中同样有效: YEhPAQNj
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? "Hello,world!" E#mpj~{-
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BCPL 6eAJ>9@x
GET "LIBHDR" =FXq=x%9+
t{Gc,S!]5
LET START () BE \xexl1_;
$( _f<#+*y
WRITES ("Hello, world!*N") 55vI^SSA
$) zr[|~-
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h&:6S
Befunge .Sjg
"!dlrow olleH">v WO"<s{v
, V?o%0V
^_@ Hrj@I?4
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Brainfuck `NARJ9M
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< =1Tn~)^O
+++++++++++++++.>.+++.------.--------.>+.>. ;>h:VnV(>(
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C C?lZu\L
#include <stdio.h> uy
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int main(void) RS
/*Dp^
{ =!P$[pN2
printf("Hello, world!\n"); @1iH4RE*
return 0; \6K1Z!*;
} L|K^w *\C
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C++ .V?>Jhok
#include <iostream> SyCa~M!}>
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int main() IltU6=]"l
{ 53)*i\9&
std::cout << "Hello, world!" << std::endl; Lo^gg#o
return 0; \:`-"Ou(*
}
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C++/CLI p)w{}@%r
int main() `ls^fnJTpf
{ )b;}]C
System::Console::WriteLine("Hello, world!"); so@wUxF
} /H<tv5mXJ
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C# (C Sharp) MFO1v%m
class HelloWorldApp !DNk!]|
{ LXx`Vk>ky
public static void Main() SH#!Y
{ ]8ob`F`m,
System.Console.WriteLine("Hello, world!"); t[Ywp!y[
} *d$r`.9j
} xmbFJUMH
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COBOL NJ$c0CNy
IDENTIFICATION DIVISION. ?D S|vCae
PROGRAM-ID. HELLO-WORLD. 2kVQ#JyuRI
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ENVIRONMENT DIVISION. 1i:Q
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DATA DIVISION. rWD*DmY@"
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PROCEDURE DIVISION. +a}>cAj*
DISPLAY "Hello, world!". DS6g_SS3
STOP RUN. +n&9ZCH
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Common Lisp E.+BqWZ!
(format t "Hello world!~%") $ J)2E g
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x|q|> dPB
DOS批处理 T~b6Zu6
@echo off #CTHCwYo
echo "Hello, world!" /eNDv(g)M
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Eiffel B{\qYL/~
class HELLO_WORLD gWpG-RL0
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creation `CF.-Vl3J#
make ;;lOu~-*$p
feature %hH@< <b(s
make is $V2.@X
local h;S?
io:BASIC_IO ~sbn"OS+
do m
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!!io N4[^!}4
io.put_string("%N Hello, world!") `}|$eF&
end -- make `as6IMqJD
end -- class HELLO_WORLD Z}s56{!.
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Erlang ;LE9w^>^V
-module(hello). >}'WL($5U
-export([hello_world/0]). W@FRKDixG
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m
hello_world() -> io:fwrite("Hello, World!\n"). |]'0z0>
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k~HS_b*]d
Forth gtlyQ
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." Hello, world!" CR ?)L X4GY
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Fortran bA8RoC
WRITE(*,10) JPGEE1!B{b
10 FORMAT('Hello, World!') 1_0\_|
STOP kH }HFl
END _W^{,*p
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;/=6~%
HTML 6UnWtLE
<HTML> lz88//@gZ
<HEAD> *J|]E(
<TITLE> Hello World! </TITLE> Ab/KVB
</HEAD> mdy+ >e<
<BODY> =%ZR0cWPoI
<p>Hello World!</p> &