“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。 k[\a)WcY8
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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》。 !9;)N,
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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<,/gj
Ada X\Y}oa."A
with Ada.Text_Io; use Ada.Text_Io; F8<"AI
procedure Hello is G2`${aMS
begin _qn?2u3mnR
Put_Line ("Hello, world!"); \M{[f=6llh
end Hello; @w\I qr
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汇编语言 2Il8f
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x86 CPU,DOS,TASM h[kU<mU"T
MODEL SMALL
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IDEAL b9~A-Z
STACK 100H 3`*Kav>"
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DATASEG gl{B=NN
HW DB 'Hello, world!$' a 7#J2 r
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CODESEG wN97_Y=`n
MOV AX, @data fRB5U'
MOV DS, AX +m)q% I>
MOV DX, OFFSET HW ]kD"&&HV
MOV AH, 09H jVO{$j
INT 21H $A2n{
MOV AX, 4C00H &<3&'*ueW
INT 21H _ \D"E>oM
END Y-)xTn
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x86 CPU,GNU/Linux,NASM .5w azvA
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). LlHa5]E@6
;Enter this into "hello.asm" then type: edipA
P~!
;"nasm -f elf hello.asm" o.m:3!RW
;"ld hello.o -o hello" &xXEnV
;"./hello" e(?]SU|
}^xE|~p
section .data ;data section declaration X(@uw X$m
msg db 'Hello World!',0AH dtZE67KS
len equ $-msg ;string length 4;<ut$G
Dnw| %6Y
section .text ;code section declaration Vi*e@IP/
global _start ;entry point (start of execution) 8R/dA<Ww
_start: mov edx,len ;string length NI aFI(
mov ecx,msg ;string start ;=4Xz\2
mov ebx,1 ;file handle: stdout *bd[S0l
mov eax,4 ;sys_write 6*45Vf
int 80h ;kernel system call = &tmP
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mov ebx,0 ;return value )Ry<a$Q3
mov eax,1 ;sys_exit M f~}/h
int 80h ;kernel system call ) ;FS7R
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x86 CPU,Windows,MASM32 j8Cho5C
.386 ICC%,$C~l
.model flat,stdcall hI},~af
option casemap:none s58C2
;Include 文件定义 :e<7d8E5n{
include windows.inc q?):oJ
include user32.inc KC`q#&dt
includelib user32.lib */^QH@ P
include kernel32.inc 'Gl&Pa1g?
includelib kernel32.lib kD5!}+y
;数据段 }}|)Yq
.data ^uBxgWIC
szCaption db 'A MessageBox!',0 A\fb<
szText db 'Hello,world!',0 v{aq`uH
;代码段 :Dt~e|
.code q%Yn;g|_
start: up>c$jJ
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK 3^?ZG^V
invoke ExitProcess,NULL 30>3 !Xqa
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> *`_{
end start r [ :
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BEGIN { print "Hello, world!" } -I.d}[
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BASIC !|ak^GE:(%
传统版BASIC(例如GWBASIC): sEMQ
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10 PRINT "Hello, world!" |`Or'%|PR
20 END J(DN!
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或在提示符输入: LbEM^D
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?"Hello, world!":END ':{>a28=
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现代版BASIC(例如Quick BASIC): &i+Ce
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Print "Hello, world!" WOzf]3Xcj
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以下的语句在Quick BASIC中同样有效: i4Lc$20?d
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? "Hello,world!" [e[<p\]
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BCPL LUB${0BrA
GET "LIBHDR" G uz"wY
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LET START () BE 7frTTSZ
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WRITES ("Hello, world!*N") L:XC
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Befunge svxw^0~a
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Brainfuck ]vwW]O7
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< Pj}66.
+++++++++++++++.>.+++.------.--------.>+.>. VD_$$Gn*q
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C `tP7ncky
#include <stdio.h> _S>JKz
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int main(void) lpz2 m\
{ ns6(cJ^a
printf("Hello, world!\n"); xJ#d1[kzo
return 0; J8mdoVt
} SkmT`*v@
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C++ 0$,SF3K
#include <iostream> ZK>WW
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int main() 0PlO(",a
{ B95B|tU>.
std::cout << "Hello, world!" << std::endl; /!c${W!sY
return 0; ,^uEYT}j
} RzWXKBI\E]
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C++/CLI Lhqz\ o
int main() )wT-8o
{ rqY`8Ry2M
System::Console::WriteLine("Hello, world!"); z11O F
} :Nz9xD$S5
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C# (C Sharp) B)0i:"q
class HelloWorldApp euC&0Ee2
{ Hv2De0W
public static void Main() uD^cxD
{ |UX(+;n
System.Console.WriteLine("Hello, world!"); ]*AR,0N&
} <yd{tD$A*
} 3\XU_Xs(]
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COBOL 8P|D13- Q
IDENTIFICATION DIVISION. DAXX;4
PROGRAM-ID. HELLO-WORLD. u:=7l
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ENVIRONMENT DIVISION. VIv&ofyAR
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DATA DIVISION. 9b9$GyI
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PROCEDURE DIVISION. zzX_q(:S
DISPLAY "Hello, world!". b45-:mi!
STOP RUN. ~{jcH
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Common Lisp ]"?)Z
(format t "Hello world!~%") sVOyT*GY
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DOS批处理
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@echo off $42{HFGq
echo "Hello, world!" ;IZwTXu !S
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Eiffel TA4!$7b$
class HELLO_WORLD E>D_V@,/
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creation 0"f\@8r(
make y~U #veY
feature pe1R(|H
make is
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local 1pgU}sRk
io:BASIC_IO QC}CRkp
do E?
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!!io uFinv2Z'
io.put_string("%N Hello, world!") |R/%D%_g
end -- make `u&Rsz&^
end -- class HELLO_WORLD xD~5UER
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Erlang H _zo1AW
-module(hello). D=-SO
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-export([hello_world/0]). /7Cc#P6
:%,:"
hello_world() -> io:fwrite("Hello, World!\n"). Ezd_`_@R
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Forth j}.\]$J
." Hello, world!" CR `xqr{lhL
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Fortran Ws|j#X<
WRITE(*,10) m8d!<
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10 FORMAT('Hello, World!') Bf ~vA4
STOP hG12ZZ D
END /rnu<Q#iH
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HTML of%Ktm5Qi
<HTML> RAgg:3^
<HEAD> C26>BU<
<TITLE> Hello World! </TITLE> .$+#1-
</HEAD> BBwy,\o#
<BODY>
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<p>Hello World!</p> gd`!tRcNY
</BODY> i:Y^{\Z?V
</HTML> +M\`#i\g>
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INTERCAL }v}P
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PLEASE DO ,1 <- #13 >UiYL}'br6
DO ,1 SUB #1 <- #238 rWa2pO
DO ,1 SUB #2 <- #112 W$hx,VEy`
DO ,1 SUB #3 <- #112 &=] ~0$
DO ,1 SUB #4 <- #0 %)zodf
DO ,1 SUB #5 <- #64 'YmIKIw
DO ,1 SUB #6 <- #238 g?goZPZB
DO ,1 SUB #7 <- #26 cQy2"vtU
DO ,1 SUB #8 <- #248 zPn+V7F
DO ,1 SUB #9 <- #168 "O3tq=Q
DO ,1 SUB #10 <- #24 vWzm@
DO ,1 SUB #11 <- #16 ` Mjj@[
DO ,1 SUB #12 <- #158 S"NqM[W
DO ,1 SUB #13 <- #52 I_}SB|
PLEASE READ OUT ,1 CkOz
PLEASE GIVE UP c|e~BQdRw
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Java bnf'4PAt
public class Hello Cjm`|~&e+
{ IA8f*]?
public static void main(String[] args) &Cr: