“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。 4
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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》。 E_#?;l>
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以下是用不同语言写成的Hello World程序的几个例子: ,-SWrp`f
Ada x-~=@oiv
with Ada.Text_Io; use Ada.Text_Io; CTQJ=R"
procedure Hello is 1P G"IaOb
begin #1p\\Av
Put_Line ("Hello, world!"); q!YAA\'31
end Hello; tcJN`N
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汇编语言 C ~04#z_$
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x86 CPU,DOS,TASM h*\u0yD)
MODEL SMALL j7J'd?l
IDEAL qTe@?j
STACK 100H wotw nE
4-oaq'//BT
DATASEG |u+!CR
HW DB 'Hello, world!$' A5Lzd
YRU95K[
CODESEG (btmg<WT"
MOV AX, @data -[[(Zx
MOV DS, AX `pqTiV
MOV DX, OFFSET HW #g<6ISuf
MOV AH, 09H P7$/yBI U
INT 21H Qw<&N$
MOV AX, 4C00H ZWQ/BgKB
INT 21H ]D,\(|
END LX#gc.c
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>+):eBL
x86 CPU,GNU/Linux,NASM kq@~QI?9
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). R$;TX^r'o&
;Enter this into "hello.asm" then type: `yO'-(@"gY
;"nasm -f elf hello.asm" ]88qjKL
;"ld hello.o -o hello" eg24.W9c
;"./hello" Nt/hF>"7
L2OR<3*|Av
section .data ;data section declaration e0hY
msg db 'Hello World!',0AH tTWEhHQ`
len equ $-msg ;string length B:Hr{%O
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section .text ;code section declaration ],Yy)<e.
global _start ;entry point (start of execution) 3cF8DNh
_start: mov edx,len ;string length <,\U,jU_
mov ecx,msg ;string start nkf7Fq}
mov ebx,1 ;file handle: stdout (p<pF].
mov eax,4 ;sys_write lSc=c-iOv
int 80h ;kernel system call kT:I.,N
qw{`?1[+
mov ebx,0 ;return value zjOOEvi
mov eax,1 ;sys_exit tS-gaT`T
int 80h ;kernel system call l]OzE-*$b
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x86 CPU,Windows,MASM32 GxEShSGOE
.386 RGrQ>'RL
.model flat,stdcall s;$f6X
option casemap:none `evF?t11X
;Include 文件定义 bkS"]q)>
include windows.inc pTXF^:8
include user32.inc jcb&h@T8kv
includelib user32.lib _,/~P)
include kernel32.inc 5JHEBw5W%
includelib kernel32.lib {`,)<R>}
;数据段 X-#&]^d
.data w 5?D]u
szCaption db 'A MessageBox!',0 Hq!|r8@6
szText db 'Hello,world!',0 ]qxl^Himq
;代码段 jFUpf.v2
.code h9/fD5
start: 1GK>&;
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK ZvMU3])u
invoke ExitProcess,NULL *l=(?Pe<
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> kDI?v6y5
end start s^K2,D]P
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AWK ?{e}ouKYX1
BEGIN { print "Hello, world!" } i;-M8Q^
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BASIC 1m#.f=u{R
传统版BASIC(例如GWBASIC): `j(._`8%a
CS~_>bn
10 PRINT "Hello, world!" Od)y4nr3~
20 END +vaA
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w jD<"p;P
或在提示符输入: ],k~t5+
_DH^ K9,9
?"Hello, world!":END n\3#69VY
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现代版BASIC(例如Quick BASIC): x7U=1y(
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Print "Hello, world!" 3%5a&b
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以下的语句在Quick BASIC中同样有效: &9fQW?Czs
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? "Hello,world!" <|jh3Hlp
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IEMa/[n/
BCPL `Y5LAt:
GET "LIBHDR" #79[Qtkrhm
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LET START () BE L*tfYonq
$( )iQ^HZ
WRITES ("Hello, world!*N") Rd5_{F
$) e-`.Ht
eNK[P=-
mXOI"B9Sq
Befunge YLGE{bS
"!dlrow olleH">v YnRO>`
, LwK]fFtu
^_@ ws+ '*7
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Brainfuck
}o*A>le
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< b4i=%]v8
+++++++++++++++.>.+++.------.--------.>+.>. W.MZN4=
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C 94BH{9b5
#include <stdio.h> "TZY)\{L
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int main(void) LhbdvJAk@
{
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printf("Hello, world!\n"); uBx\xeI
return 0; b>OB}Is
} N68$b#9Ry
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QQ .?A(U7
C++ 4d5c]%
#include <iostream> fq6Obh=A#
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int main() j'z#V_S
{ EGUlLqP6e
std::cout << "Hello, world!" << std::endl; BZ?3=S1*
return 0; ,bl }@0A
} ]EX6Y
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C++/CLI +9b{Y^^~T
int main() `xLsD}32
{ 9f( X7kt
System::Console::WriteLine("Hello, world!"); TjTG+uQ
} m7'<k1#"Y
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C# (C Sharp) "kyCY9)%
class HelloWorldApp O D}RnKL
{ iH }-
public static void Main() hTX[W%K
{ OB(oOPH
System.Console.WriteLine("Hello, world!"); -<s Gu9
} _Hv+2E[4Z
} H~+A6g]T
1 P!)4W
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COBOL
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IDENTIFICATION DIVISION. +)sX8zb*gY
PROGRAM-ID. HELLO-WORLD. \sAaVdZJH(
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ENVIRONMENT DIVISION. $ZBYOA
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DATA DIVISION. &W@2n&U.q
."$t&[;s
PROCEDURE DIVISION. ZZT #V%Q=u
DISPLAY "Hello, world!". =b%}x >>
STOP RUN. Lb/GL\J)
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rL{R=0
Common Lisp 1|MRXK
(format t "Hello world!~%") 5daq}hsQs
8z#Qp(he
q Q\j
DOS批处理 =u<:'\_
@echo off ;,&cWz
echo "Hello, world!" L^sjV/\oW
FH~:&;
CxFd/X,
Eiffel N[e,){v
class HELLO_WORLD UT<e/
u:l-qD9=(
creation yix[zfQt0
make QKG3>lU
feature 6X \g7bg
make is &W2*'$j"_
local sK}AS;:
io:BASIC_IO W7S~~
do T}#iXgyx
!!io |[*Bn3E:
io.put_string("%N Hello, world!") |6E_N5~
end -- make ORExI.<`W
end -- class HELLO_WORLD uZ+bo&
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Erlang p#@ #$u-
-module(hello). jf9+H!?^N
-export([hello_world/0]). V(7,N(
:"%/u9<A
hello_world() -> io:fwrite("Hello, World!\n"). w*qj0:i5as
L+am-k:T~
@-$8)?`q
Forth U$OZkHA[
." Hello, world!" CR $^]K611w9
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<tr]bCu}
Fortran 7r:h_r-
WRITE(*,10) '75T2Ud
10 FORMAT('Hello, World!') ./YR8 #,
STOP ^ ""edCs
END [YDSS/
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4 PK}lc
HTML }3(!kW
<HTML> +jLy>=u
<HEAD> $dL..QH^K
<TITLE> Hello World! </TITLE> :{7+[LcH7
</HEAD> x?h/e;
<BODY> gaF6j!p
<p>Hello World!</p> ]E`<8hRB
</BODY> &2tfj(ms
</HTML> P'W} ]mCD
wI%M3XaBws
`Q@7,z=f
HQ9+ l1 +l@r\
H RTOA'|[0M
cn'>dz3v
+,Eam6g{
INTERCAL DHO]RRGV
PLEASE DO ,1 <- #13 feej'l }F
DO ,1 SUB #1 <- #238 ,B <\a
DO ,1 SUB #2 <- #112 ].d2C J'
DO ,1 SUB #3 <- #112 \v2!5z8|
DO ,1 SUB #4 <- #0 E7 Cobpm
DO ,1 SUB #5 <- #64 ?
wS}'
DO ,1 SUB #6 <- #238 1.3#PdMR,
DO ,1 SUB #7 <- #26 -Jd|H*wWo
DO ,1 SUB #8 <- #248 d ^bSV4
DO ,1 SUB #9 <- #168 f|d~=\0y
DO ,1 SUB #10 <- #24 Z\!,f.>g
DO ,1 SUB #11 <- #16 aKI"<%PNn
DO ,1 SUB #12 <- #158 S=@+qcI
DO ,1 SUB #13 <- #52 o@meogkL
PLEASE READ OUT ,1 1By tu >2
PLEASE GIVE UP (v]%kXy/G
[|]J8o@u^
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Java !>`Q]M`
public class Hello L}Z.FqJ
{ cO?*(e1m=
public static void main(String[] args) %>|FJ
{ `4"8@>D
System.out.println("Hello, world!"); AWO)]rM
} )%(ZFn}
} 8v$q+Wic
MO`Y&<g~A
"j>X^vn
JSP T;w:^XW
<% #:)'D?,
out.print("Hello, world!"); @*;x1A-]V
%> ]*0zir/
Liqo)m
>* -IIo
MIXAL g"-j/ c
TERM EQU 19 the MIX console device number DUOoTlp
ORIG 1000 start address pbMANZU[
START OUT MSG(TERM) output data at address MSG UHl3/m7g
HLT halt execution
}x'*3zI
MSG ALF "MIXAL" XC<fNK
ALF " HELL" l+ }=D@l
ALF "O WOR" [$y(>]~.
ALF "LD " K?.~}82c
END START end of the program \u[x<-\/6
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0=ws )@[I
Nuva FXCBX:LnvU
<..直接输出..> HE}0_x.
Hello, world! |Ajd$+3
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<..或者..> } z'Jsy[s
g]~vZj
<. j0l,1=^>l
// 不带换行 ;,{_=n>
? "Hello, world!" S_lGrk\j
OUv )`K
// 或者 yR$_ZXsd
] \yIHdcDi
// 带换行 Wa;N(zw0h
?? 'Hello, world!' h,LSqjf"
.> x^s,<G
E ,i^rA m
rto?*^N?
OCaml tU4#7b:Y
let main () = {;$oC4
print_endline "Hello world!";; ?P9aXwc
[@i:qB>B
*HrEh;3^J
Pascal v
:pT(0N
program Hello; b(K"CL\p
begin .@ H:P
writeln('Hello, world!'); &h:4TaD
end. f_k'@e {
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Perl ^O}a,
#!/usr/local/bin/perl 7?dWAUF
print "Hello, world!\n"; *Y> w0k
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PHP <H-Nft>O
<?php X,Ql6uO
print("Hello, world!"); 7Kw'Y8
?> l b(
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dGZie.Zx
Pike (T1< (YZ
#!/usr/local/bin/pike a_N7X
int main() dIC\U
{ ;Gr
{
write("Hello, world!\n"); 6A"$9sj6
return 0; N[Z`tk?-
} 5]O{tSj
V.Hv6
D07M!U
PL/I 3Gs\Q{O:
Test: procedure options(main); $>)0t@[f
declare My_String char(20) varying initialize('Hello, world!'); %a/3*vz/I%
put skip list(My_String); ZthT('"a
end Test; joY7Vk!<