“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。 LjH*rjS4
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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》。 @Fpb-Qd"
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以下是用不同语言写成的Hello World程序的几个例子: DS-fjH\
Ada 0K-*WQ*#9
with Ada.Text_Io; use Ada.Text_Io; \@;\t7~
procedure Hello is '/I:^9
begin D r9 ?2
Put_Line ("Hello, world!"); tdF9NFMD
end Hello; A~dQ\M
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汇编语言 $) 5Bf3P0
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x86 CPU,DOS,TASM '>v^6iS
MODEL SMALL iHp\o=#
IDEAL K"V:<a
STACK 100H pfd#N[c
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DATASEG L@^~N$G&u
HW DB 'Hello, world!$' =ORf%f5"'
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CODESEG ZCg`z
MOV AX, @data <q,+ON\'
MOV DS, AX Cj*-[EL<
MOV DX, OFFSET HW dtAbc7
MOV AH, 09H SxjCwX">
INT 21H ./p|?pu
MOV AX, 4C00H do-c1;M
INT 21H CWO=0_>2
END m ga6[E<
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x86 CPU,GNU/Linux,NASM >bUj*#<
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). - /c7nF
;Enter this into "hello.asm" then type: %k0EpJE%
;"nasm -f elf hello.asm" dS`Bk6Y
;"ld hello.o -o hello" X[W]=yJJ
;"./hello" ]=!P(z|
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section .data ;data section declaration V5D`eX9
msg db 'Hello World!',0AH LjdYsai-
len equ $-msg ;string length kHJ96G
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section .text ;code section declaration jFerYv&K~
global _start ;entry point (start of execution) PVao
_start: mov edx,len ;string length F8+e,x
mov ecx,msg ;string start s^T+5E&}
mov ebx,1 ;file handle: stdout somfv$'B
mov eax,4 ;sys_write )uLr?$qe
int 80h ;kernel system call 9B+wYJp
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mov ebx,0 ;return value s~},y]YV
mov eax,1 ;sys_exit oY`qI nM_
int 80h ;kernel system call CT d|`
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x86 CPU,Windows,MASM32 9zgNjjCl]
.386 Z v0C@r
.model flat,stdcall h<+|x7u
option casemap:none cywg[
;Include 文件定义 Q&M'=+T
include windows.inc /9Ilo\MdD
include user32.inc J`#`fX
includelib user32.lib 4B?!THjk
include kernel32.inc #\bP7a+
includelib kernel32.lib XtBMp=7Oa
;数据段 y7<&vIEC
.data Napf"Av
szCaption db 'A MessageBox!',0 2@vj!U 8
szText db 'Hello,world!',0 W>spz~w%j
;代码段 eFTX6XB:i
.code 6(sIYZ2yq
start: v&3O&y/1v
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK }iIbcA
invoke ExitProcess,NULL `eRLc}aP2
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> g$j6n{Yl
end start qvt-
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BEGIN { print "Hello, world!" } 2r];V'r
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BASIC ,2 WH/"
传统版BASIC(例如GWBASIC): m%QqmTH
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10 PRINT "Hello, world!" r9ke,7?
20 END iilyw_$H
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或在提示符输入: yZSvn[f
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?"Hello, world!":END 6T^lS^
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现代版BASIC(例如Quick BASIC): vW' 5` %
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Print "Hello, world!" WfGH|u
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以下的语句在Quick BASIC中同样有效: #Y[H8TW
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? "Hello,world!" =8{*@>CX
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BCPL F>:%Cyo0!
GET "LIBHDR" ~Sy-gaJ
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LET START () BE E!aq?`-'!
$( F(CRq`
WRITES ("Hello, world!*N") q|q::q*
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Befunge _1JmjIH)M
"!dlrow olleH">v PI7IBI
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Brainfuck fkW(Dt,
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+++++++++++++++.>.+++.------.--------.>+.>. MM_py!=>7
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C "d?f:x3v^
#include <stdio.h> 7b.U!Ju
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int main(void) J1-):3A
{ PN\V[#nS
printf("Hello, world!\n"); \:sk9k
return 0; \ j]~>9
} v+tO$QZ`
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C++ P,1exgq9
#include <iostream> o5#,\Y[ g
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int main() ChIoR:y>
{ e<'U8|}hc{
std::cout << "Hello, world!" << std::endl; *?Wtj
return 0; }'jV/
} Kcn\g.
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C++/CLI SY6r 8RK
int main() J%4HNW*p
{ 70<K.T<b
System::Console::WriteLine("Hello, world!"); /s-d?
} luF#OP C
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C# (C Sharp) 5TET<f6R
class HelloWorldApp &V;x 4
{ sUda
public static void Main() xL&PJ /'
{ ^%zNa6BL
System.Console.WriteLine("Hello, world!"); )b (X
} kt<@H11
} #! @m y
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COBOL {Vl"m2
IDENTIFICATION DIVISION. SbJh(V-pr
PROGRAM-ID. HELLO-WORLD. ]1Qi=2'
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ENVIRONMENT DIVISION. ;7
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DATA DIVISION. VLd=" ~
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PROCEDURE DIVISION. Z>HNe9pr
DISPLAY "Hello, world!". lDU#7\5.
STOP RUN. </hR!Sb]
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Common Lisp [5pn@o
(format t "Hello world!~%") 4`G=q^GL,
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DOS批处理 #?5VsD8
@echo off /~"AG l.
echo "Hello, world!" '7=<#Blc
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Eiffel p(7c33SyF
class HELLO_WORLD x[a'(5PwY
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creation M->Kz{h?j
make 6fQ*X~| p
feature PJ6$);9}6
make is OMxxI 6h
local rX)o3>q^?
io:BASIC_IO =~;zVP
do ep`/:iY W
!!io @s?oJpo
io.put_string("%N Hello, world!") {!tOI
end -- make zlN+edgY#,
end -- class HELLO_WORLD
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Erlang .1%i`+uZ
-module(hello). TR_(_Yd?36
-export([hello_world/0]). R3cG<MjmK
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hello_world() -> io:fwrite("Hello, World!\n"). 6vZt43"m?\
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Forth [ y$j9
." Hello, world!" CR MbM:3
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