“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。 Y6N+,FAk+J
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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》。 [2\`Wh:%P
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以下是用不同语言写成的Hello World程序的几个例子: SbI,9<
Ada S?3{G@!
with Ada.Text_Io; use Ada.Text_Io; k6Tpaf^
procedure Hello is S'@"a%EV
begin kT$4X0}
Put_Line ("Hello, world!"); H>7!+&M
end Hello; 4x C0Aw
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汇编语言 ~r>UjC_
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x86 CPU,DOS,TASM i'5bPW
MODEL SMALL pP/o2
IDEAL #ASu
SQ
STACK 100H Xr)d;@yi
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DATASEG T8m%_U#b
HW DB 'Hello, world!$' ZR QPOy
!CMN/=
CODESEG sN?:9J8
MOV AX, @data YJL=|v
MOV DS, AX 11-uJVO~*
MOV DX, OFFSET HW sNZPv^c
MOV AH, 09H pF !vW
INT 21H h=U 4
MOV AX, 4C00H +_}2zc4
INT 21H cXCczqabv
END v*^2[pf
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x86 CPU,GNU/Linux,NASM '#Fh
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;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). `fV$'u
;Enter this into "hello.asm" then type: #62ww-E~
;"nasm -f elf hello.asm" >S3 >b
;"ld hello.o -o hello" <A&R%5Vs
;"./hello" *oWzH_
nm~
section .data ;data section declaration J~Ph)|AiS
msg db 'Hello World!',0AH H5%I?ZXw4
len equ $-msg ;string length Qv=Z
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section .text ;code section declaration :OZhEBL&b
global _start ;entry point (start of execution) U{}7:&As
_start: mov edx,len ;string length Z"^@B2v
mov ecx,msg ;string start yTvK)4&
mov ebx,1 ;file handle: stdout YOoP]0'L
mov eax,4 ;sys_write 1M{#"t{6
int 80h ;kernel system call hWu)0t
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mov ebx,0 ;return value OlJj|?z$
mov eax,1 ;sys_exit N} h%8\
int 80h ;kernel system call K;ML'
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x86 CPU,Windows,MASM32 n)H0;25L
.386 )K6{_~Kc\
.model flat,stdcall '[E_7$d
option casemap:none l`]!)j|+
;Include 文件定义 M*HG4(n0
include windows.inc O:x%!-w
include user32.inc n 3]y$wK
includelib user32.lib R{B~No w3
include kernel32.inc )5v .9N6v
includelib kernel32.lib ?C{N0?[P-
;数据段 ZM.g+-9
.data f$'D2o, O
szCaption db 'A MessageBox!',0 }>:X|4]
szText db 'Hello,world!',0 TK>}$.c%+
;代码段 2fk
.code T{M:)}V
start: f*~fslY,o
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK Ye6O!,R
invoke ExitProcess,NULL *~L]n4-
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> t*#&y:RG
end start I$LO0avvH2
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N-|Jj?c
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BEGIN { print "Hello, world!" } m t^1[
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BASIC u\wd<<I']
传统版BASIC(例如GWBASIC): iE`aGoA
p'4P2
10 PRINT "Hello, world!" A&'%ou
20 END &O,$l3 P
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或在提示符输入: -tdG}Gu
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?"Hello, world!":END ( -@>
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现代版BASIC(例如Quick BASIC): ;p ('cwU%
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Print "Hello, world!" AlxS?f2w
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以下的语句在Quick BASIC中同样有效: H/&Q,9sU21
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? "Hello,world!" IycxRig
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BCPL +GS=zNw#
GET "LIBHDR" HWBom8u0
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LET START () BE R.T-Pt ene
$( $ZO<8|bW
WRITES ("Hello, world!*N") vBx^zDe
$) =;=V4nKN
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Befunge Gf\_WNrSE+
"!dlrow olleH">v yFo5 pKF.J
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Brainfuck !.$P`wKr
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< [#Vr)\n
+++++++++++++++.>.+++.------.--------.>+.>. pQ{t< >
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C T}[vfIJD
#include <stdio.h> G{~p.?f:
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int main(void) Dt.Wb&V_w
{ :,,y63-f4
printf("Hello, world!\n"); %
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return 0; Q{hOn]"
} n0pe7/Ai
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C++ `h!&->
#include <iostream> Zr;=p"cXr
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int main() oJT@'{;*z
{ B[
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std::cout << "Hello, world!" << std::endl; ]#.&f]6l
return 0; &X,)+b=
} J)|K/W9
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C++/CLI pw yl,A
int main() wR4u}gb#q
{ *8H;KGe=
System::Console::WriteLine("Hello, world!"); 9z/_`Xd_
} p|V1Gh<
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C# (C Sharp) Bqlc+d:
class HelloWorldApp {WOfT6y+
{ d}cJ5!d
public static void Main() ldvxYq<:
{ O>5 u5n
System.Console.WriteLine("Hello, world!"); NOp=/
} &(^u19TKl
} G%jJ>T4
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, %O3^7i
COBOL `f+g A
IDENTIFICATION DIVISION. E*CQG;^=N
PROGRAM-ID. HELLO-WORLD. 1|w:xG^
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ENVIRONMENT DIVISION. z2V8NUn
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DATA DIVISION. [W=S8>
[<a%\:c m4
PROCEDURE DIVISION. c.A/{a
DISPLAY "Hello, world!". bk9~63tN+>
STOP RUN. .hNw1~Fj
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Common Lisp Nw&}qSN
(format t "Hello world!~%") W(lKR_pF
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WTv\HI2X
!
DOS批处理 I jztj
@echo off DLVs>?Y
echo "Hello, world!" H6S vU
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Eiffel SH$cn,3F8
class HELLO_WORLD `oRs-,d|<
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creation ff./DMDafI
make ^_h7!=W
feature wK`ieHmp
make is `Mp7})
local B%:9P
io:BASIC_IO T1!Gr!=
do 3=|2Gs?ut
!!io y&=19A#
io.put_string("%N Hello, world!") %<#3_}"T|
end -- make ^*ezj1
end -- class HELLO_WORLD UMi`u6#
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Erlang lF"(|n"R
-module(hello). S@zkoj@
-export([hello_world/0]). {2gd4[:
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hello_world() -> io:fwrite("Hello, World!\n"). =/QU$[7X(
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;(0$~O$3u
Forth ^pV>b(?qw
." Hello, world!" CR bKMR7&e.Ep
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Fortran {$1$]p~3o
WRITE(*,10) B"Kce"!
10 FORMAT('Hello, World!') IgR"euU
STOP J[Yg]6
END ^C)T M@+
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HTML 3?Eoj95w!
<HTML> X8SRQO^
<HEAD> \pD=Lv9
<TITLE> Hello World! </TITLE> V52C,]qQH
</HEAD> ie~fQ!rf
<BODY> V;hwAQbF
<p>Hello World!</p> [H:GKhPC`
</BODY> Z*9]:dG:!
</HTML> :Ip:sRz
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m":SE? {{&
INTERCAL -S%q!%}u
PLEASE DO ,1 <- #13 G!VF*yW8
DO ,1 SUB #1 <- #238 `=}UFu
DO ,1 SUB #2 <- #112 :{WrS
DO ,1 SUB #3 <- #112 'bI ~61{A
DO ,1 SUB #4 <- #0 dbuJ~?D,
DO ,1 SUB #5 <- #64 *xo;pe)9
DO ,1 SUB #6 <- #238 MjXE|3&
DO ,1 SUB #7 <- #26 hN_f h J
DO ,1 SUB #8 <- #248 hKZ`DB4
DO ,1 SUB #9 <- #168 ^?7dOW
DO ,1 SUB #10 <- #24 vG<pc_ak
DO ,1 SUB #11 <- #16 ?9gTk
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DO ,1 SUB #12 <- #158 %V(N U_o
DO ,1 SUB #13 <- #52 oS#'u1k
PLEASE READ OUT ,1 G>w?9:V}
PLEASE GIVE UP ~'NpM#A
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Java 4o4 =
public class Hello 4`U0">gY
{ 24jtJC,7
public static void main(String[] args) xBRh!w
{ {`H<=h__
System.out.println("Hello, world!"); M9s43XL(&
} m&`(pf4A
} 4OOn, 09
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JSP Y%0d\{@a
<% =0PRAc
out.print("Hello, world!"); w &|R5Q
%> bKuj
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"7yNKO;W
MIXAL &`yOIX-H_
TERM EQU 19 the MIX console device number y5/'!L)g
ORIG 1000 start address `/w\2n
START OUT MSG(TERM) output data at address MSG *K,hrpYR
HLT halt execution
$' (QTEM
MSG ALF "MIXAL" ) Kc%8hBv
ALF " HELL" 6mu<&m@
ALF "O WOR" )W1(tEq59
ALF "LD " BU9J_rCIv
END START end of the program Zgg'9E
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