“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。 r6<ArX$Yl
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将Hello World程序作为第一个学写的程序,现在已经成为一种传统。该程序最早出现在由Brian Kernighan和Dennis Ritchie写的计算机程序设计教程《C语言程序设计》。 1w6.
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以下是用不同语言写成的Hello World程序的几个例子: W|FNDP0
Ada ud!r*E
with Ada.Text_Io; use Ada.Text_Io; C=M?
procedure Hello is FJ nG<5Rh
begin MEDskvBG
Put_Line ("Hello, world!"); Z|f^nH#-C
end Hello; &AN%QhI
l'P[5'.
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汇编语言 WJP`0f3
pvI&-D #}
x86 CPU,DOS,TASM '$lw[1
MODEL SMALL d9ZDpzxB
IDEAL 7=AO^:=bx
STACK 100H C[^a/P`i
<`^>bv9
DATASEG X6n|Xq3k
HW DB 'Hello, world!$' s;~J2h[
#=>kw^5
CODESEG ye9QTK6$,
MOV AX, @data A/r;;S)%2
MOV DS, AX F&-5&'6G+
MOV DX, OFFSET HW gDgP;id
MOV AH, 09H CA'hvXb.
INT 21H P2s^=J0@
MOV AX, 4C00H `7+tPbjs
INT 21H CAcOWwDm
END sz){uOI
q|m#IVc
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x86 CPU,GNU/Linux,NASM ntd
":BKi
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). Nj"_sA
p
;Enter this into "hello.asm" then type: FC|y'j 0
;"nasm -f elf hello.asm" !NQf< ch
;"ld hello.o -o hello" ^2P;CAjj-
;"./hello" k)o7COx
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section .data ;data section declaration m mw)C"
msg db 'Hello World!',0AH KX&Od@cQ$
len equ $-msg ;string length a'(lVZA;
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section .text ;code section declaration gqKC 4'G0
global _start ;entry point (start of execution) 7~QwlU3n<F
_start: mov edx,len ;string length zcbA)
mov ecx,msg ;string start 9;'>\ImI
mov ebx,1 ;file handle: stdout V~tu<"%
mov eax,4 ;sys_write E9
:|8#b
int 80h ;kernel system call xQcMQ{&;
b3jU~L$
mov ebx,0 ;return value }6b7a1p
mov eax,1 ;sys_exit ?3e!A9x
int 80h ;kernel system call \Mh4X`<e
_,Io(QS
KG7X8AaK#
x86 CPU,Windows,MASM32 !'c6 Hs
.386 %t(, *;
.model flat,stdcall H znI R
option casemap:none qugPs(uQ
;Include 文件定义 -bIpmp?
include windows.inc oC;l5v<
include user32.inc ^[SbV^DOL
includelib user32.lib gw*yIZ @3)
include kernel32.inc 9^=t@
includelib kernel32.lib gGceK^#
;数据段 vs)HbQ
.data QB
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szCaption db 'A MessageBox!',0 d60Fi#3d
szText db 'Hello,world!',0 \^^hG5f
;代码段 4%Z\G@0<'
.code P,+0
start: 3L\s8O
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK O=9V X
invoke ExitProcess,NULL p>w~T#17
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> \5v=pDd4g
end start p3'mJ3MA
&'oacV=
5Rt0h$_J
AWK HtS1N}@
BEGIN { print "Hello, world!" } rVIb'sa
/s-jR]#VA
5O4&BxQ~}
BASIC t8wz'[z
传统版BASIC(例如GWBASIC): -;DE&~p
oVxV,oH(
10 PRINT "Hello, world!" tkUW)ScJ
20 END y}H*p
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或在提示符输入: ~,3v<A[5Vi
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?"Hello, world!":END zMHf?HQ-Z
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现代版BASIC(例如Quick BASIC): IU;pkgBj0Y
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Print "Hello, world!" t=@Jw
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以下的语句在Quick BASIC中同样有效: n?ZH2dI\0
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? "Hello,world!" h-)A?%Xt
J 6d n~nPK
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BCPL emDvy2uA#
GET "LIBHDR" 8-l)TTP&.
C.TCDl
LET START () BE Wcay'#K,
$( $dWl A<u
WRITES ("Hello, world!*N") 0e5-\a
$) NiQc2\4%
e&]`X HC9
xF :poi
Befunge zI*/u)48
"!dlrow olleH">v PtVNG
, t+TbCe
^_@ EVE xL
:Y)kKq d
=Q8^@i4[&D
Brainfuck c6}xnH
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< "T=3mv%S
+++++++++++++++.>.+++.------.--------.>+.>. |@n{tog+-
:J)lC =
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C DF&jZ[##
#include <stdio.h> dXcMysRc%&
3B_} :
int main(void) 4Hd@U&E
{ 2|_Jup
printf("Hello, world!\n"); JNz"lTt>[g
return 0; NB yN}e
} MBTt'6M
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C++ DEeL48{R
#include <iostream>
!NY^(^
5Vm}<8{
int main() QCY{D@7T
{ !A<XqzV]
std::cout << "Hello, world!" << std::endl; NS/L! "g
return 0; nO7o7bc
} D+U/ ]sW
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C++/CLI 4lKbw4[a
int main() Gw\HL
{ r.G/f{=<@
System::Console::WriteLine("Hello, world!"); v'~nABYH
} a0j.\g
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C# (C Sharp) b2@x(5#
class HelloWorldApp e~~k}2~
{ F vk:c-
public static void Main() F'_8pD7
{ DlkKQ
System.Console.WriteLine("Hello, world!"); .aH?H]^
} }Knq9cf
} (uxQBy
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!'t2
COBOL <"Cwy0V kp
IDENTIFICATION DIVISION. pnw4QQ9
PROGRAM-ID. HELLO-WORLD. S^"e5n2
z00:59M4
ENVIRONMENT DIVISION. {%k;V ~
/!uBk3x:
DATA DIVISION. 5dEO_1q
%
(tz]!Aa{s
PROCEDURE DIVISION. z4`n%~w1b
DISPLAY "Hello, world!". KX}dn:;(3
STOP RUN. ZV^J5wYE
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MifgRUe
Common Lisp HNyDWD)_
(format t "Hello world!~%") t-'GRme
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E4@fP]R+
DOS批处理 `hf9rjy4
@echo off \ozy_s[
echo "Hello, world!" jmzvp6N$8
m@2xC,@
Bw7:ry
Eiffel %((3'le
class HELLO_WORLD C`<} nx1
{:8[Mdf
creation TUn@b11
make ")gCA:1-
feature $^aXVy5p
make is 3Qr!?=nf
local &rWJg6/
io:BASIC_IO EUS]Se2
do l"!;Vkg.5
!!io <RsKV$Je
I
io.put_string("%N Hello, world!") Kd1\D!#!6
end -- make X}FF4jE]D(
end -- class HELLO_WORLD ,#;ahwU~s
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jCv+m7Z
Erlang &WU*cfJn)A
-module(hello). _1%^ibn
-export([hello_world/0]). R~(.uV`#j
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hello_world() -> io:fwrite("Hello, World!\n").
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Vta;ibdeqW
Forth 5DUPsV
." Hello, world!" CR qr;" K?NX
3AL=*qq
Q>*K/%KD
Fortran mpAh'f4$*
WRITE(*,10) LMzYsXG*[
10 FORMAT('Hello, World!') DNO%J^
STOP phSP+/w
END % 7:
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HTML %6:2cR
<HTML> PelV67?M
<HEAD> #(4hX6?5AI
<TITLE> Hello World! </TITLE> Om{ML,d
</HEAD> CI{TgL:l
<BODY> <7Lz<{jaJ
<p>Hello World!</p> JPzPL\
</BODY> 9:~^KQ{?
</HTML> o>%W7@Pr
sB!A:
htlWC>*
HQ9+ 'z5 ;o:T
H 2*FZ@?X@r
3=I Q
C@W0fz
INTERCAL 5toNEDN
PLEASE DO ,1 <- #13 46`{mPd{aO
DO ,1 SUB #1 <- #238 K_.x(Z(;4
DO ,1 SUB #2 <- #112 (dZ&Af
DO ,1 SUB #3 <- #112 jGPs!64f)
DO ,1 SUB #4 <- #0 nTlrG6
DO ,1 SUB #5 <- #64 /UAj]U
DO ,1 SUB #6 <- #238 ^jA^~h3(W
DO ,1 SUB #7 <- #26 PxY"{-iAM
DO ,1 SUB #8 <- #248 z [{%.kA
DO ,1 SUB #9 <- #168 @@&;gWr;
DO ,1 SUB #10 <- #24 $6Psq=|
DO ,1 SUB #11 <- #16 i:To8kdO
DO ,1 SUB #12 <- #158 `Y9@ ?s Q
DO ,1 SUB #13 <- #52 D=]P9XDvb.
PLEASE READ OUT ,1 Wc[)mYOSuO
PLEASE GIVE UP AU2Nmf?]%
v4^VYi,.-
0\A[a4crj
Java s5@^g8(+C
public class Hello W;W\L? r
{ !;oBvE7Kh
public static void main(String[] args) 7 c7SU^hD
{ GM~jR-FZ
System.out.println("Hello, world!"); ::w%rv
} kY&j~R[C
} :l{-UkbB
W=+ag<@
SM?<woY=*
JSP d7Z\
<% u]-$]zIH
out.print("Hello, world!"); \!Pm^FD
.
%> wvY$s;
T8 k o P
&[xJfL
MIXAL VPzdT*g]
TERM EQU 19 the MIX console device number ZgtOy|?|
ORIG 1000 start address wu3ZSLY
START OUT MSG(TERM) output data at address MSG >d|W>|8e
HLT halt execution K+H82$
#
MSG ALF "MIXAL" Rlu;l
ALF " HELL" s RB8 jY
ALF "O WOR" E O^0sF<
ALF "LD " kS>j!U(%d
END START end of the program Z~<V>b
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IAQ=d4V&
Nuva S]+}Zyg
<..直接输出..> M_DkjuR
Hello, world! 54-x 14")
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<..或者..> 420K fVA
+=v|kd
<. A2 rRYzN;
// 不带换行 B _ >|Mo/
? "Hello, world!" mJ HX
]b)(=-;>
// 或者 B Xp3u|t
J2-xnUa]7
// 带换行 6AY%onY
?? 'Hello, world!' L'(^[vR(
.> D!CGbP(
OXo-(HLE
@g{
"
E6
OCaml ,wjL3c
let main () = W\/0&H\i
print_endline "Hello world!";; AkF3F^
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5 ,HNb
Pascal n!2|;|$}Z
program Hello; i?]!8Ji
begin @%K 8oYK
writeln('Hello, world!'); m`|+_{4[n
end. j56Y,Tm
#&^+hx|
qH$p]+Rk 5
Perl ft5 Bk'ZJ
#!/usr/local/bin/perl <qu\q \
print "Hello, world!\n"; -HOCxR
Z|.z~53;
1*5n}cU~
PHP fw5AZvE6$
<?php 3!I8J:GZ:
print("Hello, world!"); l[gL(p"W
?> 5|Uub,
iw%DQ }$
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Pike -kkXyO8js
#!/usr/local/bin/pike |( KM 8
int main() B}p/ ,4x6
{ V&G_Bu~
write("Hello, world!\n"); Eyuc~[
return 0; ,QDq+93
} }-!$KR]:s
NEvt71k
}w$/x<Q[
PL/I '(Pbz
Test: procedure options(main); p^2pv{by
declare My_String char(20) varying initialize('Hello, world!'); ~0`Pe{^*
put skip list(My_String); Z`[j;=[
end Test; 0xsvxH"*
S5;q)qz2J
db`<E
<
Prolog K_xn>
goal CZ@M~Si_
write("hello,world!"). oR~+s&c