“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。 ]!J 6S.@#+
OKfJ
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》。 vS-k0g;
._m+@Uy]H}
以下是用不同语言写成的Hello World程序的几个例子: "Mgx5d
Ada :mLcb.E
with Ada.Text_Io; use Ada.Text_Io; xwa5dtcng
procedure Hello is )/H=m7}1h
begin ;bVC7D~~4w
Put_Line ("Hello, world!"); ig:/60Z
end Hello; ]gYnw;W$
D3V5GQ\=
W
B)<B
汇编语言 W O W4c&
3jPua)=p
x86 CPU,DOS,TASM ~<Z;)e
MODEL SMALL )xiiTkJd5
IDEAL 5Qhu5~,K
STACK 100H C.V")D=
jC1mui|Y^
DATASEG h+Km |
HW DB 'Hello, world!$' 4g]Er<-P
9Vz1*4Ln
CODESEG zVe@`gc
MOV AX, @data e{8z1t20:
MOV DS, AX T9]|*~ ,T
MOV DX, OFFSET HW a&~_ba+
MOV AH, 09H MZf$8R
INT 21H \B"5 Kp<
MOV AX, 4C00H G?!b00H
INT 21H `HvU_ja;
END c%v[p8
%
fk4s19;?
IbC(/i#%`
x86 CPU,GNU/Linux,NASM Y3r m')c
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). IlsXj`!e
;Enter this into "hello.asm" then type: 5Z}]d@
;"nasm -f elf hello.asm" SCE5|3j
;"ld hello.o -o hello" -}0S%|#m
;"./hello" ?ix--?jl
sBY*9I
section .data ;data section declaration tWQ_.,ld
msg db 'Hello World!',0AH MB
:knj
len equ $-msg ;string length cVJ"^wgBt
')t
:!#
section .text ;code section declaration }$3eRu +
global _start ;entry point (start of execution) 6 ]W!>jDc
_start: mov edx,len ;string length #k8bZ?*:
mov ecx,msg ;string start ![3#([>4>
mov ebx,1 ;file handle: stdout xRYL{+
mov eax,4 ;sys_write V{;! vt~
int 80h ;kernel system call Xu`c_
Mit,X
mov ebx,0 ;return value 8*3o9$Pj
mov eax,1 ;sys_exit pDb5t>
int 80h ;kernel system call 'gk.J
\bqIe}3V7
PHl{pE*
x86 CPU,Windows,MASM32 &=H{ 36i@
.386 %"PG/avo
.model flat,stdcall s42M[BW]
option casemap:none ^pZ1uN!b
;Include 文件定义 D'Tb=
include windows.inc $9<q'hf<w
include user32.inc
@#K19\dQ
includelib user32.lib ES!$JWK|
include kernel32.inc /PG+ s6
includelib kernel32.lib PE3FuJGz
;数据段 QU^*(HGip
.data $Z6g/bD`E
szCaption db 'A MessageBox!',0 mZ
39 s
szText db 'Hello,world!',0 % eWzr
;代码段 ia
1Sf3
.code !!Z#'Wq
start: 4s nL((
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK zb.^ _A
invoke ExitProcess,NULL \O5`R-
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> |m7U^
end start %0C<_drW
u- PAi5&n
#j
-bT4!
AWK P'f
=r%
BEGIN { print "Hello, world!" } m7wD#?lm
CY#|VE M
r(xh5{^x
BASIC O6Bs!0,
传统版BASIC(例如GWBASIC): t-Rfy`I3
D7|[:``
10 PRINT "Hello, world!" MTo<COp($
20 END nmZz`P9g
RY'f%c
或在提示符输入: _@9[c9bO
kcKcIn{
?"Hello, world!":END xF:
O6KL
&<6E*qM
现代版BASIC(例如Quick BASIC): *,<A[XP
0"7%*n."2
Print "Hello, world!" I|69|^
K}"xZy Tm1
以下的语句在Quick BASIC中同样有效: x8k7y:
's>
? "Hello,world!" a5=8zO#%g
DhZuQpH
VZo[\sWf
BCPL ,Oa-AF/p
GET "LIBHDR" Ix@rn
/5Aum?~
LET START () BE r(;oDdVc
$( nVkx Q?2
WRITES ("Hello, world!*N") 6 "fYSn>
$) 't:$Lx
K
;\~otR^
l?pF?({
Befunge
0$)s? \
"!dlrow olleH">v FJ0Ity4u6
, {y)O?9q
^_@ MCOiB<L6
{$D[l
hj
Cbu/7z
Brainfuck MB.\G.bV
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< &_Kb;UVRj
+++++++++++++++.>.+++.------.--------.>+.>. ]-[M&i=+&
:5Vk+s]8
[U9b_`
C U-Ia$b-5!
#include <stdio.h> VP0q?lh
MmiC%"7wt
int main(void) wZ6D\I
{ rk$&sDc/3
printf("Hello, world!\n"); 9A_{*E(wd
return 0; xxjg)rVuy
} xC N6?
{gh41G;n
2gM=vaiH=
C++ kFKc9}7W
#include <iostream> _8t5rF
I5]=\k($
int main() <vMna< /d
{ K$v
SdpC
std::cout << "Hello, world!" << std::endl; rEz-\jLD~
return 0; +8qtFog$\g
} iV9wqUkMv
'a.n
%Aaf86pkp
C++/CLI )9/.K'o,dy
int main() A!EmJ
{ h OYm
=r
System::Console::WriteLine("Hello, world!"); 9R_2>BDn
} 9/A$3#wF
X&C&DTB
^(z7?T
C# (C Sharp) vJZ0G:1
class HelloWorldApp .OhpItn
{ m 2c>RCq
public static void Main() fH#yJd2?f
{ :QKxpHi
System.Console.WriteLine("Hello, world!"); t~5m[C[`w
} fM,!9}<
} e7e6b-"_2
*u
L Ooq
k(hYNmmo
j
COBOL HI iMq'H^
IDENTIFICATION DIVISION. WM y97*L<
PROGRAM-ID. HELLO-WORLD. +*u'vt?
590.mCm
ENVIRONMENT DIVISION. &gF*p
m]H[$Q
DATA DIVISION. OAigq6[,
$+(Df|)
PROCEDURE DIVISION. Mdk(FG(
DISPLAY "Hello, world!". bVfFhfh*
STOP RUN. e^v5ai
b-*3]gB
6P,vGmR
Common Lisp &UzeNL"]
(format t "Hello world!~%") :`u?pc27Sm
WFWQ;U{|
s
P=$>@3
DOS批处理 Y~I$goT
@echo off ]5(T{
echo "Hello, world!" _#[~?g`
8:#\g
pe^hOzVv
Eiffel \YUl$d0
class HELLO_WORLD )m8ve)l
8CXZ7 p
creation B$A`thQp
make 05sWN 0
feature Z_b^K^4
make is 1XfH,6\8i
local :~uvxiF
io:BASIC_IO Yz<,`w5/6~
do V+\L@mz;
!!io %>,B1nt
io.put_string("%N Hello, world!") F;
upb5
end -- make zzlqj){F
end -- class HELLO_WORLD jbQ N<`!
XKp$v']u
E lf'1
Erlang TtZZjeg+V
-module(hello). ~\vGwy
-export([hello_world/0]). ~bm
VpoI
}E
o\=>l7
hello_world() -> io:fwrite("Hello, World!\n"). PK&3nXF%4
]JGh[B1gh
FEOr'H<3x
Forth L >*
F8|g
." Hello, world!" CR OGl>i
M't~/&D#
(tZ#EL0
Fortran l'yX_`*Iq
WRITE(*,10) :+ASZE.
10 FORMAT('Hello, World!') U2Uf69R
STOP v?AQ&