“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。 1 rmN)
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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》。 M
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以下是用不同语言写成的Hello World程序的几个例子: L!W5H2Mc
Ada 'Ya- ;5Y]
with Ada.Text_Io; use Ada.Text_Io; KU0;}GSNX}
procedure Hello is Yceex}X*5
begin x A ZRl
Put_Line ("Hello, world!"); 0vz!)
end Hello; H%Sx*|
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汇编语言 2f0_Xw_V_
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x86 CPU,DOS,TASM Ef6LBNWY.
MODEL SMALL ~!dO2\X+
IDEAL (7PVfS>;
STACK 100H E+aE5wmr
Luh*+l-nO
DATASEG y=WCR*N
HW DB 'Hello, world!$' cT^x^%
B\7 80p<
CODESEG t4,(W`
MOV AX, @data cy_zEJjbD
MOV DS, AX ^t)alNGos
MOV DX, OFFSET HW O$&4{h`
MOV AH, 09H CY.i0
INT 21H v/C*?/ ~
MOV AX, 4C00H )RwO2H
INT 21H
-+.-Ab7
END hrnY0
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x86 CPU,GNU/Linux,NASM v%2Jm!i+
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). WPNvZg9*c
;Enter this into "hello.asm" then type: 2k""/xMF'
;"nasm -f elf hello.asm" ,Z]4`9c
;"ld hello.o -o hello" g(zoN0~
;"./hello" WO6; K]
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section .data ;data section declaration ;!N_8{
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msg db 'Hello World!',0AH xHdv?69,
len equ $-msg ;string length !p"Ijz5
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section .text ;code section declaration x\XOtjJr
global _start ;entry point (start of execution) lF1ieg"i M
_start: mov edx,len ;string length 0f|nI8,z
mov ecx,msg ;string start ig,v6lqhM
mov ebx,1 ;file handle: stdout $t$YdleIH
mov eax,4 ;sys_write xYWg1e$k
int 80h ;kernel system call B6a
~Aq$GH4
mov ebx,0 ;return value <)9E .h
mov eax,1 ;sys_exit <q#/z&F!
int 80h ;kernel system call ?f[U8S}
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x86 CPU,Windows,MASM32 FiJU
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.386 (&Z`P
.model flat,stdcall })@LvYK
option casemap:none MDKiwT@#
;Include 文件定义 6P*2Kg`
include windows.inc ^c]lEo
include user32.inc :>otlI<0t
includelib user32.lib IGtqY8
include kernel32.inc (!`]S>_w9
includelib kernel32.lib #AUz.WHD
;数据段 ~/kx
.data -J=N
szCaption db 'A MessageBox!',0 rn8t<=ptH3
szText db 'Hello,world!',0 #>\+6W17U
;代码段 qy|si4IU8,
.code VjVL/SO/
start: O:,Fif?;
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK ]):kMRv
invoke ExitProcess,NULL F45UO%/P
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> zmMz6\ $
end start ^iq$zHbc0u
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AWK 0<T/P+|
BEGIN { print "Hello, world!" } *z
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BASIC .)eX(2j\
传统版BASIC(例如GWBASIC): ^d2bl,1
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10 PRINT "Hello, world!" cU'^
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20 END C6C7*ks
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或在提示符输入: q9&d24|
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?"Hello, world!":END 77ID
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现代版BASIC(例如Quick BASIC): GM<r{6Qy
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Print "Hello, world!" _=eeZ4f
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以下的语句在Quick BASIC中同样有效: UE9r1g`z
b 64~Y|8
? "Hello,world!" -Fj:^q:@u
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BCPL hD:$Sv/H
GET "LIBHDR" <2a7>\74E0
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LET START () BE !mX 2
$( _ADK8a6%)
WRITES ("Hello, world!*N") pPdOwK#
$) 9H<6k*
Lc<C1I 5=
W|FP j^*t
Befunge GUyc1{6
"!dlrow olleH">v vK?{Z^J][
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^_@ v&EHp{8Qd
*?`:=
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Brainfuck yU(k;A-
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< 2Xm\; 7
+++++++++++++++.>.+++.------.--------.>+.>. e>kw>%3bl9
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C S/
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#include <stdio.h> hD>O LoO
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int main(void) b:S#Sz$
{ nO~TW
printf("Hello, world!\n"); "yI)F~A
return 0; '%>$\Lv
} Q
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C++ IdlW[h3`[
#include <iostream> m3k}Q3&6Z
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int main() #isBE}sT{
{ * SG0-_S
std::cout << "Hello, world!" << std::endl; 10JxfDceD
return 0; +x!V;H(
} H!ZPP8]j>
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C++/CLI @^vVou_
int main() g|PVOY+|^
{ I hvL2zB
System::Console::WriteLine("Hello, world!"); J0}OmNTzD
} RkN a;j)t
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C# (C Sharp) eD* "#O)W
class HelloWorldApp ".qh]RVjV
{ +[JGi"ca
public static void Main() .( vS/
{ eA>O<Z1>
System.Console.WriteLine("Hello, world!"); '$M=H.
} :Q\b$=,:
} C,w$)x5kls
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COBOL n2R{$^JxO
IDENTIFICATION DIVISION. }Y5Sf"~M
PROGRAM-ID. HELLO-WORLD. gUCv#:
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ENVIRONMENT DIVISION. oSt-w{!
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DATA DIVISION. r}P{opn$t
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PROCEDURE DIVISION. DY6wp@A
DISPLAY "Hello, world!". GP uAIoBo
STOP RUN. ?0+D1w
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Common Lisp ]7ROCJ;
(format t "Hello world!~%") u|\Lb2Kb:
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~)}npS;
DOS批处理 D:llGdU#2
@echo off
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echo "Hello, world!" POc<
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E'e#axF;
Eiffel Hq^sU%
class HELLO_WORLD gQ*0Mk
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creation iwL\H a
make a[)in ,3
feature 'u$$scGt
make is ;t@zH+*}
local . #;ZM[v
io:BASIC_IO `jJ5us
do ~;|
!!io GLL,
io.put_string("%N Hello, world!") $CO^dFf
end -- make U\y];\~H
end -- class HELLO_WORLD 5 %q26&
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cp2e,%o
Erlang H.j(hc'
-module(hello). 6d,jR[JP
-export([hello_world/0]). q?&vV`PG5
Tm@mk
hello_world() -> io:fwrite("Hello, World!\n"). (eN\s98)/
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Forth uU6+cDp
." Hello, world!" CR 7[:9vY
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Fortran $\$5::}r
WRITE(*,10) <O>r e3s
10 FORMAT('Hello, World!') 9>qR6k?
STOP W=o90TwbN
END %?_pSH}$!
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HTML R\MM2_I
<HTML> %K
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<HEAD> |~CN]N
<TITLE> Hello World! </TITLE> x9~d_>'A
</HEAD> 7f'9Dm`
<BODY> RT8xU;
<p>Hello World!</p> X&t)S?eCos
</BODY> 2Q)"~3
</HTML> rFSLTbTf
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gc7S_D~;
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INTERCAL 3.?PdK&C
PLEASE DO ,1 <- #13 Ej
ip%m
DO ,1 SUB #1 <- #238 4\Y2{Z>P?
DO ,1 SUB #2 <- #112 g` 6Xrf
DO ,1 SUB #3 <- #112 _NA0$bGN9
DO ,1 SUB #4 <- #0 a{QHv0goG
DO ,1 SUB #5 <- #64 %s%v|HDs
DO ,1 SUB #6 <- #238 AIF?+i%H}
DO ,1 SUB #7 <- #26 jhUab],
DO ,1 SUB #8 <- #248 pA+W
8v#*
DO ,1 SUB #9 <- #168 sbrU;X_S
DO ,1 SUB #10 <- #24 (+38z)f
DO ,1 SUB #11 <- #16 {$ HW_\w
DO ,1 SUB #12 <- #158 &|IY=$-
DO ,1 SUB #13 <- #52 UC;_}>
PLEASE READ OUT ,1 b"t!nfgo
PLEASE GIVE UP ~a4htj
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Java WsTbqR)W%
public class Hello ?7'uo$
{ HjbC>*
public static void main(String[] args) 0~H(GG$VH
{ k ;R*mg*K
System.out.println("Hello, world!"); Ti!j
} QSW62]=vV
} N't*e Ci
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S`BLwnU`#
JSP kV(}45i]s
<% 9l@VxX68M
out.print("Hello, world!"); Lf&p2p?~c
%> ?0WJB[/
`B"=\0
+n %uIv
MIXAL m\__Fl
TERM EQU 19 the MIX console device number =GTltFqI1
ORIG 1000 start address GNA:|x
START OUT MSG(TERM) output data at address MSG Rgw\qOb
HLT halt execution H*!j\|v0
MSG ALF "MIXAL" d%\{,
ALF " HELL" wLPL9
ALF "O WOR" F"#bCnS
ALF "LD " [bIdhG
END START end of the program M])Y|}wv8
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VJS|H!CH
Nuva ~(aQ!!H6
<..直接输出..> cXFNX<
Hello, world! 0
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<..或者..> Gmi4ffIb3
``)ys^V
<. n|Iy
// 不带换行 3<1Uq3Pa
? "Hello, world!" w-2p'u['Z
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// 或者 Y'&A~/Adf
4*g`!~)
// 带换行 H2l/9+
?? 'Hello, world!' :[m;#b
.> rJ4O_a5/
Ig t:M[
/
CDQ}C=4
OCaml _{)e\n
let main () = y~w2^VN=
print_endline "Hello world!";; w7$*J:{
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D'F=v\P
Pascal X#j-Ld{j
program Hello; )d!,,o
begin 6e(|t2^
writeln('Hello, world!'); tI|?k(D
end. `$\g8Mo
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FN NEh
Perl 1@6dHFA`o
#!/usr/local/bin/perl UB }n=
print "Hello, world!\n"; v=E V5#A
0'wB':v
qv y~b
PHP cu5Yvp
<?php "jH=O(37
print("Hello, world!"); "G-}
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?> 1-r#v
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H'Bor\;[>
Pike O l1[ o
#!/usr/local/bin/pike U8KB@E
int main() vyP3]+n
{ w>>)3:Ytd
write("Hello, world!\n");
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return 0; o7)<