“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。 ldG$hk'
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将Hello World程序作为第一个学写的程序,现在已经成为一种传统。该程序最早出现在由Brian Kernighan和Dennis Ritchie写的计算机程序设计教程《C语言程序设计》。 EV~?]Kt~
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以下是用不同语言写成的Hello World程序的几个例子: HZ\=NDz
Ada 8JO(P0aT
with Ada.Text_Io; use Ada.Text_Io; n|PW^kOE/
procedure Hello is ASNo6dP7
begin >DW%i\k1V~
Put_Line ("Hello, world!"); <*p
end Hello; H#bu3*'
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汇编语言 ?Y9VviC
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x86 CPU,DOS,TASM };cH5bYF
MODEL SMALL w/7vXz<
IDEAL %@;xbKj
STACK 100H !,*Uvs@b
2}ywNVS
DATASEG L_>LxF43
HW DB 'Hello, world!$' v)'Uoe"R%
ay28%[Q b4
CODESEG EFs\zWF
MOV AX, @data a & 6-QVk
MOV DS, AX I>>X-}
MOV DX, OFFSET HW dp:5iuS
MOV AH, 09H {|Fn<&G
INT 21H V#+J4
MOV AX, 4C00H f:9qId
;/M
INT 21H e4cWi
END 0#F<JsO|u
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x86 CPU,GNU/Linux,NASM Ude)$PAe%
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). ?/KkN3Y_j[
;Enter this into "hello.asm" then type: H"|oI|~
;"nasm -f elf hello.asm" "6iq_!#L
;"ld hello.o -o hello" A@ w9_qo
;"./hello" v<?k$ e5
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section .data ;data section declaration x
~@%+d
msg db 'Hello World!',0AH pz/vvH5
len equ $-msg ;string length 6Kd,(DI
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section .text ;code section declaration QST-!`]v
global _start ;entry point (start of execution) SwhArvS
_start: mov edx,len ;string length mzTM&@
mov ecx,msg ;string start 0a)LZp|
mov ebx,1 ;file handle: stdout :?7^STc
mov eax,4 ;sys_write rf$eg
int 80h ;kernel system call 4n.EA,:g:(
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mov ebx,0 ;return value |C\XU5}
mov eax,1 ;sys_exit QWK\6
int 80h ;kernel system call $60]RCu
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x86 CPU,Windows,MASM32 Fi#b0S
.386 U9q6m3#$
.model flat,stdcall q.p.y0
option casemap:none ,j\UZ
;Include 文件定义 UC"_#!3
include windows.inc [b@9V_
include user32.inc F#7A6|
includelib user32.lib HQ3kxOT
include kernel32.inc *lp{,
includelib kernel32.lib rcjj(
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;数据段 `,FvYA"
.data ]N1gzHaS
szCaption db 'A MessageBox!',0 EA!I&
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szText db 'Hello,world!',0 \H.1I=<
;代码段 &n&ndq
.code p87VJ}
start: <(2,@_~@r
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK M'ZA(LVp
invoke ExitProcess,NULL %ZZW
p%uf
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> %|By ?i
end start WR4 \dsgCU
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BEGIN { print "Hello, world!" } C)0JcM
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BASIC ;S^7Q5-
传统版BASIC(例如GWBASIC): [+4--#&{
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10 PRINT "Hello, world!" -8, lXrH
20 END 8E\6RjM
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或在提示符输入: uVV;"LVK~
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?"Hello, world!":END -$_h]x*
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现代版BASIC(例如Quick BASIC): $ ~2qEe.h
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Print "Hello, world!" )I9W a*I
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以下的语句在Quick BASIC中同样有效: {t<U:*n2
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? "Hello,world!" `Ui|T
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Qxh 1I?h
BCPL =lqGt.x
GET "LIBHDR" L;k9}HWpP
06S-3bis
LET START () BE N6_<[`
$( gdyP,zMD7
WRITES ("Hello, world!*N") *%xmCPJ
$) X3;|h93.a
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Befunge }[*BC5{>
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!|gln)|A
Brainfuck :svRn9_8H
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+++++++++++++++.>.+++.------.--------.>+.>. !`%3?}mv,
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#include <stdio.h> Lg[_9`\
h tn?iLq
int main(void) Dk XB
{ RwC1C(ZP
printf("Hello, world!\n"); #(G#O1+
return 0; F7zBm53
} REvY`
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