“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。 @=,2{JF*6
z~Ph=1O>p
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》。 *vc=>AEc
L]hXAShmb
以下是用不同语言写成的Hello World程序的几个例子: ML'4 2z
Y
Ada jIv%?8+%
with Ada.Text_Io; use Ada.Text_Io; ,mEFp_a+
procedure Hello is %;yDiQ !+
begin 34-QgE
Put_Line ("Hello, world!"); k$UgTZ
end Hello; !4GGq
gYVk5d|8@4
xB_F?d40T5
汇编语言 #/$}zl
E{kh)-
x86 CPU,DOS,TASM AWHB^}!}
MODEL SMALL !`q*{Ojx
IDEAL }M'h5x
STACK 100H q$z#+2u
%ANo^~8
DATASEG i#$9>X
HW DB 'Hello, world!$' -FytkM^]6
+5H9mk
CODESEG FL% GW:
MOV AX, @data CnruaN@
MOV DS, AX rLs)*A!
MOV DX, OFFSET HW xnmIo?
hC
MOV AH, 09H Oe4 l`
=2
INT 21H 0-p LCf
MOV AX, 4C00H Z]D O
INT 21H CXks~b3SD
END Gc>bli<-
ez=$ ]cln
5%"${ywI
x86 CPU,GNU/Linux,NASM ?z% @;&
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). /tl/%:U*.
;Enter this into "hello.asm" then type: 1RM;"b/
;"nasm -f elf hello.asm" s,m+q)
;"ld hello.o -o hello" Yq}7x1mm
;"./hello" \bYuAE1q
O&l(`*P
section .data ;data section declaration K]' 84!l
msg db 'Hello World!',0AH bhe~ekb
len equ $-msg ;string length D.Rk{0se8
SQ|pH"
section .text ;code section declaration 9 +"D8J7
global _start ;entry point (start of execution) tt%Zwf
_start: mov edx,len ;string length q4{Pm $OW
mov ecx,msg ;string start # eqt{
mov ebx,1 ;file handle: stdout vl*CU"4
mov eax,4 ;sys_write WXu:mv,'e
int 80h ;kernel system call Nv "R'Pps
fiOc;d8
mov ebx,0 ;return value 8T92;.~(
mov eax,1 ;sys_exit 7)$U>|=
int 80h ;kernel system call J~KWn.
NLFs)6\
GdG1e%y]z
x86 CPU,Windows,MASM32 PxzeN6f
.386 mbxJS_P
.model flat,stdcall GHj1G,L@\
option casemap:none F>jPr8&
;Include 文件定义 pg~vteq5
include windows.inc ?g%5 d
include user32.inc /:v+:-lU
includelib user32.lib (Z5=GJM?$
include kernel32.inc jcHs!
includelib kernel32.lib <J-bDcp
;数据段 Mf7Q+_!
.data E@TX>M-&
szCaption db 'A MessageBox!',0 WRU/^g3O@'
szText db 'Hello,world!',0 O%5cMz?eU
;代码段 sv\'XarM
.code |0FRKD]
start: t^ LXGQ
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK c_c]0Tm
invoke ExitProcess,NULL ;tTM3W-h
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 'c5#M,G~
end start \eF5* {9
4"1OtBU3
D}'g4Ag
AWK &i"33.#]
BEGIN { print "Hello, world!" } jm&?;~>O
I2kqA5>)j
JbpKstc;
BASIC KK4>8zGR
传统版BASIC(例如GWBASIC): *6 -;iT8
6la# 0U23
10 PRINT "Hello, world!"
hh<5?1
20 END +*'
p 7IJ3YY
或在提示符输入: loN!&YceW
1)(p=<$
?"Hello, world!":END z1}YoCj1
%HSS
x+2oR
现代版BASIC(例如Quick BASIC): iz]Vb{5n%
@QI]P{
Print "Hello, world!" fl _k5Q'&p
hnZI{2XzBE
以下的语句在Quick BASIC中同样有效: =o;QvOS;
-v?,{?$0
? "Hello,world!" hPr*<2mp
Sxf|gDC
*-$u\?$
BCPL hj64ES#x
GET "LIBHDR" ZiM#g1;
BF8n: }9U
LET START () BE @_^QBw0
$( MK9?81xd
WRITES ("Hello, world!*N") 4 q}1
$) vLR)B@O,2
r5Ej
g0I<Fan
Befunge g!~&PT)*
"!dlrow olleH">v &b,.W;+
, B[ae<V0k
^_@ Ht?
u{\p@
ONJW*!(
X@Eq5s
Brainfuck ,{ CgOz+Ul
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< VOwt2&mZ
+++++++++++++++.>.+++.------.--------.>+.>. b0X*+q
y2>v'%]2
mXlXB#N
C P]!$MOt
#include <stdio.h> _Ptf^+
fI`T3 Y!7
int main(void) 4LARqSmt
{ %8/Gsu;
printf("Hello, world!\n"); L`FsK64@
return 0; (ii 5p nq
} seY0"ym&e
2T5@~^:7u
qM3^)U2
C++ Uo(\1&?
#include <iostream> DamLkkoA
0K>rc1dy
int main() 9F0B-aZ
{ 7}Z.g9<
std::cout << "Hello, world!" << std::endl; QI~s~j
return 0; R*.XbkW~
} g _;5"
W6'+#Fp
B;4hI?
C++/CLI -qfd)A6]
int main() %s$_KG !&
{ 1mOZ\L!m*
System::Console::WriteLine("Hello, world!"); FU!U{qDI
} V)R-w`
GK/a^[f+'l
g-mK(kY4p
C# (C Sharp) v3S{dX<
class HelloWorldApp @SPmb o
{ <<(~'$~,L
public static void Main() #:T5_9p
{ yHQ.EZ~%
System.Console.WriteLine("Hello, world!"); vb: '%^v
} <| |Lj
} `h$6MFC/g
0'^? m$
HT
A-L>Cee
COBOL OI %v>ns
IDENTIFICATION DIVISION. @U;-5KYYi
PROGRAM-ID. HELLO-WORLD. v7O{8K+
y$*?k0=ZX
ENVIRONMENT DIVISION. PNT.9 *d
w|Zq5|[
DATA DIVISION. aEXV^5;,pJ
\#tr4g~u
PROCEDURE DIVISION. DetBZ.
DISPLAY "Hello, world!". a&L8W4
STOP RUN. ""Drf=]
1>a^Q
;}f%b E
Common Lisp -2> L*"^
(format t "Hello world!~%") cWFvYF
(4ow0}1
G2a fHL<
DOS批处理 Iay7Fkv
@echo off ,-] JCcH
echo "Hello, world!" ./#K@V1
XIBw&mWf
Ea\a:
Eiffel W7(OrA!
class HELLO_WORLD ddnWr"_
}C"#b\A2
creation ct~lt'L\
make )yJe h
feature J)(]cW.
make is iCAd7=o
local ih+kh7J-
io:BASIC_IO b4%IyJr
do Syp|s3u;
!!io h^hEyrJw
io.put_string("%N Hello, world!") 0)ST_2Ci
end -- make +Ya-h~7;g#
end -- class HELLO_WORLD
C&e
%Pa-fee
`9K'I-hv<8
Erlang _tjFb_}Q
-module(hello). 3J'a
-export([hello_world/0]). Y#]Y$n
W:rzfO.`Z
hello_world() -> io:fwrite("Hello, World!\n"). DT 9i<kl
C
2oll-kN
^D.B^BR
Forth !+>yCy$~_
." Hello, world!" CR -vjjcyTt
JAB]kNvI
gmLw. |-
Fortran \Z+v\5nmO
WRITE(*,10) }ZYK3F
10 FORMAT('Hello, World!') J8b]*2D
STOP E&&