“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。 u
>4ArtF
(nq^\ZdF
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》。
"3wv:BL
f$vwuW
以下是用不同语言写成的Hello World程序的几个例子: ?HV }mS[t
Ada ndqckT@93
with Ada.Text_Io; use Ada.Text_Io; "sD1T3!\)Q
procedure Hello is w=|py>%
begin RJ@\W=aZ
Put_Line ("Hello, world!"); JwB"\&'1ZS
end Hello; ewpig4
vmLpmxS
fa4=h;>a+
汇编语言 /p,{?~0mj
x7HA722w
x86 CPU,DOS,TASM 7_KXD#
MODEL SMALL *U_S1>0n
IDEAL (#If1[L
STACK 100H S!`:E
iKhH ^V%j
DATASEG ';Nu&D#Ph
HW DB 'Hello, world!$' St+ "ih%
^zgacn
CODESEG TU%bOAKF\
MOV AX, @data 2[ksi51y
MOV DS, AX NZ+7p{&AN
MOV DX, OFFSET HW Y([d;_#P
MOV AH, 09H _KN:
o10U
INT 21H Ev{MCu1!6
MOV AX, 4C00H w:Ra7ExP
INT 21H $R?@L
END IkQe~;Y
|g!`\@O
Kr]z]4.d@
x86 CPU,GNU/Linux,NASM kutJd{68
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). I>aGp|4
;Enter this into "hello.asm" then type: V9Hl1\j^
;"nasm -f elf hello.asm" .;g}%C
;"ld hello.o -o hello" IT18v[-G
;"./hello" ^&MK42,\
>Mw'eQ0(y
section .data ;data section declaration }vY.EEy!
msg db 'Hello World!',0AH 7E\g
&R.
len equ $-msg ;string length O@wK[(w^
uFo/s&6K
section .text ;code section declaration kM;o0wi
global _start ;entry point (start of execution) 2T?TM! \Q
_start: mov edx,len ;string length 0<Q*7aY
mov ecx,msg ;string start z&F5mp@
mov ebx,1 ;file handle: stdout +?Ez}
BP
mov eax,4 ;sys_write 7h`^N5H.q
int 80h ;kernel system call H99xZxHZ{
L#2ZMy
mov ebx,0 ;return value Z9VR]cf?
mov eax,1 ;sys_exit {[P!$
/
int 80h ;kernel system call b]i>Bv
{E~Xd
/tZ0
|B(
x86 CPU,Windows,MASM32 -?z\5z
.386 ]Jn2Ra"j
.model flat,stdcall QZ~0o7
option casemap:none ;{gT=,KQ`
;Include 文件定义 3ev -Iqz
include windows.inc +`Pmq}ey
include user32.inc #kci=2q_
includelib user32.lib Ha)np
include kernel32.inc $w/E9EJ)3A
includelib kernel32.lib mX;H((
;数据段 R$d7\nBG
.data |IN[uQ
szCaption db 'A MessageBox!',0 1'fb
@vO
szText db 'Hello,world!',0 QD4:W"i
;代码段 o0mJy'
.code yLqF ,pvO
start: ?oKL&I@
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK ve fU'
invoke ExitProcess,NULL 0>FE%
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Y{+3}drJE
end start &a6,ln:P
?Oc
- aa
RG1\=J$:E
AWK CN\=9Rvs
BEGIN { print "Hello, world!" } O|e}
x*q35K^PE
E-SG8U;
BASIC 8wmQ4){
传统版BASIC(例如GWBASIC): x<>YUw8`
d.AC%&W
10 PRINT "Hello, world!" :,~K]G
20 END E}YIWTX
4K7{f+T
或在提示符输入: cz(G]{N
niz 'b]] +
?"Hello, world!":END wE6A
7\k%
#xp(B5
现代版BASIC(例如Quick BASIC): m9t$h
U&W"Ea=R/
Print "Hello, world!" `0@z"D5c
{SdO9Yy?@7
以下的语句在Quick BASIC中同样有效: b# ='^W3
VB"(9O]
? "Hello,world!" 5v|EAjB6o
ix*muVBj.
tvpN/p
BCPL 0T9.M(
GET "LIBHDR" "
"%#cDR
vyU!+mlc
LET START () BE 6tm\L
$( O{q&]~,
WRITES ("Hello, world!*N") /b%Q[
Ck_
$) I`^Y Abnb
X"<|Z]w
@GeHWv
Befunge Ep ">v>"
"!dlrow olleH">v d.r Y-k
, {7X~!e|w
^_@ :<utq|#s
eaAPKx
_#pnjo
Brainfuck h<NRE0-
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< 8Z8Y[p
+++++++++++++++.>.+++.------.--------.>+.>. e=>%^F
~Z/7pP+
wS$46M<
C u"Fjw F?
#include <stdio.h> UA(;fZ@
28UVDG1?
int main(void) A*i_|]Q
{ S^j,f'2
printf("Hello, world!\n"); (U9a@1
return 0; s|2}2<+
} 1exfCm
iN)af5)[^
Y/lN@
C++ 9@y3IiZ"}
#include <iostream> 6+PGwCS
ri+U0[e3
int main() vr4S9`,
{ BX3lPv
std::cout << "Hello, world!" << std::endl; i0ybJOa4
return 0; }0{B
} ~gdd cTp
k
,fTW^ ?
{ERjeuDm]
C++/CLI VMHC/jlX@r
int main() Zi4d]
{ =DMbz`t
System::Console::WriteLine("Hello, world!"); U
~1SF
} UvBnf+,
JXm?2/
XeU<^ [
C# (C Sharp) Z %EQt
class HelloWorldApp tlGWl0V?7Q
{ w~N-W8xNR
public static void Main() H[nz]s
{ jVYH;B%%z
System.Console.WriteLine("Hello, world!"); w+_Wc~f
} 7#pZa.B)k
} }4h0bI
HcO5?{2
7cw]v"iv
COBOL eq hAus?)
IDENTIFICATION DIVISION. o](.368+4
PROGRAM-ID. HELLO-WORLD. ps+:</;Z
)4uq
iA6
ENVIRONMENT DIVISION. y<M]dd$
:hP58 }Q$
DATA DIVISION. q%S8\bt
!<r8~A3!(
PROCEDURE DIVISION. q[c Etp28h
DISPLAY "Hello, world!". 5-w: c>
STOP RUN. f3&/r
) b:4uK
A
5f_7&NxT
Common Lisp sN]Z
#7
(format t "Hello world!~%") [z+x"9l0!
oAz<G
x'i0KF
DOS批处理 }n[Bq#
@echo off 7I3 :u+
echo "Hello, world!" .bfST.OA
H,|YLKg-|
b:Dg}
Eiffel \h#9oPy
class HELLO_WORLD (\&
62B1
kzi|$Gs<