“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。 2t-w0~O
\A"o[A2v
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》。 >F7w]XH
*[3xc*5F/A
以下是用不同语言写成的Hello World程序的几个例子: _!R$a-
Ada 15\m.Ix
with Ada.Text_Io; use Ada.Text_Io; ^AS\a4`/
procedure Hello is :x)H!z
P
begin &)%+DUV|
Put_Line ("Hello, world!"); H<Oo./8+
end Hello; TZAd{EZa
G
@..?>
$/++afim
汇编语言 _`|1B$@x
'6#G$
x86 CPU,DOS,TASM (~=.[Y
MODEL SMALL En?V\|,
IDEAL //U1mDFT
STACK 100H ?)xIn)#ls
h_vTA
DATASEG w +t@G`d
HW DB 'Hello, world!$' h'):/}JPl
)U?_&LY)[M
CODESEG '4[=*!hs!
MOV AX, @data * x/!i^
MOV DS, AX 4Z( #;9f
MOV DX, OFFSET HW ^dHQ<L3.*
MOV AH, 09H N1c=cZDV
INT 21H i2~uhGJ
MOV AX, 4C00H f"QiVJq
INT 21H (+>
2&@@<
END [1VA`:?W
QPJ\Iu@D$
elOeXYO0
x86 CPU,GNU/Linux,NASM G%<}TI1}
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). Nr~$i% [
;Enter this into "hello.asm" then type: N{;!xIv
;"nasm -f elf hello.asm" ;sZG=y@
;"ld hello.o -o hello" s[yWBew
;"./hello" Cbw *?9d
&AQqI
section .data ;data section declaration fu/8r%:h
msg db 'Hello World!',0AH hmO2s/~
len equ $-msg ;string length _M&TT]a
=
xO03|T;6
section .text ;code section declaration C82_)@96
global _start ;entry point (start of execution) `@~e<s`j
_start: mov edx,len ;string length sgX!4wG&Z
mov ecx,msg ;string start GXtMX ha,
mov ebx,1 ;file handle: stdout jFj11w1FrA
mov eax,4 ;sys_write OSgJj MQ
int 80h ;kernel system call Jz}nV1G(jz
#DTKz]i?
mov ebx,0 ;return value zX>W 8P
mov eax,1 ;sys_exit >lQo _p(;
int 80h ;kernel system call 1-KNXGb'
za>UE,?h
t]yxLl\
x86 CPU,Windows,MASM32 OXEk{#Uf[3
.386 Z2% HQL2
.model flat,stdcall L"bOc'GfQ
option casemap:none liKlc]oM
;Include 文件定义 eUyF<j
include windows.inc Jl
Do_}
include user32.inc Kc MzY
includelib user32.lib 9u B?-.
include kernel32.inc :!`"GaTy
includelib kernel32.lib e
w^(3&
;数据段 [XfR`@
.data ToXWFX
szCaption db 'A MessageBox!',0 f%Q{}fC{*
szText db 'Hello,world!',0 Dyov}y
;代码段 8+zW:0"[
.code !#tVQ2O
start: )pB#7aEw
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK #2{-6ey
invoke ExitProcess,NULL $~/2!T_
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> IGdiIhH~2
end start *c0H_8e
@T'^V0!-q:
t un}rdb
AWK \iuR+I
BEGIN { print "Hello, world!" } lSj
gN~:z
7aG.?Ca%
"s2_X+4oY
BASIC OxlA)$.hpu
传统版BASIC(例如GWBASIC): zA,vp^
=
tv70d'
10 PRINT "Hello, world!" 4"d,=P.{
20 END 7=G2sOC
S$6|KY u
或在提示符输入: ewZ?+G+m
mxa~JAlN_
?"Hello, world!":END ]-=L7a
|.<_$[v[x
现代版BASIC(例如Quick BASIC): p~pD`'%
]g_VPx"
Print "Hello, world!" mzgt>Qtkz=
P*|N)S)X%
以下的语句在Quick BASIC中同样有效: q!Du
J
A~zn;
? "Hello,world!" cG|fau<G
,+=9Rp`md
P"YdB|I
BCPL YW}$e W*
GET "LIBHDR" x.Sf B[SZ
i'>6Qo
LET START () BE zp:dArh0
$( =Tj{)=^/#
WRITES ("Hello, world!*N") oV|O`n
$) -t`kb*O3`
?w3RqF@}
=%Y1] F
Befunge YagfCi ?
"!dlrow olleH">v g}an
5a
, /<LZt<K
^_@ e~r/!B5X
XJ18(Q|w'
t^s&1#iC
Brainfuck fPR_3qgQ
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< @Jt$92i5PS
+++++++++++++++.>.+++.------.--------.>+.>. -JW~_Q[
]\E"oZ
lZFu|(
C '-iEbE
#include <stdio.h> @HT\Y%E
=|3BkmO
int main(void) "J VIkC
{ m%'nk"p9
printf("Hello, world!\n"); L9GLjRp-
return 0; q+g,?;Yx
} b--=GY))F
F%OP,>zl
Y(Q
0m|3P
C++ >O'\
jp}$l
#include <iostream> _~kw^!p>Kr
'Wlbh:=$
int main() bJd|mm/v
{ =i/Df?
std::cout << "Hello, world!" << std::endl; {)YbksrJ{
return 0; @rl5k(
} r- 8Awa
7!O"k#
Z,&