“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。 5x'
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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》。 uJL[m(G
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以下是用不同语言写成的Hello World程序的几个例子: }&IOBYHVDo
Ada (hIy31Pf
with Ada.Text_Io; use Ada.Text_Io; jftf]n&Z(q
procedure Hello is u/X1v-2
begin 1Ozy;;\-9
Put_Line ("Hello, world!"); CYN|
end Hello; l\~F0Z/O
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汇编语言 O `a4
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x86 CPU,DOS,TASM TllIs&MCe
MODEL SMALL !"N-To-c
IDEAL UWq[K&vQZ
STACK 100H T&kr IZw
hdx"/.s
DATASEG VeWvSIP,EQ
HW DB 'Hello, world!$' PkxhR;4
r
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CODESEG x<[W9Z'~?9
MOV AX, @data 0]`%iG|
MOV DS, AX Y`
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MOV DX, OFFSET HW x8E!Ko](
MOV AH, 09H BFMINq>
INT 21H _9b;8%?Yf
MOV AX, 4C00H OqA#4h4^
INT 21H OG}m+K&<
END aak[U;rx
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x86 CPU,GNU/Linux,NASM |fg{Fpc
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). \>r<z46x
;Enter this into "hello.asm" then type: %v 1NDhaXz
;"nasm -f elf hello.asm" 53X5&Bwh
;"ld hello.o -o hello" ^jZ4tH3K
;"./hello" SpiI9)gp
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section .data ;data section declaration m8<l2O=m
msg db 'Hello World!',0AH /l$>W<}@
len equ $-msg ;string length K
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section .text ;code section declaration tu0agSpU
global _start ;entry point (start of execution) e-e*%
_start: mov edx,len ;string length k\wI^D
mov ecx,msg ;string start @EzO
bE{
mov ebx,1 ;file handle: stdout 2/V9Or52
mov eax,4 ;sys_write O#S27.
int 80h ;kernel system call gN/6%,H}
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mov ebx,0 ;return value .@(9v.:_u
mov eax,1 ;sys_exit fI1,L"
int 80h ;kernel system call !_My]>S
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x86 CPU,Windows,MASM32 7! "OF
.386 q\a'pp9d
.model flat,stdcall 6l-V%3-
option casemap:none *T{P^q.s~[
;Include 文件定义 .YcI .
include windows.inc x*2' I
include user32.inc !/Wp0E'A
includelib user32.lib 6Cd% @Q2cr
include kernel32.inc %>Y86>mVz
includelib kernel32.lib ]S#m
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;数据段 beCTOmC
.data ~]&,v|g&
szCaption db 'A MessageBox!',0 l
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szText db 'Hello,world!',0 V[T`I a\
;代码段 Auz.wes
.code p?,:
start: r^|AiYI)
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK ?go+oS^
invoke ExitProcess,NULL WN%KATA
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> }+Ne)B E
end start jLu`DKB
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AWK Ot#O];3
BEGIN { print "Hello, world!" } `$odxo+
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BASIC w0iv\yIRQ
传统版BASIC(例如GWBASIC): HKZD*E((
7$&3(#!N
10 PRINT "Hello, world!" N?mTAF'M
20 END o<r|YRzQl
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或在提示符输入: W{!GL
43 h0i-%1
?"Hello, world!":END xVn"xk
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现代版BASIC(例如Quick BASIC): U*sQYt<?g
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Print "Hello, world!" ]c'12 g]h
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以下的语句在Quick BASIC中同样有效: w[S!U<9/
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? "Hello,world!" }t^N|I
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BCPL G$B( AWL
GET "LIBHDR" ]%y3*N@AZ
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LET START () BE gI SP .
$( ?4 fXCb]7
WRITES ("Hello, world!*N") NlS/PWc6(
$) ]
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Befunge x!08FL)
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#include <stdio.h> R\B-cU[,
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int main(void) lStYfO:<'v
{ B4 cm_YGE
printf("Hello, world!\n"); "|6#n34
return 0; Wx<fD()
} ^" EsBt
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C++ El}."}l&
#include <iostream> I-QaR
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int main() LXIQpD,M
{ cnUYhxE+s
std::cout << "Hello, world!" << std::endl; 8$H_:*A?
return 0; FM)Es&p&
} YB^[HE\#y
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C++/CLI B|~tW21
int main() {q[l4_
{ `Eijy3>h
System::Console::WriteLine("Hello, world!"); Ez*9*]O*+
} /WlpRf%
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C# (C Sharp) 2&f]v`|M|
class HelloWorldApp GtC bzNY
{ ]5+db0
public static void Main() c3X'Sv
{ yj6o533o
System.Console.WriteLine("Hello, world!"); 0<8pG:BQ
} +$hqwNh@Z@
} 5w\>Whbd
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COBOL 1@j0kTJ~m
IDENTIFICATION DIVISION. "QWF&-kAI
PROGRAM-ID. HELLO-WORLD. =,/08Cs
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ENVIRONMENT DIVISION. ~JJuM
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DATA DIVISION. _k0X)N+li
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PROCEDURE DIVISION. t4a/\{/#9|
DISPLAY "Hello, world!". #+vIq?
STOP RUN. oA^aT:o +
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Common Lisp 6/m|Sg.m
(format t "Hello world!~%") (~R [K,G
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DOS批处理 [Ch)6p
@echo off [7Yfv
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echo "Hello, world!" ;\F3~rl
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Eiffel HAHv^
class HELLO_WORLD Oie0cz:>:
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creation ZeUA e
make 7IrbwAGZ3
feature y#4f^J!V
make is a@ E+/9
local qno8qF*
io:BASIC_IO 1}moT#
do ?R7>xrp5
!!io xQ[~ c1
io.put_string("%N Hello, world!") ZfPWH'P
end -- make ionFPc].
end -- class HELLO_WORLD Sn I-dXNF
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Erlang 8X6F6RK6,1
-module(hello). xz-z"
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-export([hello_world/0]). uQwKnD?F+e
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hello_world() -> io:fwrite("Hello, World!\n"). MZyzc{c,
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Forth Qi
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." Hello, world!" CR ^x Wu7q
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Fortran Uxla,CCp-
WRITE(*,10) ~
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10 FORMAT('Hello, World!') 82S?@%}#J
STOP ]SqLF!S(=
END ,]1oG=`3v
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HTML 0y>]68D
<HTML> K,uTO7Mk[
<HEAD> mVJW"*}8
<TITLE> Hello World! </TITLE>
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</HEAD> IFrq\H0
<BODY> f`zH#{u
<p>Hello World!</p>
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</BODY> MIblx
</HTML> ,/d
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