“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。 "
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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》。 @-.? B
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以下是用不同语言写成的Hello World程序的几个例子: qZ2&Xw.{1
Ada ScnY3&rc
with Ada.Text_Io; use Ada.Text_Io; toa-Wa{
procedure Hello is 8uG0^h}
begin _3Q8n|
Put_Line ("Hello, world!"); Mjpo1dw
end Hello; @b!"joEy
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汇编语言 exR^/|BR
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x86 CPU,DOS,TASM t7#lsd`_
MODEL SMALL .I?@o8'x
IDEAL c $;\i
STACK 100H upn8n vy4(
8?TKN~ja
DATASEG U/MFhD(06
HW DB 'Hello, world!$' ateUpGM QU
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CODESEG ph30'"[Z}
MOV AX, @data Qb^q+C)o]
MOV DS, AX wN]J8Ir
MOV DX, OFFSET HW ;M
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MOV AH, 09H K6\` __mLf
INT 21H 34C``i
MOV AX, 4C00H u7]<=*V]
INT 21H _45cH{$sA
END O@U?IF$
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x86 CPU,GNU/Linux,NASM mE$dO3
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). }#9(Mul
;Enter this into "hello.asm" then type: Unl?fXI
;"nasm -f elf hello.asm" ='Oj4T
;"ld hello.o -o hello" pV`$7^#X
;"./hello" ~2%3FV^
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section .data ;data section declaration Vk<k +=7
msg db 'Hello World!',0AH \&|CM8A
len equ $-msg ;string length ?_4^le[;
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section .text ;code section declaration M$#sc`4*
global _start ;entry point (start of execution) =DgCC|p
_start: mov edx,len ;string length &W_th\%
mov ecx,msg ;string start 4be> `d5j
mov ebx,1 ;file handle: stdout 4!%]fg}Um
mov eax,4 ;sys_write NXoK@Y
int 80h ;kernel system call 744=3v
=:$) Z
mov ebx,0 ;return value z4Oo@3$\R
mov eax,1 ;sys_exit IlZu~B9c
int 80h ;kernel system call IvU{Xm"qB
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UOI^c
x86 CPU,Windows,MASM32 [STje8+V
.386 L=A\ J^%
.model flat,stdcall =3+L#P=i9
option casemap:none l:e9y $_)
;Include 文件定义 \XH@b6{
include windows.inc VyZV(k
include user32.inc +t\^(SJ6
includelib user32.lib sWxK~Yg
include kernel32.inc mY2:m(9"5
includelib kernel32.lib b :\D\X
;数据段 P.4E{.)(
.data Zw=G@4xoU
szCaption db 'A MessageBox!',0 mx tgb$*
szText db 'Hello,world!',0 iz
x[
;代码段 J%P)%yX
.code S=9E@(]
start: b~wKF0vq
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK 'C]jwxy
invoke ExitProcess,NULL ?MZ:_'2p
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> "\T"VS^pd
end start `7B14:\A
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BEGIN { print "Hello, world!" } [\HQPo'S
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BASIC ./iXyta
传统版BASIC(例如GWBASIC): 9eSRCLhgD
/RF%1!M
K
10 PRINT "Hello, world!" 1M+Zkak7p
20 END NhlJ3/J j
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或在提示符输入: Sr7@ buF
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?"Hello, world!":END 02M7gBS
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现代版BASIC(例如Quick BASIC): gHH&IzHF
TNsg pJ?\
Print "Hello, world!" b+$o4l/x
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以下的语句在Quick BASIC中同样有效: (4ZLpsbJ
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? "Hello,world!" # ITLz!gE
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RK3.-
BCPL fk\5D[j^
GET "LIBHDR" 6aSM*S)
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LET START () BE Q!)z)-hI
$( bw;iz,Z
WRITES ("Hello, world!*N") 1}DerX 6
$) :|($,3*
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;
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Befunge 7j R7
"!dlrow olleH">v rG5i-'
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Brainfuck P=pY8X:
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< 'Z$jBL
+++++++++++++++.>.+++.------.--------.>+.>. Zih5/I
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u;(K34!)
C |$ w0+bV*
#include <stdio.h> 0$?qoS
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int main(void) <[FS%2,0mb
{ {6Y xN&
printf("Hello, world!\n"); hgif]?:C<
return 0; af^@
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} YiBOi?h9
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C++ W9+h0A-
#include <iostream> y8D 8Y8B
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int main() F]Pul|.l
{ h+
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std::cout << "Hello, world!" << std::endl; K9}jR@jy$
return 0; 6i^0T
} ~Cu lFxu
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C++/CLI jiOf')d5
int main() u4C1W|x
{ <JJkki
System::Console::WriteLine("Hello, world!"); h
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} z.{HD9TD
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C# (C Sharp) zo87^y5?G
class HelloWorldApp 'H
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{ Hc"N&
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public static void Main() JH-nvv
{ krwf8!bI
System.Console.WriteLine("Hello, world!"); ?Ip$;s
} 0rGj|@+;
} yCZ2^P!a
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l`oT:
COBOL QM7[ O]@
IDENTIFICATION DIVISION. A>[hC{
PROGRAM-ID. HELLO-WORLD. @t "~
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ENVIRONMENT DIVISION. s%hU*^ 8
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DATA DIVISION. =CGD
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5:F
PROCEDURE DIVISION. !;ZBL;qY9
DISPLAY "Hello, world!". zmdWVFVv
STOP RUN. 7d%A1}Bq$
~ }Kp
0LZ=`tI
Common Lisp $)4GCP
(format t "Hello world!~%") +q$xw}+PK
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B?!9W@
DOS批处理 .$n$%|"H-
@echo off w
5!ndu
echo "Hello, world!" KC#kss
4|I7:~
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Eiffel ;,()wH
class HELLO_WORLD 5XhK#X%:A
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creation ll 6]W~[ZC
make EaJDz`T}
feature ~r{\WZ.
make is J~M H_N
local G* 8+h
io:BASIC_IO cA2^5'$$
do s0_-1VU
!!io ab8oMi`z
io.put_string("%N Hello, world!") m*Q[lr=
end -- make Q@ykQ
end -- class HELLO_WORLD L?AM&w-cg9
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Erlang ^ uKnP>*l
-module(hello). Fc34Y0_A
-export([hello_world/0]). ppPG+[ cz
^=aml
hello_world() -> io:fwrite("Hello, World!\n"). bS_y_9K
uEc0/a :.
cfrvy^>,
Forth ~| 4U@
." Hello, world!" CR p} t{8j>
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Fortran )< &B