“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。 pI>[^7
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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》。 BwpSw\\?@
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以下是用不同语言写成的Hello World程序的几个例子: &`9p.
Ada lo!.%PP|
with Ada.Text_Io; use Ada.Text_Io; 9CxFj)#5F
procedure Hello is X}W4dpU,
begin DUAI
Put_Line ("Hello, world!"); _!} L\E~
end Hello; !97k
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汇编语言 |@+/R .l
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x86 CPU,DOS,TASM k v>rv37u
MODEL SMALL x e!([^l&
IDEAL z"vI-~,YU
STACK 100H T-
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?q%&"
DATASEG KH~o0 W
HW DB 'Hello, world!$' 'Y%@fZf x
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CODESEG !L=RhMI
MOV AX, @data b":3J)Y6.
MOV DS, AX 6N<v&7cSB
MOV DX, OFFSET HW 2j UEL=+Y
MOV AH, 09H *MG*]\D
INT 21H 5r-OE-U{
MOV AX, 4C00H JSAbh\Mq6
INT 21H hbOyrjanx
END gpe/ dfyJ9
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x86 CPU,GNU/Linux,NASM QR#L1+Hn
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). NQdz]o
;Enter this into "hello.asm" then type:
RM(MCle}
;"nasm -f elf hello.asm" jmH=W)
;"ld hello.o -o hello" ~hk;OB;
;"./hello" E;vF
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section .data ;data section declaration BS@x&DB
msg db 'Hello World!',0AH Z.iQm{bI
len equ $-msg ;string length ]DO~7p[
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section .text ;code section declaration ,1! ~@dhs
global _start ;entry point (start of execution) + bU*"5"
_start: mov edx,len ;string length 'WC>
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mov ecx,msg ;string start b;K];o-/f
mov ebx,1 ;file handle: stdout keMfK]9
mov eax,4 ;sys_write WC pCWtmy
int 80h ;kernel system call L#}HeOEi[
D J:N
mov ebx,0 ;return value
el"XD"*
mov eax,1 ;sys_exit 6M/*]jLq4
int 80h ;kernel system call '20S oVp
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x86 CPU,Windows,MASM32 $OAak
.386 0Gr ^#`
.model flat,stdcall "{lw;AA5F
option casemap:none VOY#Y*)g
;Include 文件定义 (=/%_jj
include windows.inc Q6e;hl
include user32.inc O5lP92],
includelib user32.lib v1m'p:7uGB
include kernel32.inc w9c^IS
includelib kernel32.lib VGPBD-6)
;数据段 {$ (X,E
.data @8;0p
szCaption db 'A MessageBox!',0 Ug1[pONk
szText db 'Hello,world!',0 -{=c T?"+
;代码段 e+? -#
.code WbP
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start: D#pZN,'
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK 5e|2b] f$
invoke ExitProcess,NULL waYH_)Zx
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> dPtQ
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end start yE6EoC^
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BEGIN { print "Hello, world!" } ]JUb;B;Z
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BASIC $zR[2{bg
传统版BASIC(例如GWBASIC): &AS<2hB
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10 PRINT "Hello, world!" P_Bhec|#fT
20 END ,]\: ]Y&?
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或在提示符输入: CQ(
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?"Hello, world!":END V.f'Cw
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现代版BASIC(例如Quick BASIC): G9_M~N%a
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Print "Hello, world!" TX%W-J_
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以下的语句在Quick BASIC中同样有效: =64%eF
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? "Hello,world!" JOA_2qa>\
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BCPL -T 5$l
GET "LIBHDR" rP=!!fC1;
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LET START () BE |}O9'fyU8
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WRITES ("Hello, world!*N") }$zJdf,\
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Befunge =)p/p6
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Brainfuck FQ72VY
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C BUozpqN}
#include <stdio.h> YnCWmlC
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int main(void) pKM5<1J
{ q%/ciPgE
printf("Hello, world!\n"); g3i !>
return 0; luEP5l2&
} 1 ^k#g,
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C++ aKly1G
#include <iostream> #CM^f^*
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int main() }g? 9/)z
{ 4*<27
std::cout << "Hello, world!" << std::endl; A^a9,T
return 0; B_B~Y8=3`
} SAa
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C++/CLI <^Hh5kfS'
int main() 'yWv @)
{ Q>FuNdUk
System::Console::WriteLine("Hello, world!"); +QqEUf<U*,
} ]('isq,P
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C# (C Sharp) CDz-IQi
class HelloWorldApp n-cz xq%n
{ !u}} V
public static void Main() kdWk{ZT^
{ X5@rPGc
System.Console.WriteLine("Hello, world!"); CpAdE m{
} U73{Uv
} T]5JsrT
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COBOL 41595x:
IDENTIFICATION DIVISION. Jk.Ec)w
PROGRAM-ID. HELLO-WORLD. xY/
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ENVIRONMENT DIVISION. tcg sXB/t
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DATA DIVISION. 4YVxRZ1[3
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PROCEDURE DIVISION. ,UdTUw~F
DISPLAY "Hello, world!". ijYSYX@
STOP RUN. YdI|xu>0A^
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Common Lisp !2('Cq_^
(format t "Hello world!~%") *lN>RWbM%
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DOS批处理 t._W643~
@echo off 07T"alXf:A
echo "Hello, world!" &oWdBna"_
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Eiffel T[iwP~l
class HELLO_WORLD |zV-a2K%J
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creation x)hp3&L
make x.7Ln9
feature ?PIOuN=
make is :VPZGzK4
local <B;l).[6
io:BASIC_IO r )cGee
do -Kj^ l3w
!!io 0ih=<@1 K
io.put_string("%N Hello, world!") o)P'H"Ki
end -- make Y9TaU]7]
end -- class HELLO_WORLD gE/O29Y
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Erlang 9:bC{n
-module(hello).
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-export([hello_world/0]). D]9I-|
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hello_world() -> io:fwrite("Hello, World!\n"). 9HlRf6S
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Forth |pv:'']J
." Hello, world!" CR Qa nE]
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Fortran 9PA\Eo|Yb
WRITE(*,10) F/\w4T
10 FORMAT('Hello, World!') i6)$pARp
STOP j*m7&wOE
END Z-RgN
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HTML [s-Km/
<HTML> Uhc2`r#q
<HEAD> k0{5)Su"xr
<TITLE> Hello World! </TITLE> "-Lbz)k
</HEAD> W9~vBU
<BODY> !3{>
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<p>Hello World!</p> C>q,c3s5
</BODY> g_G'%{T7
</HTML> 1&~u:RUXe
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INTERCAL DUc
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PLEASE DO ,1 <- #13 >A#wvQl7
DO ,1 SUB #1 <- #238 u/e-m/
DO ,1 SUB #2 <- #112 nz:I\yA
DO ,1 SUB #3 <- #112 gG0P &9xz
DO ,1 SUB #4 <- #0 Kc+;"4/#q
DO ,1 SUB #5 <- #64 K.?~@5%
DO ,1 SUB #6 <- #238 ve2GRTO^aC
DO ,1 SUB #7 <- #26 LlP_`fA
DO ,1 SUB #8 <- #248 s+>VqyHgf
DO ,1 SUB #9 <- #168 agqB#,i
DO ,1 SUB #10 <- #24 MR/jM@8
DO ,1 SUB #11 <- #16 (MiEXU~v
DO ,1 SUB #12 <- #158 TC1#2nE&T
DO ,1 SUB #13 <- #52 .'C$w1[w
PLEASE READ OUT ,1 &A