“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。 JN;92|x
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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》。 xi5/Wc6
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以下是用不同语言写成的Hello World程序的几个例子: /9/svPc]
Ada ;DWtCtD
with Ada.Text_Io; use Ada.Text_Io; \@]/ks=K
procedure Hello is 9$0-UUCk
begin s':fv[%
Put_Line ("Hello, world!"); joaf0
end Hello; yl63VX8w}
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汇编语言 slSQ \;CDA
Qg]8~^Q<
x86 CPU,DOS,TASM nsChNwPX
MODEL SMALL xgl~4
IDEAL eM)E3~K:2
STACK 100H NXhQdf
Zkn$D:
DATASEG iy&*5U
HW DB 'Hello, world!$' <a>\.d9#)7
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CODESEG b}P5*}$:9"
MOV AX, @data 5 fGUJ[F=
MOV DS, AX \VW&z:/*pZ
MOV DX, OFFSET HW 1iOQ8hD
MOV AH, 09H Mp;yvatO
INT 21H [E_+fT
MOV AX, 4C00H N_jCx*.G
INT 21H r Ntc{{3_
END ~i)O^CKq
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;bJ2miO"e
x86 CPU,GNU/Linux,NASM Ve<3XRq|8
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). -BWkPq!
;Enter this into "hello.asm" then type: !X 3/2KRP7
;"nasm -f elf hello.asm" p^_E7k<ag
;"ld hello.o -o hello" bI^zwK,@4
;"./hello" ?Z}n0E `
j\w>}Pc
section .data ;data section declaration yK"OZ2Mv
msg db 'Hello World!',0AH >-0b@ +j
len equ $-msg ;string length I+ipTeB^
,z}wR::%
section .text ;code section declaration o6e6Jw
global _start ;entry point (start of execution) $"Oy }
_start: mov edx,len ;string length ;]<{<czc
mov ecx,msg ;string start B!jINOg
mov ebx,1 ;file handle: stdout )]2yTG[
mov eax,4 ;sys_write @a.Y9;O
int 80h ;kernel system call wE K@B&DV
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mov ebx,0 ;return value h3^&,U
mov eax,1 ;sys_exit -la~p~8
int 80h ;kernel system call Is6<3eQ\x
l6.#s3I['
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x86 CPU,Windows,MASM32 f[)_=T+
.386 s)]Z*#ZZ
.model flat,stdcall M,[u}Rf^w
option casemap:none )Qve[O
;Include 文件定义 CL(,Q8yG
include windows.inc ^&t(O1.-
include user32.inc I>b-w;cC
includelib user32.lib +NRn>1]
include kernel32.inc
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includelib kernel32.lib kP%Hg/f/Ot
;数据段 DI=Nqa)r
.data HF-Msu6
szCaption db 'A MessageBox!',0 t`{^gt
szText db 'Hello,world!',0 sV7dgvVd
;代码段 lj"L Q(^
.code P=&J e?
start: *VT@
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK }I7/FqrD
invoke ExitProcess,NULL ;??wLNdf-
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Mj$dDtw
end start u!2.[CV
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pt8X.f,iA
AWK zx\N^R;Jq
BEGIN { print "Hello, world!" } RM53B
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BASIC 5Ah-aDBj
传统版BASIC(例如GWBASIC): N$ZThZqqv
5=Bj?xb$'
10 PRINT "Hello, world!" w
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20 END uK]@!gz
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或在提示符输入: zTY|Z@:
okX\z[X
?"Hello, world!":END x&R&\}@G m
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现代版BASIC(例如Quick BASIC): HSx~Fs^J
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Print "Hello, world!" Sm#;fx+
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以下的语句在Quick BASIC中同样有效: U-TwrX
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? "Hello,world!" *Rshzv[
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t Zj6=#
BCPL #ITx[X89|
GET "LIBHDR" 0c1}?$f[?%
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LET START () BE #I@]8U#,":
$( ;:*o
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WRITES ("Hello, world!*N") {549&]/o
$) "}K/ b
BmrP]3 W?
}Iub{30mp
Befunge 8BNsh[+
"!dlrow olleH">v ^Gv<Xl
, sVkR7
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^_@ XrC{{K
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Wnl8XHPn
Brainfuck !5`}s9hsF_
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< h.
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+++++++++++++++.>.+++.------.--------.>+.>. LH4-b-
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C N l_!%k:
#include <stdio.h> qx{.`AaZW
&7Ixf?e!K
int main(void) 8<P $E!
{ 2x e_Q70II
printf("Hello, world!\n"); kVU|k-?2
return 0; OJ UM Y<5
} =&"Vf!7YR7
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:G^`LyOM
C++ ENC_#-1x
#include <iostream> =(v!pEF
SX^fh.
int main() ^&&dO*0{
{ g) v"nNS
std::cout << "Hello, world!" << std::endl; n{BC m %
return 0; ejo4mQ]a
} j)-D.bY0
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?xQlX%&`6
C++/CLI d?N"NqaN
int main() kTiQO2H
{ 1>%SSQ
System::Console::WriteLine("Hello, world!"); zp4ru\
} ?%Y?z]L#
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ts;_T..L
C# (C Sharp) 7gVWu"
class HelloWorldApp )SA$hwR
{ c;U\nC<Y
public static void Main() *~!xeL
{ $:u,6|QsS=
System.Console.WriteLine("Hello, world!"); 2Fx<QRz
} 18[f_0@ #
} f=K1ZD
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Od&M^;BQ
COBOL WKah$l
IDENTIFICATION DIVISION. nNhN:?
PROGRAM-ID. HELLO-WORLD. Z$zUy|s[
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ENVIRONMENT DIVISION. Z~ ?:r
]3={o3[:
DATA DIVISION. i"rMP#7
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PROCEDURE DIVISION. _9z/>e
DISPLAY "Hello, world!". OM4s.BLY
STOP RUN. do[K-r
CCEx>*E6c
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Common Lisp W77JXD93
(format t "Hello world!~%") #eUfwd6.Y
~5!ukGK_
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DOS批处理 ,6M-xSDs
@echo off ,j_{IL690
echo "Hello, world!" &us8,x6yg
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K&)a3Z=(.
Eiffel ]#BXaBVMY
class HELLO_WORLD ]Rj"/(X,
Q|ik\
creation UkqLLzL
make 2#(7,o}Y5
feature B8_l+dXO
make is +XpRkX&-
local ]UgAz
io:BASIC_IO ~JZLfw
do /yykOvUO
!!io '|d (<.[
io.put_string("%N Hello, world!") Nb];LCx
end -- make %M`|0g}!
end -- class HELLO_WORLD %<M<'jxSca
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tLvli>y@
Erlang D~?kvyJ
-module(hello). %I.{umU
-export([hello_world/0]). -:~`g*3#
`PW=_f={
hello_world() -> io:fwrite("Hello, World!\n"). he+[
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|wLQ)y*
Forth cbwzT0
." Hello, world!" CR *$cp"
xc/|#TC8?
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Fortran l?R_wu,Q
WRITE(*,10) 0l:5hD,)F
10 FORMAT('Hello, World!') eXOFA d]>u
STOP X~DXx/9
END P9>C!0 -x
6AwnmGL(;;
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HTML H9>&"=".
<HTML> A N%.LK
<HEAD> 2ga}d5lu
<TITLE> Hello World! </TITLE> RyhR#
</HEAD> xg^fM@#m
<BODY> b@X@5SJFW
<p>Hello World!</p> YpKai3 B
</BODY> d#d~t[=
</HTML> E{6}'FG+A
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[.Y=~)7FB
HQ9+ ho20>vw#
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m[bu(q z
V")Q4h{
INTERCAL F0JFx$AoD
PLEASE DO ,1 <- #13 ]OrFW4tiE
DO ,1 SUB #1 <- #238 r{TNPa6!
DO ,1 SUB #2 <- #112 x$Oz0 [
DO ,1 SUB #3 <- #112 )KuvG:+9W
DO ,1 SUB #4 <- #0 ?oJ~3Kg
DO ,1 SUB #5 <- #64 BE+YqT
DO ,1 SUB #6 <- #238 qN QsU
DO ,1 SUB #7 <- #26 [T%blaSX
DO ,1 SUB #8 <- #248 @TprSd
DO ,1 SUB #9 <- #168 =B:poh[u
DO ,1 SUB #10 <- #24 wMUnZHd{|
DO ,1 SUB #11 <- #16 C\; 8l}t
DO ,1 SUB #12 <- #158 ^0&] .m
DO ,1 SUB #13 <- #52 /iN\)y#u1
PLEASE READ OUT ,1 h|H;ZC(B
PLEASE GIVE UP GMNb;D(>K
E\zhxiI
L[bGO|O
Java BJE <~"
public class Hello bT8UmR98
{ =_H39)|T
public static void main(String[] args) {
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{ KwHOV$lD;
System.out.println("Hello, world!"); <S}qcjG
} kW~F*
} ?c2TT
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JSP @Y,F&8a$
<% uqUo4z 5T
out.print("Hello, world!"); Z:v1?v
%> _UBI,Dg]
'=H^m D+gl
qck/b
MIXAL +B m+Pj>
TERM EQU 19 the MIX console device number @ 7?_Yw
ORIG 1000 start address )1vojp
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START OUT MSG(TERM) output data at address MSG oW[,EW+u
HLT halt execution &rl>{Uvq
MSG ALF "MIXAL" $Y`aS^IW
ALF " HELL" U.aa iX7
ALF "O WOR" *X\c
$=*
ALF "LD " W.|6$hRl)
END START end of the program LasH[:QQQ
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p.9v<I%0
Nuva y]l"u=$Tr{
<..直接输出..> <J)A_Kx[57
Hello, world! 2mUu3fZ
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<..或者..> C6VoOT)\
*r`Yz}
<. 9^='&U9sr
// 不带换行 MuobMD}jqe
? "Hello, world!" R`Lm"5w
p*0Ve21i,
// 或者 #CPP dU$
;}~=W!yz
// 带换行 $5b|@
?? 'Hello, world!' 'y?|shV{]
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.=yus[,~
8zC k9&
OCaml m GhJn
let main () = &-fx=gq=
print_endline "Hello world!";; Jg:-TK/
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yj~"C$s
Pascal mM}Ukmy
program Hello; !XG&=Rd?
begin pxxFm~"d
writeln('Hello, world!'); 'pY;]^M
end. O ->eg
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2&0<$>
Perl mi<D
bnou
#!/usr/local/bin/perl \+3Wd$I
print "Hello, world!\n"; -o_TC
#/Fu*0/)`
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PHP Yp]G)}'R
<?php "Y]ZPFh#.
print("Hello, world!"); EQ7n'Wqq
?> ;_/q>DR>,3
8 %j{4$
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Pike 9.zQ<