“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。 0~S<}N
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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》。 (Iq\+@xE=
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以下是用不同语言写成的Hello World程序的几个例子: &YMVoyVD
Ada
Y-{spTI
with Ada.Text_Io; use Ada.Text_Io; WI~%n
procedure Hello is VmT5?i
begin ^X;>?_Bk
Put_Line ("Hello, world!"); eD(a
+El}
end Hello; T ]zjJwa
g1{wxBFE
G?_,(
汇编语言 oaXD^H\
sO6t8)$b
x86 CPU,DOS,TASM C9iG`?
MODEL SMALL `fV$'u
IDEAL #62ww-E~
STACK 100H T
a[74;VO
@"EX%v.
DATASEG ;yXnPAtJ
HW DB 'Hello, world!$'
<?7~,#AK
U D(#u3z
CODESEG `dNb%f>
MOV AX, @data
Q$zlxn 7\
MOV DS, AX ,Z^GN%Q7a
MOV DX, OFFSET HW h/VYH(Tj
MOV AH, 09H
CFA>
INT 21H R"=M5
MOV AX, 4C00H |V7a26h
INT 21H (1HN, iJy
END 0zxeA+U
MtB:H*pM
;Dgp
!*v=
x86 CPU,GNU/Linux,NASM #P@r[VZ{6
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). {p\KB!Y-
;Enter this into "hello.asm" then type: 24Tw1'mW
;"nasm -f elf hello.asm" 18HHEW{
;"ld hello.o -o hello" u'b_zlW@
;"./hello" +~v(*s C
%jf gncW
section .data ;data section declaration dEp=;b s
msg db 'Hello World!',0AH hzH5K
len equ $-msg ;string length !{XO#e
-XyuA:pxx
section .text ;code section declaration H}~^,B2;
global _start ;entry point (start of execution) OE"Bb
_start: mov edx,len ;string length *Wa u7
mov ecx,msg ;string start M:$nL
mov ebx,1 ;file handle: stdout }.vy|^X
mov eax,4 ;sys_write s#fmGe"8
int 80h ;kernel system call 9|m L
X[ (J!"+
mov ebx,0 ;return value [)u(\nfGX
mov eax,1 ;sys_exit F{+`F<r
int 80h ;kernel system call <coCu0
*~L]n4-
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x86 CPU,Windows,MASM32 `!8Z"xD
.386 mx4*zj
.model flat,stdcall <i6M bCB
option casemap:none 19t*THgq
;Include 文件定义 3Cl9,Z"&6$
include windows.inc Uf<vw3
include user32.inc 8gxLL59
includelib user32.lib q}i87a;m
include kernel32.inc y^rg%RV
includelib kernel32.lib #*/h*GNMs
;数据段 Z#O3s:`
.data _JDr?Kg
szCaption db 'A MessageBox!',0 PsnU5f)`
szText db 'Hello,world!',0 C=cTj7Ub
;代码段 ~] 2R+
.code CQ[-Cp7
start: 9R[','x
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK $C/Gn~k 5
invoke ExitProcess,NULL S@)bl
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> XEEbmIO*<9
end start A{%;Hd`0/
-`UlntEdZ:
s`YuH <8
AWK F! e`i-xt
BEGIN { print "Hello, world!" } TbVL71c
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]IV;>94[
BASIC O :^[4$~
传统版BASIC(例如GWBASIC): &/F[kAy
qI^jwl|k
10 PRINT "Hello, world!" -c@ 5qe>
20 END PgAfR:Y!
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或在提示符输入: 9iCud6H,h
6%#'X
?"Hello, world!":END tV9C33
a)Ek~{9
现代版BASIC(例如Quick BASIC): I>#ChV)(#
<UdD@(iZ#
Print "Hello, world!" ~S!kn1&O
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以下的语句在Quick BASIC中同样有效: %#a%Luq
Hrnql
? "Hello,world!" j.}V~Sp*
Nk4_!
|lwN!KVQ,
BCPL JrTBe73.]j
GET "LIBHDR" 6DW|O<k^j
R
<\Yg3m8
LET START () BE 9m4rNvb
$( s=
fKAxH
WRITES ("Hello, world!*N") @#c6\$
$) m!g8@YI
pNFIO
t:(
jt--w"|-r
Befunge -RQQ|:O$
"!dlrow olleH">v P;LZ!I
, qu+2..3
^_@ TWEqv<c
);DIrA
`kSCH; mwP
Brainfuck Xy<f_
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< t|QMS M?s
+++++++++++++++.>.+++.------.--------.>+.>. oZ:F3 GQ4Q
ueBoSZRWX
4>C=:w
C MToQ8qKs
#include <stdio.h> .G~5F- 8'
'LLx$y.Ei[
int main(void) _PXo'*j
{ 5q`)jd !*)
printf("Hello, world!\n"); {OrE1WHB
return 0; RsfTUb)<
} 5udoZ>T
2{I z
^X%4@,AE
C++ d}cJ5!d
#include <iostream> '|N4fbZd
IFofFXv_
int main() O>5 u5n
{ NOp=/
std::cout << "Hello, world!" << std::endl; e*6` dz@
return 0; G%jJ>T4
} Q8cPKDB
, %O3^7i
uN3J)@;_
C++/CLI ,ri--<
int main() l]y%cJ~$'D
{ aB6LAb2z;T
System::Console::WriteLine("Hello, world!"); 91d`LsP
} V9+"CB^
bvS\P!m\c
C,vc
aC?
C# (C Sharp) 7d8qs%nA
class HelloWorldApp S{7ik,Gdg
{ pbxcsA\
public static void Main() Lj-&TO}OZ
{ aq/Y}s?
System.Console.WriteLine("Hello, world!"); DB'KIw
} x0$:"68PW
} dS_)ll.6z
{59VS
Nl
LEnP"o9ZW
COBOL 7h&`BS
IDENTIFICATION DIVISION. GiO#1gA
PROGRAM-ID. HELLO-WORLD. OrJlHMz
)TG0m= *
ENVIRONMENT DIVISION. LNxE-Dp
Xb:BIp!e
DATA DIVISION. fA0=Y,pzv
JgKZ;GM:W
PROCEDURE DIVISION. #]a51Vss
DISPLAY "Hello, world!". vek:/'sj3p
STOP RUN. maEpT43f
+Z~!n
_JIUds5
Common Lisp 4yZ+,hqJ<9
(format t "Hello world!~%") l%U_iqL&
%R*vSRG/U
9Y@?xn.\
DOS批处理 lF"(|n"R
@echo off S@zkoj@
echo "Hello, world!" {2gd4[:
-Dq:Y,%q
q;0&idYC
Eiffel 9f%y)[ \
class HELLO_WORLD O0(Q0Ko
F@'rP++4
creation RHl=$Hm.%
make v;}`?@G
feature [x p,&
make is !5SQN5K
local )Z]y.W )
io:BASIC_IO UK_aqB
do DcR}pQ(e
!!io 5h=TV
io.put_string("%N Hello, world!") =<zSF\Zr_
end -- make C"^hMsU8
end -- class HELLO_WORLD X8SRQO^
\pD=Lv9
QUZQY`'@
Erlang N|O]z
-module(hello). +\8 krA
-export([hello_world/0]). n$|c{2]=
z vb}p
hello_world() -> io:fwrite("Hello, World!\n"). 9C)3
b3
/b:t;0G
i Kk"j
Forth +=~%S)9F
." Hello, world!" CR 5-WRv;
[aM'
3AQ>>) T~
Fortran X*9N[#wu6
WRITE(*,10) }wOpPN[4
10 FORMAT('Hello, World!') :{WrS
STOP %::deV7
END dbuJ~?D,
6+B{4OY
"$IXZ
HTML =i^<a7M~
<HTML> 4,F3@m:<
<HEAD> Cq*}b4^;
<TITLE> Hello World! </TITLE> 9kX=99kf[
</HEAD> M |({
4C
<BODY> %w8GGm8^/
<p>Hello World!</p> _:Jp*z
</BODY> 71.\`'
</HTML> oAZF3h]po
lHKf#|
-?YT Q@ W
HQ9+ 5%Oyvt]}2
H ){
}uI7\\S
#3Ej0"A@-B
INTERCAL >'}=.3\
PLEASE DO ,1 <- #13 8hK P
DO ,1 SUB #1 <- #238 pgd8`$(Q
DO ,1 SUB #2 <- #112 RE>ks[
DO ,1 SUB #3 <- #112 %t~SOkx
DO ,1 SUB #4 <- #0 b WbXh$
DO ,1 SUB #5 <- #64 E<<p_hX8R
DO ,1 SUB #6 <- #238 U7B/t3,=U
DO ,1 SUB #7 <- #26 QSF"8Uk
DO ,1 SUB #8 <- #248 { 8f+h
DO ,1 SUB #9 <- #168 S'!q}|7X3
DO ,1 SUB #10 <- #24 =%3b@}%HqS
DO ,1 SUB #11 <- #16 `e $n$Bh
DO ,1 SUB #12 <- #158 ~3bZ+*H>
DO ,1 SUB #13 <- #52 h^A3 0f_x
PLEASE READ OUT ,1 pFJQ7Jlx
PLEASE GIVE UP ! FR%QGn1
6mu<&m@
)W1(tEq59
Java JS/M~8+Et
public class Hello )Ab6!"'
{ q1f=&kGX~
public static void main(String[] args) .B'UQ|NR
{ 7Y32p'
System.out.println("Hello, world!"); 1@%B?
} BeI;#m0
} N~):c2Kp<9
ss`P QN
p"[O#*p
JSP ms}f>f=
<% `s`C{|wv
out.print("Hello, world!"); /}w#Jk4pD
%> y7JZKtsFA
WgA`kT
^Ue0mC7m
MIXAL bR`rT4.F
TERM EQU 19 the MIX console device number JAlU%n?R
ORIG 1000 start address U~*c#U"bh
START OUT MSG(TERM) output data at address MSG w{3Q( =&
HLT halt execution pd4cg?K
MSG ALF "MIXAL" g@@&sB-A"
ALF " HELL" l] _b;iux
ALF "O WOR" gwSN>oj
&
ALF "LD " /Fv/oY
END START end of the program 0%s3Mp6H
q]6_rY.
I#U>5"%\a
Nuva 2'wr={>W
<..直接输出..> u R\m`
Hello, world! PMgQxM*h
%M{k.FE(
<..或者..> Mlv<r=E
)?w&oIj5
<. ~{kM5:-iw
// 不带换行 /
l".}S
? "Hello, world!" M o}H_8y
.3VK;au\\
// 或者 #>8T*B
e,f ;
// 带换行 W.A1m4l58R
?? 'Hello, world!' t`"^7YFS>
.> -@''[m .*
=-$!:W~
OlMBMUR:
OCaml #B @X
let main () = i`prv&
print_endline "Hello world!";; VpkD'<