“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。 nulVQOj|
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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》。 Gh>Rt=Qu%
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以下是用不同语言写成的Hello World程序的几个例子: |zKFF?7#wE
Ada `DUMTFcMX
with Ada.Text_Io; use Ada.Text_Io; ,KdDowc
procedure Hello is ;vy" i
begin dNU i|IYm$
Put_Line ("Hello, world!"); p?>(y
end Hello; }} J?, >g
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汇编语言 ~*79rDs{
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x86 CPU,DOS,TASM V<*PaS..
MODEL SMALL |~Z.l
IDEAL [sy~i{Bm
STACK 100H 0L S,(v4
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DATASEG F;kY5+a7~e
HW DB 'Hello, world!$' NhU~'k
^mv F%"g
CODESEG W.'#pd
MOV AX, @data !9_HZ(W&
MOV DS, AX wa\Yc,R
MOV DX, OFFSET HW }~DlOvsq
MOV AH, 09H *:{s|18Pj
INT 21H |D~mLs;&
MOV AX, 4C00H anxgD?<+B
INT 21H I}q2)@
END @@-n/9>vs
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- 0R5g3^*/
x86 CPU,GNU/Linux,NASM lA<n}N)j
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). lmi,P-Q
;Enter this into "hello.asm" then type: z"Miy
;"nasm -f elf hello.asm"
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;"ld hello.o -o hello" MHeUh[%(
;"./hello" HkVnTC
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section .data ;data section declaration ^a^bsKW
msg db 'Hello World!',0AH Ti$G2dBO
len equ $-msg ;string length WK)hj{k
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section .text ;code section declaration 6<u=hhL
global _start ;entry point (start of execution) [ uU"=H|
_start: mov edx,len ;string length kVz9}Xp"
mov ecx,msg ;string start B52n'.
mov ebx,1 ;file handle: stdout mvgsf(a*'
mov eax,4 ;sys_write Tsch:r S
int 80h ;kernel system call 6Ri+DPf:
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mov ebx,0 ;return value #s>AiD
mov eax,1 ;sys_exit b
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int 80h ;kernel system call 8eq*q
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x86 CPU,Windows,MASM32 >HNBTc=~t
.386 Ne#FBRu5
.model flat,stdcall )eIC5>#.
option casemap:none `@TWZ%f6
;Include 文件定义 55q!2>Jh.
include windows.inc Q]$gw,H"6
include user32.inc E6JfSH#
includelib user32.lib H1>~,zc>E
include kernel32.inc /S2lA>
includelib kernel32.lib i<@"+~n~GK
;数据段 XuS3#L/3p
.data M$_E:u&D
szCaption db 'A MessageBox!',0 5|O~
szText db 'Hello,world!',0 jV{?.0/h|
;代码段 |?v(?
.code uDD{O~wF,
start: f#mNx
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK xB-\yWDZe
invoke ExitProcess,NULL Q\Wh]=}
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> TWE>"8]
end start 2iM]t&^<+
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BEGIN { print "Hello, world!" } )|3BS`
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BASIC :m.6a4vx
传统版BASIC(例如GWBASIC): )R6h
1
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10 PRINT "Hello, world!" +FomAs1*f
20 END jkAWRpOc)
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或在提示符输入: 4.Kl/b;
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?"Hello, world!":END I]GGmN
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现代版BASIC(例如Quick BASIC): u00w'=pe)
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Print "Hello, world!" 3JYhF)G
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以下的语句在Quick BASIC中同样有效: VAW:h5j2@
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? "Hello,world!" M(
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BCPL '+EtnWHs
GET "LIBHDR" (aC~0
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LET START () BE elJ?g
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$( [#@\A]LO
WRITES ("Hello, world!*N") i+q tL3
$) :;
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Befunge >Nam@,hm
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Brainfuck Qm_IU!b
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C
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#include <stdio.h> aD^jlt
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int main(void) w#v-h3XcF
{ }j$tFFVi~
printf("Hello, world!\n"); MgO_gFr
return 0; ^HhV?Iqg
} n\ 'PNB
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C++ hbdB67,
#include <iostream> 8]K+,0m6
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int main() F MX^k
{ ,ZI#p6
std::cout << "Hello, world!" << std::endl; 23d*;ri5
return 0; redMlHM
} jl>jy6T
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C++/CLI tWyl&,3?1
int main() E4$y|Ni"
{ 2=
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System::Console::WriteLine("Hello, world!"); w=_q<1a
} }y1r
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C# (C Sharp) YEa<zhO8
class HelloWorldApp B/*\Ih9y
{ 9Y:Iha`$w
public static void Main() L\hid/NL
{ W(}2R>$
System.Console.WriteLine("Hello, world!"); w~C\5 i
} -x{@D{Q%
} ,. zHG
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COBOL C{:U<q
IDENTIFICATION DIVISION. q`VkA
\
PROGRAM-ID. HELLO-WORLD. 1Ep7CV-n}
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ENVIRONMENT DIVISION. n-9a0_{k
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DATA DIVISION. IyEfisOK?
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PROCEDURE DIVISION. mlYkn
DISPLAY "Hello, world!". bt*
STOP RUN. o@ m7@$7
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