“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。 ^M'(/O1
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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》。 'J,UKK\5
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以下是用不同语言写成的Hello World程序的几个例子: ~#r>@C
Ada Qr.{_M
with Ada.Text_Io; use Ada.Text_Io; (Q*q#U
procedure Hello is Ew/MSl6}
begin ZcN0:xU
Put_Line ("Hello, world!"); FA+HR
end Hello; ,:?ibE=
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汇编语言 7Qd4L.
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x86 CPU,DOS,TASM C4mkt2Eb0a
MODEL SMALL U%h.l
IDEAL !> sA.L&=
STACK 100H U,WOP7z
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=^
DATASEG D!`[fjs6A
HW DB 'Hello, world!$' E`)e
;^
q,P.)\0A
CODESEG O*u
MOV AX, @data LIDi0jbrq
MOV DS, AX
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MOV DX, OFFSET HW ]Jswxw
MOV AH, 09H 0~nX7
INT 21H XJ7B?Zg
MOV AX, 4C00H x1@,k=qrd
INT 21H QbJ7$, 4
END 6()Jx%
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x86 CPU,GNU/Linux,NASM ,a5q62)q
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). L1kn="5
;Enter this into "hello.asm" then type: W? G4>zA
;"nasm -f elf hello.asm" 3o rSk
;"ld hello.o -o hello" Id?-Og2iV
;"./hello" [Q T ;~5
r*{.|>me
section .data ;data section declaration JAxzXAsAR
msg db 'Hello World!',0AH
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len equ $-msg ;string length Ku'a,\7z
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!cYB
section .text ;code section declaration 4zs0+d+
global _start ;entry point (start of execution) q>%B @'
_start: mov edx,len ;string length v}!lx)#
mov ecx,msg ;string start %qV:h#
mov ebx,1 ;file handle: stdout 7^>~k}H
mov eax,4 ;sys_write |21VOPBS
int 80h ;kernel system call ftn10TO *
P*k n}:
mov ebx,0 ;return value 1Ne;U/
mov eax,1 ;sys_exit OsOfo({I_
int 80h ;kernel system call 92j[b_P
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x86 CPU,Windows,MASM32 U9BhtmY
.386 >JNdtP8s/1
.model flat,stdcall J[}j8x?r
option casemap:none h8WM4
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;Include 文件定义 I*3>>VN
include windows.inc *lDVV,T'}w
include user32.inc y:E$n!
includelib user32.lib $$ $[Vn_H<
include kernel32.inc }se3y
includelib kernel32.lib e>_a
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;数据段 eS Z':p
.data n:a~=^IV
szCaption db 'A MessageBox!',0 w.rcYywI
szText db 'Hello,world!',0 Eg&5tAyM
;代码段 `)$G}7cRUH
.code 3Z~_6P^
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start: ~|<'@B!6
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK jcC"vr'u|
invoke ExitProcess,NULL #HP-ne; #
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> SWtqp(h]'
end start V}`ri~
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AWK { Mf-?_%
BEGIN { print "Hello, world!" } $J<WFDn9
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BASIC hKg +A
传统版BASIC(例如GWBASIC): -~RGjx
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10 PRINT "Hello, world!" |7KWa(V5I
20 END W9}
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或在提示符输入: 7m%12=Im5
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?"Hello, world!":END iW2\;}y
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现代版BASIC(例如Quick BASIC): -cJ,rrN_9
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Print "Hello, world!" }Z\S__\9
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以下的语句在Quick BASIC中同样有效: OVxg9
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? "Hello,world!" :
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hwvi tD!0
BCPL \N-3JO Vy
GET "LIBHDR" o\><e1P
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LET START () BE #=0 BjW*
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WRITES ("Hello, world!*N") /kw;q{>?o
$) !/a6;:_y
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Befunge Zl'/Mxg
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#include <stdio.h> ")txFe
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int main(void) zkqn>
{ 3` oOoKX
printf("Hello, world!\n"); ux!YVvTPd
return 0; hosY`"X
} .}Xf<G&
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C++ h<>yzr3fN
#include <iostream> '|yCDBu
dS <*DP
int main() a]%sks
{ ":s_O.
std::cout << "Hello, world!" << std::endl; l1O"hd'~s
return 0; Wi!"Vcn
} .oLV\'HAR
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C++/CLI v[8+fd)}S
int main() zA.0Sm
{ < FO=PM
System::Console::WriteLine("Hello, world!"); 1kvs2
} y5O &9Ckw
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C# (C Sharp) N]|>\
class HelloWorldApp H|wP8uQC
{ +w?R4Sxjn
public static void Main() v*dw'i
{ {i8zM6eC
System.Console.WriteLine("Hello, world!"); <LXx_{=:
} W-&V:S{<
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COBOL NT5'U
IDENTIFICATION DIVISION. B{:a,V7
PROGRAM-ID. HELLO-WORLD. w=rD8@
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ENVIRONMENT DIVISION. DU]KD%kl
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DATA DIVISION. c>^(=52Q
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PROCEDURE DIVISION. vxI9|i
DISPLAY "Hello, world!". ?7LvJ8
STOP RUN. ,J!$Q0 e
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Common Lisp "opMS/a"7
(format t "Hello world!~%") fCJjFL:
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v*=P
DOS批处理 y;8&J{dd
@echo off
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echo "Hello, world!" S**eI<QFSk
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Eiffel [x>Ju&))$
class HELLO_WORLD }AJoF41X
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creation 3Ioe#*5\
make Q-gVg%'7
feature x4H#8ZK!
make is q=BljSX
local ow3.jHsLA
io:BASIC_IO y5m2u8+
do ~qGW94
!!io \% =\4%:
io.put_string("%N Hello, world!") :-k|jt
end -- make `S@TiD*
end -- class HELLO_WORLD M`Er&nQs
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Erlang (hzN(Dh
-module(hello). a[O6xA%
-export([hello_world/0]). )S)L9('IxT
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hello_world() -> io:fwrite("Hello, World!\n"). >0IZ%Wiz
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Forth -1g:3'%
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." Hello, world!" CR $RPW/Lyiq
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Fortran Zh<;r;2
WRITE(*,10) jmM|on!
10 FORMAT('Hello, World!') O<gfZ>
STOP LwH#|8F
END 7^q~a(j
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HTML %iN>4;T8
<HTML> ?['!0PF
<HEAD> fd\RS1[
<TITLE> Hello World! </TITLE> |^pev2g
</HEAD> OU[<\d
<BODY> >gk_klLh
<p>Hello World!</p> S\k <
</BODY> \*xB<mq
</HTML> Ej(Jj\
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INTERCAL 1j<(?MT-
PLEASE DO ,1 <- #13 6o3
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DO ,1 SUB #1 <- #238 j2Zp#E!
DO ,1 SUB #2 <- #112 '|C3t!H`
DO ,1 SUB #3 <- #112 tli.g
DO ,1 SUB #4 <- #0 ~4S$+*'8
DO ,1 SUB #5 <- #64
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DO ,1 SUB #6 <- #238 |?` 5 ~f
DO ,1 SUB #7 <- #26 C_.9qo]DT7
DO ,1 SUB #8 <- #248 woYD &Oml
DO ,1 SUB #9 <- #168 l\HdB"nT
DO ,1 SUB #10 <- #24 pMc6p0
DO ,1 SUB #11 <- #16 WL$^B@gXQ
DO ,1 SUB #12 <- #158 |D3u"Y!:^
DO ,1 SUB #13 <- #52 6K $mW
PLEASE READ OUT ,1 X'9.fKp
PLEASE GIVE UP E_HB[9
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Java g;IlS*Ld
public class Hello "q4tvcK.
{ ,w
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public static void main(String[] args) )^h6'h`
{ ?HZp@&
System.out.println("Hello, world!"); cw;wv+|k
} o<2GtF1"o
} 5/48w-fnZ
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