“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。 E2@65b$
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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》。 )ufg9"\
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以下是用不同语言写成的Hello World程序的几个例子: !GLz)#SBl
Ada ,)Ju [
with Ada.Text_Io; use Ada.Text_Io; 9N<<{rQ,F
procedure Hello is 6) -X
begin 57zSu3v4Y
Put_Line ("Hello, world!"); [los dnH^?
end Hello; -o[x2u~n\
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汇编语言 ?NR A:t(}
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x86 CPU,DOS,TASM iH@yCNE"
MODEL SMALL VsgE!/>1
IDEAL qY<'<T4\
STACK 100H 6c"0})p
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DATASEG =Z+nz^'b
HW DB 'Hello, world!$' RIXMJ7e7
RHq/JD-
CODESEG Z!@~>i
MOV AX, @data *-q"3D`
MOV DS, AX Nq` C.&
MOV DX, OFFSET HW P 8>d6;o($
MOV AH, 09H xA1hfe.9
INT 21H WZ7BoDa7O
MOV AX, 4C00H h\.zdpR
INT 21H O-cbX/d
END AW_(T\P:u
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x86 CPU,GNU/Linux,NASM #qI= Z0Y
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). {u\Mj
;Enter this into "hello.asm" then type: e7(ucE
;"nasm -f elf hello.asm" TUDr\' @/f
;"ld hello.o -o hello" ? glSC$b
;"./hello" IOoz^/'
j!4et;
section .data ;data section declaration a1.Ptf eW|
msg db 'Hello World!',0AH _$f9]bab
len equ $-msg ;string length ]*FVz$>XM
vj\d A2!~
section .text ;code section declaration U{z9>
global _start ;entry point (start of execution) *@Y3oh}S
_start: mov edx,len ;string length 6s\Kt3=
mov ecx,msg ;string start .k9{Yv0
mov ebx,1 ;file handle: stdout 7J|VD#DE$Y
mov eax,4 ;sys_write 0-|byAh
int 80h ;kernel system call \B 0ywN?
;3: q?&
mov ebx,0 ;return value !{)tSipd
mov eax,1 ;sys_exit xw
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int 80h ;kernel system call M57T2]8,
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x86 CPU,Windows,MASM32 g'=B%eO$j:
.386 .I'o
.model flat,stdcall c`WHNky%j
option casemap:none R~jHr
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;Include 文件定义 IS[thbzkZ
include windows.inc ./D$dbu3
include user32.inc IlE_@gS8
includelib user32.lib UkHY[M7;
include kernel32.inc rEv*)W
includelib kernel32.lib t|<NI+H(e
;数据段 ~J8pnTY
.data i|}[A
szCaption db 'A MessageBox!',0 psC
mbN
szText db 'Hello,world!',0 !]fQ+ *X0g
;代码段 q7Dw_<
.code o{EC&-
start: iMFgmM|
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK E%v?t1>/
invoke ExitProcess,NULL E}_[QEY;Y
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 6,LubZFD
end start
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BEGIN { print "Hello, world!" } A"l?:?rtw]
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BASIC +1!qs,
传统版BASIC(例如GWBASIC): kbfC|5S
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10 PRINT "Hello, world!" Ra/Ukv_ v
20 END RJH,
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或在提示符输入: bY2 C]r(n
xD /9F18
?"Hello, world!":END ?N=m<fn
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现代版BASIC(例如Quick BASIC): <~X >[PK<
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Print "Hello, world!" @]c(V%x
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以下的语句在Quick BASIC中同样有效: 8kOKwEX
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? "Hello,world!" 7,MS '2nz
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BCPL h:)Ci!D;
GET "LIBHDR" 7`H
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LET START () BE |*X*n*oI
$( je4 w=]JV
WRITES ("Hello, world!*N") eo!zW
$) ;HBCUe<_
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Befunge Enq|Y$qm
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+++++++++++++++.>.+++.------.--------.>+.>. xwZ8D<e-,
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C %=<IGce
#include <stdio.h> vhT_=:x
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int main(void) 5ZPzPUa8~
{ desThnTw
printf("Hello, world!\n"); 0l#)fJo
return 0; m&oi8 P-6
} =}fd6ea(o
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C++ ;#)mLsl
#include <iostream> W~B5>;y
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int main() -(JUd4#
{ X0+fsf<H}
std::cout << "Hello, world!" << std::endl; iG,t_??
return 0; $O:w(U
} 6ZqgY1
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C++/CLI Y/8K;U|
int main() [$(R#tZ+
{ cQZ652F9
System::Console::WriteLine("Hello, world!"); |\uYv|sT
} bv
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C# (C Sharp) >1irSUj"~
class HelloWorldApp A~{f/%8D
{ AzpV4(:an.
public static void Main() $ 'QdFkOr
{ d2ENm%q*PX
System.Console.WriteLine("Hello, world!"); [{<dbW\ 9
} 6a>H|"PNE
} W*xX{$NL
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COBOL P8gXCX!>U
IDENTIFICATION DIVISION. gKb0)4 AK
PROGRAM-ID. HELLO-WORLD. 88a<{5
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ENVIRONMENT DIVISION. Hwe)Tsh e
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DATA DIVISION. 3@O0^v-
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PROCEDURE DIVISION. JK~ m(oQ
DISPLAY "Hello, world!". P-JfV 7(O8
STOP RUN. +ydm,aKk
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Common Lisp ZAg;q#z j
(format t "Hello world!~%") 3On
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DOS批处理 WY)^1Gb$ux
@echo off s"0b%0?A
echo "Hello, world!" o;-<|W>
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Eiffel Wc#:f8dr
class HELLO_WORLD Ha ZFxh-(
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creation %f[Ep 3D
make D?+
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feature >4![&