“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。 jvR(e"
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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》。 jd5kkX8=
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以下是用不同语言写成的Hello World程序的几个例子: w9"~NK8xzM
Ada hRB?NM
with Ada.Text_Io; use Ada.Text_Io; :YkAp9civ
procedure Hello is qvWi;
begin e87a9ZPm
Put_Line ("Hello, world!"); Gi@c`lRd1
end Hello; hiV!/}'7
T <k;^iqR
y.8nzlkE{
汇编语言 e_!Z-#\J%
a!u5}[{
x86 CPU,DOS,TASM T?Z^2.Pvc
MODEL SMALL pJl/d;Cyrb
IDEAL LH_U#P`E
STACK 100H 14uv[z6
1!U:M8T|
DATASEG X6w+L?A
HW DB 'Hello, world!$' .tHc*Eh
5efN5Kt
CODESEG !v%>W< 3Q
MOV AX, @data \WdSj
MOV DS, AX &~B8~U4%
MOV DX, OFFSET HW ,(sE|B#s
MOV AH, 09H :w|=o9J
INT 21H /$\8?<Pc".
MOV AX, 4C00H @ %q>Jd
INT 21H ku}`PS0UGd
END R/E6n &R
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?Oy0p8
x86 CPU,GNU/Linux,NASM $txF|Fj]^A
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). pAA)?/&oKV
;Enter this into "hello.asm" then type: s!MD8ia
;"nasm -f elf hello.asm" ;GOu'34j
;"ld hello.o -o hello"
{;u+? uY
;"./hello" `e3$jy@
SG0PQ
section .data ;data section declaration ]Z=al`-
msg db 'Hello World!',0AH -lv(@7o~
len equ $-msg ;string length 1Q9Hs(s
lt2MB#
section .text ;code section declaration E&@#*~
global _start ;entry point (start of execution) }o[<1+W(.
_start: mov edx,len ;string length rb'mFqg*u
mov ecx,msg ;string start QSM3qke
mov ebx,1 ;file handle: stdout iG~&uEAJ
mov eax,4 ;sys_write n6Z!~W8
int 80h ;kernel system call @k'V`ZQF
I=P<RG7j)
mov ebx,0 ;return value G'dN<Nw6
mov eax,1 ;sys_exit gnxD'1_
int 80h ;kernel system call CM[83>
O1DUBRli!q
asmu<
x86 CPU,Windows,MASM32 Nvh&=%{g
.386 b9-3
.model flat,stdcall (mI590`f
option casemap:none S}]B |Q
;Include 文件定义 Bx$?*y&f!v
include windows.inc Hfo<EB2Y9N
include user32.inc 0E
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includelib user32.lib q0vZR"y
include kernel32.inc ]A#:Uc5
includelib kernel32.lib g:G5'pZf
;数据段 &_hEM~{
.data _RZ"WA^[
szCaption db 'A MessageBox!',0 #
kNp);
szText db 'Hello,world!',0 aU[!*n 4Ux
;代码段 l7 @cov
.code V*Xr}FE
start: Acd@BL*
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK 7-u'x[=m
invoke ExitProcess,NULL
! R3P@,j
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> m!P<#
|V
end start .j**>&7L
3=} P l,
asLrXGGyT
AWK 0]=Bqyg
BEGIN { print "Hello, world!" } gOah5*Lj
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BASIC N`N?1!fM<}
传统版BASIC(例如GWBASIC): _p'@.P
PDCb(5
10 PRINT "Hello, world!" +*Uv+oC|
20 END 0)
F\aJ4Y
~%f$}{
或在提示符输入: 3Lq9pdM>2@
Fr;
's(^
?"Hello, world!":END ;fN^MW@&[
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现代版BASIC(例如Quick BASIC): f\.y z[
#e,TS`"eD
Print "Hello, world!" BF;}9QebmS
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以下的语句在Quick BASIC中同样有效: _9p79S<+
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? "Hello,world!" ,tg(aL
|_-w{2K
*vEj\
BCPL V`W ']
GET "LIBHDR" gFu,q`Vf*
;FF+uK
LET START () BE a l6y=;\jZ
$( e5n]@mu%
WRITES ("Hello, world!*N") m.! M#x2!
$) / #rH18
'gg<)Bd
DG0I-"s
Befunge !IO\g"y~|%
"!dlrow olleH">v {x_cgsn
, M6^
\LtFt
^_@ llWY7u"
v>Kh5H5e~
)cZHBG.0H
Brainfuck 'd&d"E[
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< 'g'RXC}D>
+++++++++++++++.>.+++.------.--------.>+.>. /~f[>#
q 5z^y(Sv
qBh@^GxY),
C T6=|)UTe1
#include <stdio.h> g}gGm[1SUo
gW--[
int main(void) [)GRP
{ eB1NM<V
printf("Hello, world!\n"); ^"54Q^SH
return 0; _X;,,VEV!
} j%-Ems*H
M<*Tp^Y'
&ZkJ,-
C++
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#include <iostream> KB :JVK^ <
UIU:^g0
int main() yUpN`;
{ A%F8w'8(
std::cout << "Hello, world!" << std::endl; R%\3[
return 0; 7 vFmB
} n_RZ:<Gr
gT$WG$^i
rg
k1.0U0
C++/CLI qCfEv4
int main() )xa)$u
{ ol/@)k^s>
System::Console::WriteLine("Hello, world!"); 8Nyz{T[
} DT>`.y%2W
,\P|%yv
stUv!
C# (C Sharp) %H"
class HelloWorldApp Kb<c||2Nh5
{ &&P9T/Zks
public static void Main() ]w;t0Bk
{ <ml?DXT
System.Console.WriteLine("Hello, world!"); JU^Y27
} Ua
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} P[q>;Fx*
cyB+(jLHDs
iBbaHU*V
COBOL @#t<!-8d
IDENTIFICATION DIVISION. U!o
PROGRAM-ID. HELLO-WORLD. Sq_.RU
z8}QXXa
ENVIRONMENT DIVISION. 2ns,q0I
A
XdV>6<gf{
DATA DIVISION. 36+/MvIT
^$O(oE(D
PROCEDURE DIVISION. jFe8s@7
DISPLAY "Hello, world!". Eze w@*(
STOP RUN. PDA9.b<q0
(n?f016*%d
';Nc;9
Common Lisp 27c0wzq
(format t "Hello world!~%") K\xM%O?
H.{Fw j4
e\[q3J
DOS批处理 >\pF5a`
@echo off YQ?hAAJ
echo "Hello, world!" O]hUOc`k
'h6G"=+
*'aJO}$
Eiffel ^i_v\E[QU
class HELLO_WORLD oz{X"jfu
T|S-?X,
creation !BkE-9v?w
make ?87\_wL/j
feature G5t7KI
make is #BBDI
local D60quEe3%
io:BASIC_IO P8dMfD*"E
do ,.*Df)+
!!io '\8YH+%It
io.put_string("%N Hello, world!") ]O:8o<0
end -- make O
]
!tK
end -- class HELLO_WORLD $=E4pb4Y
2Q@na@s
,D`jlY-1l
Erlang m ne)c[Qn
-module(hello). jmq^98jB
-export([hello_world/0]). }15&<s
|#cqxr "
hello_world() -> io:fwrite("Hello, World!\n"). C7m/<
}E(w@&
h~
_i::vg
Forth Hc\@{17
." Hello, world!" CR oupWzjo
a6z0p%sIZ
pwHe&7e#
Fortran yc7b%T*Y
WRITE(*,10) L6nsVL&
10 FORMAT('Hello, World!') [W$Mn.5<s
STOP [>p!*%m
END @YaI5> ,/
3A"TpR4f`
|;Jt*
_
HTML s1W n.OGR4
<HTML> y7#+VF`xf
<HEAD> =eW4?9Uq
<TITLE> Hello World! </TITLE> ^hZ0"c
</HEAD> AdDR<IW
<BODY> FPK=Tr:b
<p>Hello World!</p> R'B_YKHBY
</BODY> 5WfZd
</HTML> ak:f4dEd
#G0'Q2
l>
H'PP~
HQ9+ s@%>
H #Cs/.(<
67T.qX2I$
a $'U?%
INTERCAL {y@8E>y5$
PLEASE DO ,1 <- #13 c1_Zi
DO ,1 SUB #1 <- #238 o\Fv~^
DO ,1 SUB #2 <- #112 jb/C\2U4)
DO ,1 SUB #3 <- #112 Snmv
DO ,1 SUB #4 <- #0 P>~Usuf4
DO ,1 SUB #5 <- #64 QRl+7V
DO ,1 SUB #6 <- #238 Bo
ywgL|
DO ,1 SUB #7 <- #26 UL~~J[1r
DO ,1 SUB #8 <- #248 +Gy9K
DO ,1 SUB #9 <- #168 ?@MY +r_G
DO ,1 SUB #10 <- #24 L?8OWLjRy
DO ,1 SUB #11 <- #16 HtE^7i*_
DO ,1 SUB #12 <- #158 S%?>Mh?g
DO ,1 SUB #13 <- #52 ;cL+=!
PLEASE READ OUT ,1 D2o|.e<r
PLEASE GIVE UP dKDCJt]t
dn=srbJ
4C:dkaDq]
Java $'!n4}$}
public class Hello 2|RxowXZ"
{ WyQ8}]1b
public static void main(String[] args) z8D,[`
{ TOP,]N/F
H
System.out.println("Hello, world!"); qnd] UUA^
} @#o7U
} fyx Q{J
91a);d
SZ4@GK
JSP f::^zAV
<% dKchQsgCg
out.print("Hello, world!"); :=q9ay
%> Q3t%JP>;g
9/&1lFKJ
/@&uaw
MIXAL :G^4/A_
TERM EQU 19 the MIX console device number FO]f 4@
ORIG 1000 start address vj#m#1\f
START OUT MSG(TERM) output data at address MSG 3XbFg%8YG
HLT halt execution l`j@QP
MSG ALF "MIXAL" RdpOj >fT
ALF " HELL" ~7\`qH
ALF "O WOR" _\,4h2(
ALF "LD " Xh~oDnP
END START end of the program D[YdPg@-
P=9sP:[f6
<P Vmr2Jp"
Nuva hSh^A5
/
<..直接输出..> >Ij#+=
Hello, world! H3JDA^5
8L@@UUjr
<..或者..> AMK3I`=8WO
= j
l(Q
<. f,@~@f
X
// 不带换行
pG /g
? "Hello, world!" yW"}%)
d
@$!"}xDR'
// 或者 $7Lcn9?G
cf_X=;yaqy
// 带换行 lcoJ1+`C
?? 'Hello, world!' M|$A)D1
.> >4T7DMy
<g8{LG0
<2+FE/3L
OCaml Lg6>\Z4
let main () = f5nAD
print_endline "Hello world!";; # kmI#W"^
m{6*ae
fvDcE]_%H
Pascal Oo%%f+
program Hello; 8O*O5
begin KH[Oqd
writeln('Hello, world!'); D4+OWbf6
end. )q%DRLD'G
*>j4tA{b@v
|Gb~[6u
Perl T!5g:;~y >
#!/usr/local/bin/perl X*:)]p(R
print "Hello, world!\n"; d8f S79
4+0:(=>[%
e(-Vp7vXG
PHP G9>
0w)r
<?php 9kU|?JE
print("Hello, world!"); ;cWFh4_
?> u O~MT7~[X
D)JI11a<
UrB{jS?
Pike |F>'7JJJ
#!/usr/local/bin/pike I [v~nY~l`
int main() , @6_sl
{ "1$hfs
write("Hello, world!\n"); If. hA}
return 0; gMZ
`
} -M?s<R[&
uTUkRqtD!
[6a&9#[A
PL/I Aj2yAg
Test: procedure options(main); V8J!8=2
declare My_String char(20) varying initialize('Hello, world!'); sZ7BBJX2K
put skip list(My_String); \Ot,&Z k2
end Test; >PiEu->P,
Y-:{a1/RKo
t{ScK%S6
Prolog @{UtS2L
goal 0N*~"j;r#M
write("hello,world!"). i!EN/Bd
:+\B|*T2.L
H!dg(d^
Python *H%Jgz,
#!/usr/local/bin/python !BW6l)=L
print "Hello, world!" N[AX]gOJ
`G^MTDp?L+
;?0k>
REXX 3)+}2
say "Hello, world!" D>Dch0{H,:
r%~/y
zHvG3Ed@
Ruby 0 lsX~d'W
#!/usr/bin/ruby %B'*eBj~fw
print "Hello, world!\n" ns,qj}#
n$}Cj}eju
d@-bt s&3
Scheme E)w^odwMU
(display "Hello, world!") A296f(
(newline) 9My
|G)M6
(:]on^|
B'Ll\<mq@
sed (需要至少一行输入) &}G2;O}3
sed -ne '1s/.*/Hello, world!/p' ~4fjFo&