“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。 )_|;h2I
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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》。 efK|)_i
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以下是用不同语言写成的Hello World程序的几个例子: %9}5~VM"q
Ada /4]<ro67E6
with Ada.Text_Io; use Ada.Text_Io; nkv+O$LXP
procedure Hello is e~NEyS~3
begin /!V)2j,
Put_Line ("Hello, world!"); x9,X0JO
end Hello; x8#bd{
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汇编语言 0#gu7n|J
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x86 CPU,DOS,TASM wRa$b
MODEL SMALL YH0=YmU#X
IDEAL ot"3 3I
STACK 100H E3):8>R;1
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DATASEG W'>"E/Tx#O
HW DB 'Hello, world!$' LSR{N|h+)
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CODESEG Fp_?1y
MOV AX, @data sS 5aJ}Qs
MOV DS, AX Ik4FVL8~
MOV DX, OFFSET HW hzT,0<nw
MOV AH, 09H 1Q&\y)@bT
INT 21H ?k5m1,fHW
MOV AX, 4C00H D8`dEB2|S
INT 21H r+4<Lon~
END 3kTOWIX
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x86 CPU,GNU/Linux,NASM QoGvjf3z
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). oi@hZniP?
;Enter this into "hello.asm" then type: !9 B`
;"nasm -f elf hello.asm" O}Ipg[h
;"ld hello.o -o hello" $jpAnZR- /
;"./hello" 7S
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section .data ;data section declaration D 7D:?VoR
msg db 'Hello World!',0AH |f:1Br
len equ $-msg ;string length 4x`.nql
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section .text ;code section declaration "sM
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global _start ;entry point (start of execution) R-L*N$@!
_start: mov edx,len ;string length CJ@G8>
mov ecx,msg ;string start Rxg^vM*
mov ebx,1 ;file handle: stdout l*v6U'J
mov eax,4 ;sys_write TA2?Ia;@xV
int 80h ;kernel system call t_VF=B^LuR
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mov ebx,0 ;return value 7$z]oVbO'
mov eax,1 ;sys_exit =54"9*
int 80h ;kernel system call $.7Ov|
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x86 CPU,Windows,MASM32 0u3"$o'R
.386 0q@U>#
.model flat,stdcall Z=L~W,0'
option casemap:none ]TE,N$X
;Include 文件定义 QB/H
include windows.inc u?ALZxj?
include user32.inc q ,C)AZ
includelib user32.lib W)RCo}f
include kernel32.inc #>]o' KQx
includelib kernel32.lib #QWG5
;数据段 <~rf;2LZ
.data /2<1/[#
szCaption db 'A MessageBox!',0 y; .U-}e1
szText db 'Hello,world!',0 ,KfBG<3
;代码段 dbmty|d
.code Y&G]M
start: w9Eb\An
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK 8hKyp5(%l
invoke ExitProcess,NULL 9XH}/FcP_O
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 82EH'C
end start l]bCt b%_
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AWK 8[z<gxP`?
BEGIN { print "Hello, world!" } K}r@O"6*\
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BASIC ;RmL'
传统版BASIC(例如GWBASIC): rA"><pH
PB
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10 PRINT "Hello, world!" B9Ha6kj
20 END v0d<P2ix
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或在提示符输入: B!;qz[]I
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?"Hello, world!":END FL,av>mV
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现代版BASIC(例如Quick BASIC): uB`H9
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Print "Hello, world!" :k-(%E](
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以下的语句在Quick BASIC中同样有效: cNd;qO0$
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? "Hello,world!" IK
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BCPL EYsf<8cl
GET "LIBHDR" jn+M L&
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LET START () BE 3
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WRITES ("Hello, world!*N") 6G6B!x
$) m9&MTRD\
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Befunge G;'=#c
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C .;:jGe(
#include <stdio.h> OE"r=is
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int main(void) X-Q;4M-CJ
{ /.[;u1z"^
printf("Hello, world!\n"); 1>$}N?u:T
return 0; `4&a"`&$
} 9uRs@]i
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C++ _i-(`5
#include <iostream> IIrXI8'}
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int main() n*HRGJ
{ .QaHE`e{
std::cout << "Hello, world!" << std::endl; ?9?eA^X%
return 0; 6?CBa]QG
} YXBU9T{r
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C++/CLI tR;? o,T
int main() +(*;F4>
{ itp$c|{
System::Console::WriteLine("Hello, world!"); 6z (eW]p
} XQH
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C# (C Sharp) N?7vcN+-t)
class HelloWorldApp gA&+<SK(
{ xD(RjL+
public static void Main() Qxvj`Ge
{ UB4 M=R|
System.Console.WriteLine("Hello, world!"); RgPY,\_9+
} Vd' KN2Jm
} #]BpTpRAe<
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COBOL K?4/x4p@
IDENTIFICATION DIVISION. xz#.3|_('
PROGRAM-ID. HELLO-WORLD. EK-Qa<[|
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ENVIRONMENT DIVISION. @`</Z)
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DATA DIVISION. #kuk3}&
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PROCEDURE DIVISION. )bM #s">Y
DISPLAY "Hello, world!". @rTAbEk{U
STOP RUN. @\!9dK-W
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Common Lisp Ww
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(format t "Hello world!~%") e^Ds|}{V
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DOS批处理 xyoh
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@echo off Gob;dku
echo "Hello, world!" ~4{E0om@
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Eiffel OZw<YR
class HELLO_WORLD 7\q_^
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creation ""dX4^gtU
make ~+y0UEtq7
feature /!r#=enG7
make is )LA^j|Y}
local h%hE$2
io:BASIC_IO I& `>6=)
do 'k9?n)<DW
!!io ~vCfMV[F
io.put_string("%N Hello, world!") S[TJ{L(
end -- make `f@VX
:aL}
end -- class HELLO_WORLD l*+"0
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Erlang `%2e?"OOJ
-module(hello). rQncW~
-export([hello_world/0]). S+i .@N.^
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hello_world() -> io:fwrite("Hello, World!\n"). yrDWIU(8;6
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Forth No\H
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." Hello, world!" CR [ imC21U
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Fortran A~vZ}?*M
WRITE(*,10) LE15y>
10 FORMAT('Hello, World!') xLE+"6;W
STOP U`j[Ni}"
END cU y,q]PO
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HTML a.|4`*1[;
<HTML> JlR'w]d M,
<HEAD> $RQ7rL3g{
<TITLE> Hello World! </TITLE> &h7q=-XU
</HEAD> ,_66U;T
<BODY> mGQgy[gX
<p>Hello World!</p> N.J;/!%!
</BODY> 3^LSK7.:
</HTML> I5"ew=x#
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PLEASE DO ,1 <- #13 &FWPb#
DO ,1 SUB #1 <- #238 _v=@MOI/J
DO ,1 SUB #2 <- #112 ]Q\Ogfjp
DO ,1 SUB #3 <- #112 D_6GzgZ
DO ,1 SUB #4 <- #0 :x*8*@kC
DO ,1 SUB #5 <- #64 ~P*t_cpZ
DO ,1 SUB #6 <- #238 lN,8(n?g
DO ,1 SUB #7 <- #26 E"Z9 NDgl#
DO ,1 SUB #8 <- #248 wHW";3w2~
DO ,1 SUB #9 <- #168 Lw=.LN
DO ,1 SUB #10 <- #24 r9Ux=W\
DO ,1 SUB #11 <- #16 _tfZg /+)
DO ,1 SUB #12 <- #158 Fj9/@pe1
DO ,1 SUB #13 <- #52 @<]xbWhuw
PLEASE READ OUT ,1 XpzdvR1
PLEASE GIVE UP r)|X?
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