“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。 ^(m6g &$(
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将Hello World程序作为第一个学写的程序,现在已经成为一种传统。该程序最早出现在由Brian Kernighan和Dennis Ritchie写的计算机程序设计教程《C语言程序设计》。 Q}f}Jf3P
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以下是用不同语言写成的Hello World程序的几个例子: d_7Xlp@
Ada VU0tyj$
with Ada.Text_Io; use Ada.Text_Io; .]ZuG
procedure Hello is :iNAXy
begin r5qx! >
Put_Line ("Hello, world!");
IOSoc 7+"
end Hello; $}nUK~$GSv
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汇编语言 *I1W+W`G
e%v4,8
x86 CPU,DOS,TASM UV8r&O
MODEL SMALL Z2j*%/
IDEAL A"3&EuvU
STACK 100H llG#nDe
ut5!2t$c
DATASEG 6ewOZ,"j"4
HW DB 'Hello, world!$' a&c#* 9t{
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CODESEG 1 l*(8!_
MOV AX, @data q{+poVX
MOV DS, AX P$qkb|D,
MOV DX, OFFSET HW V?J,ab$X#
MOV AH, 09H
nIDsCu=A
INT 21H >/`cmNmb
MOV AX, 4C00H bq&S?! =s
INT 21H GuY5 %wr
END <w2NJ~M^
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x86 CPU,GNU/Linux,NASM XQY&4tK
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). @]"9EW
0
;Enter this into "hello.asm" then type: ]j$p _s>
;"nasm -f elf hello.asm" "PScM9) \
;"ld hello.o -o hello" <^'+]?
;"./hello" jhbH6=f4]^
-GWzMBS S
section .data ;data section declaration dQ|Ht[s=
msg db 'Hello World!',0AH @N_H]6z4
len equ $-msg ;string length yz$1qEII`q
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section .text ;code section declaration tP(bRQ>
global _start ;entry point (start of execution) ee0>B86tE
_start: mov edx,len ;string length 'U{:
zBh
mov ecx,msg ;string start z*~PYAt
mov ebx,1 ;file handle: stdout m"7 R
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mov eax,4 ;sys_write 4kF .
int 80h ;kernel system call Yg,lJ!q
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mov ebx,0 ;return value s]8J+8
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mov eax,1 ;sys_exit nzJi)A./
int 80h ;kernel system call M-K@n$k
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x86 CPU,Windows,MASM32 @#Uiy5N
.386 I_I;.Ik
.model flat,stdcall {ro!OuA
option casemap:none 7`<? fO
;Include 文件定义 X6*y/KGN
include windows.inc la{uJ9Iw@}
include user32.inc Z*aU2Kr`;
includelib user32.lib f#Cdx"
include kernel32.inc |b~g^4
includelib kernel32.lib vfTG*jG
;数据段 la|l9N^,
.data ?[/,*Q%
szCaption db 'A MessageBox!',0 ];~[Olc
szText db 'Hello,world!',0 I5OH=,y`
;代码段 &`Z)5Ww
.code 8PjhvU
start: ZV4'
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invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK 2OlC7X{
invoke ExitProcess,NULL {!Z_&i5
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> K}3"K C
end start t}+c/ C%b=
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AWK HF[%/Tu
BEGIN { print "Hello, world!" } >P"/nS"nn
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BASIC 'wlP` 7&Tn
传统版BASIC(例如GWBASIC): +9rbQ?'
6U9Fa=%>}
10 PRINT "Hello, world!" ayz1i:Q|
20 END -vfu0XI~
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或在提示符输入: o?
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9}$dwl(
?"Hello, world!":END 5d{Ggg{s
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现代版BASIC(例如Quick BASIC): @wJa33QT
#|h8u`
Print "Hello, world!" 8B+^vF
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以下的语句在Quick BASIC中同样有效: J$*["y`+
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? "Hello,world!" ?o5#Ve$-X
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\#7%%>p=O'
BCPL Riuv@i^6K
GET "LIBHDR" TFNU+
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LET START () BE 7$P(1D4
$( M|=$~@9#X
WRITES ("Hello, world!*N") Nh/ArugP5P
$) .T wF]v
vbh#[,lh
TEZqAR]G
Befunge NfN6KDd]2L
"!dlrow olleH">v i j;'4GzQL
, rWKLxK4oU
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sc>)X{eb
Brainfuck I19F\
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++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< 2czL 1Ci
+++++++++++++++.>.+++.------.--------.>+.>. abP?Dj&
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C ]=<@G.[=
#include <stdio.h> vg1s5Yqk
_!1c.[\T
int main(void) pR>QIZq<gT
{ %~XJwy-
printf("Hello, world!\n"); |ema-pRC
return 0; ,
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} ZaindX{.1
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C++ tzJtd
#include <iostream> c2:kZxT
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int main() }kefrT
{ ~2ei+#d!^
std::cout << "Hello, world!" << std::endl; dh`A(B{hfc
return 0; A~SSu.L@
} Mn;CG'FA
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C++/CLI X]%4QIeS
int main() }gaKO 5
{ 8GQs9
System::Console::WriteLine("Hello, world!"); U<byR!qLie
} Ggjb86v\
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C# (C Sharp) OZ9j3Q;a$
class HelloWorldApp !gQ(1u|r
{ 4yy
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public static void Main() vtjG&0GSK
{ cu|q&
System.Console.WriteLine("Hello, world!"); NO1]JpR
} `o'sp9_3
} ;%9ZL[-
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COBOL f2f$aZ
IDENTIFICATION DIVISION. jZyh
PROGRAM-ID. HELLO-WORLD. )A;<'{t #L
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ENVIRONMENT DIVISION. 36UWoo
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DATA DIVISION. ||NCVGJG
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PROCEDURE DIVISION. '11h Iu=:
DISPLAY "Hello, world!". Hb4rpAeP
STOP RUN. +O6@)?pI
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Common Lisp Vdyx74xX
(format t "Hello world!~%") H-lRgJdc
B`Pi\1H6%
B)*%d7=x
DOS批处理 Zwl?*t\D
@echo off Os+=}
echo "Hello, world!" yB[LO(i
AP@d2{"m}
#}?$mxME*
Eiffel |V]E8Qt
class HELLO_WORLD oaE3Aa
]P^ +~
creation 6Wp:W1E{`
make jL>r*=K)%
feature (>23[;.0
make is _bsfM;u.%
local H8U*oLlc
io:BASIC_IO x$sQ .aT
do 6 , ~aV
!!io gUQCKNw
io.put_string("%N Hello, world!") cMAfW3j: ;
end -- make &2^V<(19
end -- class HELLO_WORLD Sj+#yct -
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Erlang beoMLHp
-module(hello). so?1lG
-export([hello_world/0]). `dhK$jYD
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hello_world() -> io:fwrite("Hello, World!\n"). {D8IA3w
CPG %*E*
yKJp37R
Forth _>l,%n
." Hello, world!" CR l71\II
C: cu1Y9
t&]IgF
Fortran ~ME=!;<_
WRITE(*,10) = %m/
10 FORMAT('Hello, World!') T@.CwV
STOP 2"T&Fp<
END FSk:J~Z;
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HTML ~XRr }z_Lq
<HTML> suwj1qYJ4
<HEAD> |@nXlZE
<TITLE> Hello World! </TITLE> z=sqO'~
</HEAD> AF}HS8eYy
<BODY> k:.c(_2M
<p>Hello World!</p>
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</BODY> ~ln,Cm} 4
</HTML> }, H,ky
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