“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。 9P3jx)K
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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》。 J#0oL_xY#
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以下是用不同语言写成的Hello World程序的几个例子: _d$0(
Ada XcS8{
with Ada.Text_Io; use Ada.Text_Io; +q==Y/z
procedure Hello is R?Dbv'lp>
begin 0 gyg
Put_Line ("Hello, world!"); J{gqm
end Hello; I$Q%iZ{
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1$q>\
汇编语言 8QeM6;^/5
eB:OvOol*^
x86 CPU,DOS,TASM UC,43 z
MODEL SMALL <"uT=]wZ=
IDEAL 'oZ/fUl|7
STACK 100H %`%xD>![
w$9aTL7
DATASEG oh '\,zpL
HW DB 'Hello, world!$' }LH>0v_<Y
gc:qqJi)X
CODESEG <ByR!Y
MOV AX, @data OE!:`Bo3T
MOV DS, AX ?-g=Rfpag
MOV DX, OFFSET HW g8yWFqE!T
MOV AH, 09H kO:iA0KUX
INT 21H w#Y<~W&
MOV AX, 4C00H l-yQ3/:
INT 21H T/
CI?sn
END `0rEV_$
b9[KdVsT6^
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x86 CPU,GNU/Linux,NASM rl^_RI
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). *M_.>".P
;Enter this into "hello.asm" then type: q/,W'lQ\;
;"nasm -f elf hello.asm" WV5gH*uUa
;"ld hello.o -o hello" <^&NA<2
;"./hello" R1z\b~@"
W"fdK_F\
section .data ;data section declaration ?aInn:FE
msg db 'Hello World!',0AH Urhh)i
len equ $-msg ;string length rN)T xH&*p
Bv$;yR
section .text ;code section declaration WigC'
global _start ;entry point (start of execution) M:W9h+z
_start: mov edx,len ;string length uXuMt
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mov ecx,msg ;string start 93%U;0w[Nw
mov ebx,1 ;file handle: stdout \xk`o5/{
mov eax,4 ;sys_write OGNjn9av
int 80h ;kernel system call *1V}vJvi
/sENoQR
mov ebx,0 ;return value xW{_c[oA
mov eax,1 ;sys_exit VrhG=CK
int 80h ;kernel system call lhAwTOn`Q
F;jl0)fBR=
OvU]|4h
x86 CPU,Windows,MASM32 g% :Q86u
.386 MJ>9[hs
.model flat,stdcall JoA^9AYhR
option casemap:none =^4 vz=2
;Include 文件定义 wH[@#UP3l
include windows.inc .eW}@1+[;
include user32.inc *&>1A A
includelib user32.lib eKpH|S!xU
include kernel32.inc HE+y1f]
includelib kernel32.lib 3a9Oj'd1M
;数据段 -MoI{3a
.data BCF-lrZ&
szCaption db 'A MessageBox!',0 m.-l&@I2/<
szText db 'Hello,world!',0 M)6_Tal
;代码段 4~4PZ
.code }4Lv-9s,
start: y[S5
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK c]F$$BT
invoke ExitProcess,NULL -G]\"ZGi
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Uf{cUY,j_
end start R>[2}R30
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\?h +
AWK ^x%yIS
BEGIN { print "Hello, world!" } uXW<8(
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sN 1x|pkN
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BASIC Lp20{R
传统版BASIC(例如GWBASIC): nK1XJp
:x]gTZ?
10 PRINT "Hello, world!" <6U{I '
20 END 8$-Wz:X&
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或在提示符输入: E}mnGe
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?"Hello, world!":END %FLz}QW*
{ ;);E
现代版BASIC(例如Quick BASIC): fXvJ3w(
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Print "Hello, world!" 8Z:NT_Ss
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以下的语句在Quick BASIC中同样有效: 37x2fnC
AF ZHS\
? "Hello,world!" "T?%4^:g
6cVaO@/(
/cexd_l|f
BCPL 1$?O5.X:
GET "LIBHDR" Xoml
oat*ORL
LET START () BE 6gY5v@!w
$( FgrOZI;_
WRITES ("Hello, world!*N") k4'rDJfB
$) o~<37J3).
fOm=#:O
X8<<;?L
Befunge s{x2RDAt
"!dlrow olleH">v w'~f Z*
, c_x6FoE;L
^_@ ^O6P Zm5J}
,E$^i~OO
|L.QIr,jCC
Brainfuck V9I5/~0c
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< ,;y5Mu8
+++++++++++++++.>.+++.------.--------.>+.>. U
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C gsGwf[X dJ
#include <stdio.h> ,m{Zn"?kS
\,!FL))yC
int main(void) Dh BUMDoB
{ mNc(
printf("Hello, world!\n"); 8GN0487H
return 0; HtgVD~[]
} ha1 J^e
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D!Owm&We
C++ R4 ;^R
#include <iostream> -1Yt3M&
`S2YBKz,1
int main() k+5:fB)z
{ 6vQAeuz<Fq
std::cout << "Hello, world!" << std::endl; {UQpD
return 0; WO/;o0{d\9
} `E8m>q Ss
2BS2$#c>
;VSHXU'H
C++/CLI U O YM
int main() P+:FiVj@~
{ w{?nX6a@p
System::Console::WriteLine("Hello, world!"); ((7~o?Vbg
} _&DI_'5q+
<8|vj2d2
_:x/\8P
C# (C Sharp) yeFt0\=H
class HelloWorldApp /i"vEI
{ 6k%N\!_TUW
public static void Main() sOa`T k
{ Wy.2*+5FX0
System.Console.WriteLine("Hello, world!"); _&FcHwRy
} FTI[YR8?Y
} x|<rt966A
d!{,[8&
bmr.EB/
COBOL J!3 X}@_N
IDENTIFICATION DIVISION. 3Ew-Ia%A
PROGRAM-ID. HELLO-WORLD. 7G.IGXK$
.n[!3X|d
ENVIRONMENT DIVISION. ^*#5iT8/
,'v ]U@WK
DATA DIVISION. j+\I4oFN
rBye%rQRq
PROCEDURE DIVISION. M&Sjo' ( .
DISPLAY "Hello, world!". !R-M:|
STOP RUN. |Kky+*
0V`s 3,k
<%#M&9d)E
Common Lisp P6&@fwJ<
(format t "Hello world!~%") !e*Q2H+
8fKt6T
x[U/
8#f&
DOS批处理 b?jRA^
@echo off y2gI]A
echo "Hello, world!" biKom|<nm
xgn@1.}G
6QkdH7Qf=
Eiffel RJYuyB
class HELLO_WORLD e7T"?s
"*CQ<@+
creation R$X1Q/#md
make ;XNe:g.CR
feature RMUR@o5N
make is bq/m?;
local oXRmnt
io:BASIC_IO 3?iRf6;n
do mYJ%gdTpo
!!io =kH7
io.put_string("%N Hello, world!") +kP)T(6
end -- make |s`j=<rNQI
end -- class HELLO_WORLD ()e.J
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fw$/@31AP?
Erlang :#s6,
-module(hello). |=L~>G
-export([hello_world/0]). };6[Byf
92!1I$zi
hello_world() -> io:fwrite("Hello, World!\n"). ?$i`K|
xpCzx=n3.m
u>o<ua
p
Forth S&_Z,mT./
." Hello, world!" CR E/2 kX 3}
^
cpQ*Fz
(jd)sf6Tj[
Fortran "| cNY_$&s
WRITE(*,10) ;U=IbK*
10 FORMAT('Hello, World!') Oya:{d&=
STOP :tU&d(8
END ^kJ(bBY
.l5y+a'
C1&~Y.6m
HTML is}6cR
<HTML> 1><@$kVMm~
<HEAD> jkCa2!WQ'i
<TITLE> Hello World! </TITLE> V'?bZcRr~
</HEAD> ~R^~?Y%+<
<BODY> dz@L}b*
<p>Hello World!</p> g$bbm}6S
</BODY> "P.H
</HTML> x&}pM}ea
ln4gkm<]t
uc;1{[5`1q
HQ9+ F]o&m::/K
H /$
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&/QdG= r +
INTERCAL Mh
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PLEASE DO ,1 <- #13 >%Rb}Ki4
DO ,1 SUB #1 <- #238 s
zBlyT
DO ,1 SUB #2 <- #112 U8TH} 9Q
DO ,1 SUB #3 <- #112 }]O*
yFR{j
DO ,1 SUB #4 <- #0 ;#-yyU
DO ,1 SUB #5 <- #64 LpRl!\FY$
DO ,1 SUB #6 <- #238 dJyf.VJ
DO ,1 SUB #7 <- #26 *Iy5 V7`KU
DO ,1 SUB #8 <- #248 |,!]]YO.V
DO ,1 SUB #9 <- #168 ;MRK*sfw{
DO ,1 SUB #10 <- #24 ;k1\-
DO ,1 SUB #11 <- #16 DD 8uG`<
DO ,1 SUB #12 <- #158 pc9m,?n
DO ,1 SUB #13 <- #52 Pnf|9?~$H
PLEASE READ OUT ,1 E|R^tETb
PLEASE GIVE UP bm/pLC6%.
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(4:&tm/;
Java H}v.0R
public class Hello %LI[+#QE
{ poLzgd
public static void main(String[] args) nE"##2X
{ KmF"Ccc
System.out.println("Hello, world!"); tc-pVw:TV
} ^(}D
} z"7I5N
_FpZc?=
~nQ= iB
JSP h"C7l#u
<% 9, A(|g
out.print("Hello, world!"); >WYiOXYv
%> #eRrVjbo
R'Gka1v
ub/Z'!
MIXAL &Tc:WD
TERM EQU 19 the MIX console device number oe (})M
ORIG 1000 start address XK*55W&og
START OUT MSG(TERM) output data at address MSG tW^oa
HLT halt execution r6,EyCWcCs
MSG ALF "MIXAL" X667*L^
ALF " HELL" 5OJ8o>BF
ALF "O WOR" $ ,:3I*}be
ALF "LD " 2OA0rH"v
END START end of the program )GT*HJR(vc
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B|\JGnNQ
Nuva 3t4i2]
<..直接输出..> 7dm:L'0
Hello, world! wOMrUWB0
dnwTD\),
<..或者..> FRBW(vKE
~nP~6Q'wSH
<. +6zW(Ql/
// 不带换行 DPWt=IFU
? "Hello, world!" m{v*\e7P
.8GX8[t
// 或者 K'6NW:zp~
i]cD{hv
// 带换行 iH`Q4
?? 'Hello, world!' S3?Bl'
.> 04j]W]8#
'!hA!eo>J
o^efeI
OCaml aAbK{=/y_!
let main () = Tqf:G4!
print_endline "Hello world!";; +nIjW;RU
7Mj:bm&9
B,5kG{2!
Pascal SzTa[tJ+
program Hello; CyV2=o!F w
begin Vsj1!}X:
writeln('Hello, world!'); 4@mK:v%
end. t?aOZps
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Perl R<<