“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。 &+/$~@OK
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将Hello World程序作为第一个学写的程序,现在已经成为一种传统。该程序最早出现在由Brian Kernighan和Dennis Ritchie写的计算机程序设计教程《C语言程序设计》。 RI BB*
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以下是用不同语言写成的Hello World程序的几个例子: t`1~5#?Du(
Ada
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with Ada.Text_Io; use Ada.Text_Io; FQcm= d_s
procedure Hello is Apkb!"}>
begin ~-~iCIaTb
Put_Line ("Hello, world!"); (AHTv8
end Hello; !@>:k3DC&
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汇编语言 P+,YWp
#*G}v%Ow/u
x86 CPU,DOS,TASM ^;@!\Rc
MODEL SMALL vQ[ TcV
IDEAL E%$[*jZ
STACK 100H ictOCF
xP 3>8Y
DATASEG SnoEi~Da
HW DB 'Hello, world!$' -U@ycx|r
UiZ1$d*
CODESEG t_qX7P8+'
MOV AX, @data ##U/Wa3
MOV DS, AX /q^_
'Lp
MOV DX, OFFSET HW `U{#;
MOV AH, 09H w^S]HzMd
INT 21H :{?Pq8jP
MOV AX, 4C00H ,MD>Jx|
INT 21H $ccCI
\
END i^eDM.#X
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x86 CPU,GNU/Linux,NASM u<HJFGLzI
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). [LS s|f
;Enter this into "hello.asm" then type: qtp-w\#S$
;"nasm -f elf hello.asm" D
\boF+^
;"ld hello.o -o hello" dkZ[~hEQG-
;"./hello" Rtai?
V}Pv}j:;
section .data ;data section declaration Rz33_ qA
msg db 'Hello World!',0AH ]kH8T'
len equ $-msg ;string length (-{.T
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section .text ;code section declaration ),0Ea~LB4
global _start ;entry point (start of execution) p0HcuB)Y
_start: mov edx,len ;string length d^`n/"Ice
mov ecx,msg ;string start X&,a=#C^
mov ebx,1 ;file handle: stdout 5WI0[7
mov eax,4 ;sys_write Chtls;Ph[
int 80h ;kernel system call ET|4a(x
, D`\
RV
mov ebx,0 ;return value S?Uvt?
mov eax,1 ;sys_exit JwUz4
int 80h ;kernel system call #F+b^WTR
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x86 CPU,Windows,MASM32 {|tMN,Z
.386 $HV`bJ5!L*
.model flat,stdcall U?ZxQj66}
option casemap:none |LE*R@|3$
;Include 文件定义 ^2mCF
include windows.inc +VHoYEW
include user32.inc `~LaiN.
includelib user32.lib }k6gO0z
include kernel32.inc 58Z,(4:E
includelib kernel32.lib _i0,?U2C
;数据段 s?&UFyYb,
.data G3t\2E9S
szCaption db 'A MessageBox!',0 `R:HMO[ow
szText db 'Hello,world!',0 9Oc(Gl5az
;代码段 !(qaudX{>k
.code 6CzN[R}
start: It8@Cp.dU
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK <Kq!)) J'
invoke ExitProcess,NULL -)E6{
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> +Z/aG k;
end start Z'y:r2{ql
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AWK o&rNM5:
BEGIN { print "Hello, world!" } ;3N>m|?D=
m H&WoL<K
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BASIC ],Y+|uX->
传统版BASIC(例如GWBASIC): gOn^}%4.I
(%|L23
10 PRINT "Hello, world!" 8MCSU'uQ
20 END XNB4KjT
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或在提示符输入: I)f54AX
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?"Hello, world!":END 4:qM'z
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现代版BASIC(例如Quick BASIC): $lAhKpdlW
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Print "Hello, world!" l1}HJmom
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以下的语句在Quick BASIC中同样有效: O`='8'6zW\
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? "Hello,world!" 8Sg:HU\
> 0NDlS%Q:
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BCPL \ dZD2e4
GET "LIBHDR" qeoj
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LET START () BE ;O *o
$( GZNfx8zsY+
WRITES ("Hello, world!*N") m*H6\on:
$) aZYs?b>Gm
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Befunge ~er4w+"
"!dlrow olleH">v OwG:+T_
, NFlrr*=t>
^_@ %z AN@
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^[-3qi
Brainfuck \d"M&-O
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< Mj- B;r
+++++++++++++++.>.+++.------.--------.>+.>. tvvRHvL
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C &io*pmUm6
#include <stdio.h> -S*MQA4
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int main(void) D*o[a#2_
{ EXTQ:HSES
printf("Hello, world!\n"); O=wu0n
return 0; 'P<T,:z?
} =;@?bTmqD
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C++ tz"zQC$
#include <iostream> b>"=kN/
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int main() s9}V nNr
{ !JVpR]lWS
std::cout << "Hello, world!" << std::endl; 5_ioJ
return 0; #u6ZCv7u
} +b6kU{
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C++/CLI Y'%k
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int main() G/5]0]SO
{ =f{YwtG
System::Console::WriteLine("Hello, world!"); {pW(@4U
} / qo`vk A
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C# (C Sharp) G u P1
class HelloWorldApp 7e
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{ q(cSHHv+
public static void Main() W-ll2b
{ !]z6?kUK
System.Console.WriteLine("Hello, world!"); S`?cs^?
} gw);b)&mx
} 9Wi+7_)
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COBOL WF0[/Y
IDENTIFICATION DIVISION. A('_.J=
PROGRAM-ID. HELLO-WORLD. 5W=jQ3 C
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ENVIRONMENT DIVISION. -{'WIGm
C [h^bBq
DATA DIVISION. dF/HKBJ
-YHyJs-bU
PROCEDURE DIVISION. JHZ`LWq
DISPLAY "Hello, world!". |ydOi&
STOP RUN. X0QLT:J b
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Us*"g{PQ
Common Lisp ^|0>&sTHOH
(format t "Hello world!~%") qkbxa?&X
IrZ!.5%tV
;3H#8x-
DOS批处理 p +>vX
X
@echo off #XJ`/\E]
echo "Hello, world!" zU$S#4/C
t*'U|K4L/
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Eiffel }yW*vy6`
class HELLO_WORLD =`MU*Arcs[
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creation N}tiaL4
make ?H2{R:
feature h (1 }g/
make is dW8M^A&
local
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io:BASIC_IO :>'4@{'
do {a `#O9
!!io {v>orP?
io.put_string("%N Hello, world!") D7"RZF\)
end -- make YzD6S*wb
end -- class HELLO_WORLD {KO+t7'Q
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Erlang uNn]hl|x
-module(hello). t$W~X~//
-export([hello_world/0]). R%Y#vUmBV{
;.<0ln V
hello_world() -> io:fwrite("Hello, World!\n"). $ }D9)&f;
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CkJ\v%JAW
Forth c<gvUVHIxR
." Hello, world!" CR _PR><L_
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C3p/|{TP
Fortran .% rB-vO:g
WRITE(*,10) \-?@
&' :
10 FORMAT('Hello, World!') If*t$f>y4N
STOP v3vQfcxR
END ^Q'^9M2)
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HTML Jm l4EW7
<HTML> (\=iKE4#
<HEAD> k5%:L2FO
<TITLE> Hello World! </TITLE> M!e$h?vB
</HEAD> 2X t$KF,?
<BODY> ))qOsphN
<p>Hello World!</p> 4x'N#m{p
</BODY> U%~L){<V[
</HTML> SqF9#&F
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rprtp5C g
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8"\g?/
INTERCAL C/w!Y)nB=
PLEASE DO ,1 <- #13 Xt!%W
DO ,1 SUB #1 <- #238 $O/@bh1@p
DO ,1 SUB #2 <- #112 %;Dp~T`0
DO ,1 SUB #3 <- #112 7Q(5Nlfcz
DO ,1 SUB #4 <- #0 itmdY!;<
DO ,1 SUB #5 <- #64 dsh S+d
DO ,1 SUB #6 <- #238 OEN!~-u
DO ,1 SUB #7 <- #26 2sOV3~bB
DO ,1 SUB #8 <- #248 vZQ'
DO ,1 SUB #9 <- #168 uNV\_'9>Y
DO ,1 SUB #10 <- #24 nz=X/J6
DO ,1 SUB #11 <- #16 6] ~g*]T
DO ,1 SUB #12 <- #158 :$`"M#vMX
DO ,1 SUB #13 <- #52 `]{/(pIgW;
PLEASE READ OUT ,1 W\tSXM-Hg
PLEASE GIVE UP $1h , <$5H
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T@ [*V[
Java cG"+n@\
public class Hello H
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{ Q599@5aS
public static void main(String[] args) u5,\Kz
{ YuZxKuGy
System.out.println("Hello, world!"); @GB~rfB[
} XCGJ~
} [a&|c%h
Lwg@*:`d
0koC;(<n
JSP "Yo.]PU
<% pL{h1^O}
out.print("Hello, world!"); J8T?=%?=
%> EMDsi2
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~
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MIXAL eJ+uP,$
TERM EQU 19 the MIX console device number }K!)Z}8
ORIG 1000 start address ng-g\&-
START OUT MSG(TERM) output data at address MSG z]NzLz9VfL
HLT halt execution `|1#Vuk
MSG ALF "MIXAL" |g3a1El
ALF " HELL" F0O/SI(cA
ALF "O WOR" a|*{BlY
ALF "LD " Hq{i-z+
END START end of the program w!0`JPu
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Nuva ;_.%S *W\
<..直接输出..> !18M!8Xea
Hello, world! [f'V pId8
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<..或者..> |z!Y,zaX
p?mQ\O8F
<. ohHKZZ
// 不带换行 3aL8 gE
? "Hello, world!" 'nOc_b0
ltKUpRE\?
// 或者 gg>O:np8
6n{`t/
// 带换行 ~mqiXr8
?? 'Hello, world!' 9Ytf7NpR
.> !^dvtv`K
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bp06xHMu
OCaml ohFUy}y
let main () = : GZx-
print_endline "Hello world!";; jpl"KN?X
%<|w:z$vp
Jl-Lz03YG
Pascal Pa.D+
program Hello; }{J5)\s9
begin kxJ! #%w
writeln('Hello, world!'); d]JiJgfa%
end. %1uY
jt?937{
pXfg{2
Perl 2qY`*Y.2
#!/usr/local/bin/perl [xF (t @p
print "Hello, world!\n"; qRXb9c
]-Z="YPY
@S /jVXA
PHP ; ]*
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<?php H\OV7=8
print("Hello, world!"); [
7W@/qqv
?> gK {-eS
-lKk.Y.}r
L'dR;T[;
Pike (x{6N^J.t
#!/usr/local/bin/pike RR u1/nam
int main() 1LbJR'}
{ T)"B35
write("Hello, world!\n"); }H[v!l@
return 0; T}ZUw;}BL
} b~khb!]
1}A1P&2>
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PL/I sLGut7@Sg
Test: procedure options(main); ;VY0DAp{
declare My_String char(20) varying initialize('Hello, world!'); n%o"n?e
put skip list(My_String); eIEr\X4\~~
end Test; 1epj/bB&