“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。 9gZMfP
Vl%AN;o
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》。 m$ )yd~
(CJiCtAsl`
以下是用不同语言写成的Hello World程序的几个例子: X};m \Bz
Ada r/$+'~apTk
with Ada.Text_Io; use Ada.Text_Io; .0:BgM
procedure Hello is rjo/-910
begin D^baXp8
Put_Line ("Hello, world!"); Hzcy'
end Hello; 2E33m*C2
GbFLu`I u
: ^F+mQN
汇编语言 X,C&nqVFm8
5|my}.TR
x86 CPU,DOS,TASM J;W(}"cFq
MODEL SMALL x%pC.0%
IDEAL g{.>nE^Sc5
STACK 100H %0fF_OU
`KqMcAW
DATASEG Dd-;;Y1C
HW DB 'Hello, world!$' Sf);j0G,D
w17\ \[
CODESEG F[<EXLQ
MOV AX, @data Y9Q-<~\z
MOV DS, AX SpPG
MOV DX, OFFSET HW an_qE}P
MOV AH, 09H Jkzt=6WZ0
INT 21H X6kB
R
MOV AX, 4C00H rbiNp6AdL
INT 21H |s-q+q{|
END }__g\?Yf
R7;SZo
IfzHe8>
x86 CPU,GNU/Linux,NASM veFl0ILd
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). Gtd!Y
x
;Enter this into "hello.asm" then type: )xX(Et6+`
;"nasm -f elf hello.asm" "nP mQ
;"ld hello.o -o hello" %C\Q{_ AS
;"./hello" QZB2yK3]h
9yH95uaDF
section .data ;data section declaration #~3x^4Y
msg db 'Hello World!',0AH MlgE-Lm
len equ $-msg ;string length 3UU]w`At
o,[~7N
section .text ;code section declaration #H{<nVvg^
global _start ;entry point (start of execution) JZQkr
_start: mov edx,len ;string length t
j&+HC
mov ecx,msg ;string start f{xR
s-u]
mov ebx,1 ;file handle: stdout I<e[/#5P\`
mov eax,4 ;sys_write L+LxS|S+M
int 80h ;kernel system call Vc.A<(
Sj]k5(&
mov ebx,0 ;return value pJrc\`D
mov eax,1 ;sys_exit z~Ph=1O>p
int 80h ;kernel system call @[#U_T- I
;>QED
Rq gH,AN
x86 CPU,Windows,MASM32 |:$D[=
.386 y3F13 Z@%
.model flat,stdcall 3v)v92;
option casemap:none +(0Fab8g
;Include 文件定义 9r-]@6;
include windows.inc TC[_Ip&
include user32.inc lTJ1]7)
includelib user32.lib o90SXa&l/
include kernel32.inc Qj5~ lX`W
includelib kernel32.lib }ddwL
;数据段 xoF]r$sC8
.data e:hkWcV
szCaption db 'A MessageBox!',0 <MZ$ baK
szText db 'Hello,world!',0 &dF$:$'s
;代码段 Rn~FCj,-
.code vZj^&/F$=g
start: nv1'iSEeOl
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK oJe9H <
invoke ExitProcess,NULL P1;T-.X~&
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> g9|B-1[
end start [/hS5TG|7
(mz5vzyw
Z)EmX=
AWK mt3j- Mw
BEGIN { print "Hello, world!" } xnmIo?
hC
Oe4 l`
=2
0-p LCf
BASIC N(>a-a
传统版BASIC(例如GWBASIC): CXks~b3SD
g66=3c9</6
10 PRINT "Hello, world!" }c1Vu
20 END @GqPU,RO
1{4d)z UB
或在提示符输入: [Av#Z)R
fN~kdm.
?"Hello, world!":END Mnyg:y*=
biG=4?Xl
现代版BASIC(例如Quick BASIC): Tl5K'3
sY+U$BYB>
Print "Hello, world!" Kdh(vNB>
TJ[C,ic=D
以下的语句在Quick BASIC中同样有效: *cxmQ
4v9zFJ<Z
? "Hello,world!" # eqt{
Ou</{l/
V#[I/D
BCPL aSd$;t~
GET "LIBHDR" r/1:!Vu(
2K<rK(
LET START () BE w]GoeIg({
$( B3K!>lz
WRITES ("Hello, world!*N") 7Ipt~K}
$) R~8gw^w![
\kcJF'JFA0
H+vONg
Befunge i3t=4[~oL
"!dlrow olleH">v K];nM}<
, pw{3I 2Ix
^_@ @3KVYv,q
v#&r3ZW0
~fw 6sY#
Brainfuck a(Ka2;M4J
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< IK5FSN]s/
+++++++++++++++.>.+++.------.--------.>+.>. L,!?'.*/]
# m?GBr%k
"6_#APoP
C fgg^B[(Y
#include <stdio.h> `M/=_O3
yLCqlK
int main(void) zy`4]w$Lj+
{ fv$Y&_,5
printf("Hello, world!\n"); cnvxTI<
return 0; *zeY<6
} {dvrj<?
p 7IJ3YY
loN!&YceW
C++ (1JZuR<?c
#include <iostream> 3lH#+@
%HSS
x+2oR
int main() #S2LQ5U
{ ,OWdp<z
std::cout << "Hello, world!" << std::endl; w,TyV%b[_
return 0; ! P/ ]o
} =<fH RX`
H6E@C}cyM
,Hh7'`
C++/CLI MuB8gSu
int main() 3GqJs
{ @+~=h{jv<
System::Console::WriteLine("Hello, world!"); k|0Fa}Z[
} {:m5<6?x)
dVc;Tt
q# gZ\V$I
C# (C Sharp) ;5^grr@,4
class HelloWorldApp HRIf)n&~f
{ *V#v6r7<Y/
public static void Main() UXD?gK1
{ 7Z5,(dH>
System.Console.WriteLine("Hello, world!"); Ht+ng
} qY\zZ
} (y|{^@
@z"Zj 3ti
g!~&PT)*
COBOL hY+3PNiI@
IDENTIFICATION DIVISION. 2n+j.
PROGRAM-ID. HELLO-WORLD. H^xrFXg~z
$UW!tg*U&
ENVIRONMENT DIVISION. heoOOP(#
Q>7#</i\.
DATA DIVISION. $de_>
(Tp+43v
PROCEDURE DIVISION. RtH[OZu(8
DISPLAY "Hello, world!". %(;jx
STOP RUN. C&D]!ZvF
W~p^AHco`
Tj*o [2mD
Common Lisp PN2\:l+`
(format t "Hello world!~%") fC
xN!
y$s}-O]/-
A}C&WT~
DOS批处理 )<G>]IP<
@echo off d|TRP,y
echo "Hello, world!" seY0"ym&e
?"+'OOqik
8F($RnP3
Eiffel +P|$T:b
class HELLO_WORLD 7c!oFwM
X0b :Oiw
creation -`wGF#}y(=
make a8M.EFa:
feature DamLkkoA
make is 0K>rc1dy
local 9F0B-aZ
io:BASIC_IO 7}Z.g9<
do QI~s~j
!!io R*.XbkW~
io.put_string("%N Hello, world!") g _;5"
end -- make W6'+#Fp
end -- class HELLO_WORLD X^% I 3
-qfd)A6]
#@BM1BpQ
Erlang 1jo.d
-module(hello). Oz^+;P1
-export([hello_world/0]). ~U*2h =]
^*C6]*C}te
hello_world() -> io:fwrite("Hello, World!\n"). SZg+5MD;X
3Zsqx=w
m#,
F%s
Forth RUf,)]Vvk
." Hello, world!" CR /7@@CG6b
&N0W!
Mp75 L5
Fortran 25ul,t_Du
WRITE(*,10) s .^9;%@$J
10 FORMAT('Hello, World!') %xxe U
STOP Bp^>R`,
END *Dh.'bB!
T1PWFw\GH
b9EJLD
HTML 8/b_4!5c
<HTML> 8v1asFxs.
<HEAD> @l"GfDfL9
<TITLE> Hello World! </TITLE> _kH#{4`Hw
</HEAD> <S
$Z
<BODY> &IT'%*Y:V
<p>Hello World!</p> S7aS Ut!
</BODY> $f1L<euH
</HTML> ~/3cQN^
1}S_CR4XBs
Y+upZ@Ga
HQ9+ _<