“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。 >PGW>W$
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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》。 pMe'fC~*
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以下是用不同语言写成的Hello World程序的几个例子: 'C)`j{CS
Ada yn)K1f^
with Ada.Text_Io; use Ada.Text_Io; yF0\$%H>$
procedure Hello is ?YOH9%_cs
begin ?k
CK$P
Put_Line ("Hello, world!"); uckag/tv
end Hello; NiQ`,Q$B
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p'M5]G
汇编语言 F#*vJb)
yZj:Kp+7
x86 CPU,DOS,TASM ~Pq1@N>n
MODEL SMALL n,q+EZd
IDEAL d[9c6C:<q
STACK 100H tpwMy:<Ex
]h3<r8D_#
DATASEG _~ZNX+4
HW DB 'Hello, world!$' Soy!)c]
B&ItA76
CODESEG X`JWYb4
MOV AX, @data TPH`{
MOV DS, AX `z=U-v'H)D
MOV DX, OFFSET HW 7p}J]!Z
MOV AH, 09H BQu_)@
INT 21H aw&:$twbM
MOV AX, 4C00H e33 j&:O
INT 21H J6r"_>)z
END MB06=N
PeT _Ty
4=!SG4~o
x86 CPU,GNU/Linux,NASM KE! aa&g
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). v6(Yz[
;Enter this into "hello.asm" then type: Ysbd4rN
;"nasm -f elf hello.asm" Z
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6A1
;"ld hello.o -o hello" +y'V
;"./hello" `B'*ln'r5
~b;l08 <
section .data ;data section declaration 1henQiIO
msg db 'Hello World!',0AH (WZKqt)S"o
len equ $-msg ;string length QFt7L
5{/CqUIl
section .text ;code section declaration erTb9`N4
global _start ;entry point (start of execution) ]k~Vh[[
_start: mov edx,len ;string length o>*vG
mov ecx,msg ;string start Rj6:.KEJ
mov ebx,1 ;file handle: stdout x}o]R
mov eax,4 ;sys_write o_;pEe
int 80h ;kernel system call 'NCxVbyYD
3 d
$
mov ebx,0 ;return value lCT N
dW+=
mov eax,1 ;sys_exit gSLwpIK%
int 80h ;kernel system call /xf4*zr
jusP
aAdW
EXn$ [K;
x86 CPU,Windows,MASM32 (}E-+:vFU
.386 ^@f%A<
.model flat,stdcall bU'{U0lM
option casemap:none R{{d4=:S
;Include 文件定义 f5D.wSY
include windows.inc 8was/^9;
include user32.inc Y^5X>
includelib user32.lib ^,S\-Uy9
include kernel32.inc Yas! w'
includelib kernel32.lib nsR^TD;
;数据段 9`{[J['V
.data qT]Bl+h2
szCaption db 'A MessageBox!',0 +SCUS]
szText db 'Hello,world!',0 {MX_t/o=f
;代码段 [?TQ!l} 8A
.code aIaydu+ \
start: XvBEC_xWZ
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK f:iK5g
invoke ExitProcess,NULL L8-
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> <}'hkEh{d=
end start x h[4d
\ZrLh,6f.
tm\ <w H
AWK 6S?a57;&W
BEGIN { print "Hello, world!" } E\!:MCL
oiAU}iK:
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BASIC 2,|*KN*e`W
传统版BASIC(例如GWBASIC): <LM<,
=QEg~sD^)s
10 PRINT "Hello, world!" Re?sopg0r
20 END bu"Jb4_a>
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或在提示符输入: ~D@pk>I
~h -G
?"Hello, world!":END Avw"[~Xd
&rj6<b1A
现代版BASIC(例如Quick BASIC): j}8IT
UNocm0!N'
Print "Hello, world!" 8 g'9( )&
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以下的语句在Quick BASIC中同样有效: q|2{W.P5qi
o*/\oVOq
? "Hello,world!" RLY Ae
7-Rn{"5
ZTd_EY0 q
BCPL LXIlrZ9D5
GET "LIBHDR" Y">tfLIL_
h./cs'&
LET START () BE E=gD{1,?
$( M
"p6xp/
WRITES ("Hello, world!*N") 93fKv
$) G/(oQA
fT._Os?i
,IuO;UV#)
Befunge YkPz ~;
"!dlrow olleH">v Y'/` ?CK
, .^#{rk
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