“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。 o+
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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》。 */E5<DO
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以下是用不同语言写成的Hello World程序的几个例子: }='1<~0
Ada <ZgbmRY8
with Ada.Text_Io; use Ada.Text_Io; M3/_E7Qoj
procedure Hello is ieG%D
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begin 6A*k
Put_Line ("Hello, world!"); QzX|c&&>u2
end Hello; Cz]NSG 5
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汇编语言 zTQTmO
c&n.JV
x86 CPU,DOS,TASM '}.Z' %;
MODEL SMALL 8^ezqd`
IDEAL \oc*
STACK 100H l8Ks{(wh
y{]iwO;
DATASEG V [KFZSA
HW DB 'Hello, world!$' 6N {|;R@2
6
s1lf!
CODESEG c2d=dGP>~f
MOV AX, @data Hj^_Cp]@*
MOV DS, AX y7WO:X&
MOV DX, OFFSET HW (!^; ar^
MOV AH, 09H AQa;D2B$
INT 21H d-sK{ZC"y
MOV AX, 4C00H T`gR&n<D
INT 21H j65qIw_Z
END j`pX2S
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hd)HJb-aR
x86 CPU,GNU/Linux,NASM L!
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;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). tj=l!
;Enter this into "hello.asm" then type: wYIlp
;"nasm -f elf hello.asm" {e'V^l.v
;"ld hello.o -o hello" +ZK12D}
;"./hello" lay)I11->
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section .data ;data section declaration )S2GPn7
msg db 'Hello World!',0AH 7U_OUUg
len equ $-msg ;string length jX8,y
pa)2TL/@
section .text ;code section declaration z),@YJU"z
global _start ;entry point (start of execution) 8C(@a[V
_start: mov edx,len ;string length 5fqQ;r
mov ecx,msg ;string start "hi)p9 _cR
mov ebx,1 ;file handle: stdout HE0@`(mCpa
mov eax,4 ;sys_write sp'f>F2]
int 80h ;kernel system call d iG kwKj
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mov ebx,0 ;return value 8%W(",nd
mov eax,1 ;sys_exit ! >l)*jN8
int 80h ;kernel system call V$';B=M
#`(-Oj2hH
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x86 CPU,Windows,MASM32 C}>Pn{wY9
.386 P>s3Rh3:
.model flat,stdcall 5h6c W
option casemap:none y-i6StJ
;Include 文件定义 eW>Y*l%B
include windows.inc EmO{lCENk
include user32.inc @0{vA\
includelib user32.lib =2rkaBFC
include kernel32.inc F T/STI
includelib kernel32.lib 6)_svtg
;数据段 ltH?Ew<]
.data 0M_~@E*&
szCaption db 'A MessageBox!',0 3!:?OUhx
szText db 'Hello,world!',0 7g&"clRGO
;代码段 oP CtLz}z
.code x'IYWo
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start: 9p{7x[ C
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK r{pbUk
invoke ExitProcess,NULL *t3uj
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> g4-UBDtYt
end start K[~fpQGbV1
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AWK Hk8pKpn3
BEGIN { print "Hello, world!" } eNEMyv5{w4
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BASIC ]
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传统版BASIC(例如GWBASIC): Dq:>]4%
y/(60H,{{
10 PRINT "Hello, world!" ;VI/iwg
20 END mufJ@Y S#
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或在提示符输入: 8'}D/4MUr
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?"Hello, world!":END Ga
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现代版BASIC(例如Quick BASIC): .Fe_Z)i>h
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Print "Hello, world!" EO:
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n |e=7?H8
以下的语句在Quick BASIC中同样有效: +8#hi5e
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? "Hello,world!" aHR&6zj4
rOyKugHe
(+w>hCI
BCPL h.%)RW?
GET "LIBHDR" ^^FqN;
@cC@(M~Ru
LET START () BE 9H6%\#rw
$( fDU_eyt/Z'
WRITES ("Hello, world!*N") A`nw(f_/
$) {`>;I
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3 J!J#
Befunge KdTDBC
"!dlrow olleH">v %c"t`
, nA)KRCi
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{)L*\r
8v V<A*`
Brainfuck 3UX/
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< 4?2$~\
x
+++++++++++++++.>.+++.------.--------.>+.>. V[RsSZx
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C \zMx~-2oN
#include <stdio.h> _Q=h3(ZI
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int main(void) 4!k0
{ .s8u?1b
printf("Hello, world!\n"); &o]ic(74c?
return 0; &s>E~M0+J
} j+6`nN7L
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C++ &RL
j^A!
#include <iostream> NB=!1;^J
+{dJGPoY]p
int main() T_NN.Ol
{ qvN`46c
std::cout << "Hello, world!" << std::endl; lK yeG(
return 0; =_:Mx'7
} (BG
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C++/CLI I/`\>Hk
int main() 59X'-fg ,
{ Y0Bd[
System::Console::WriteLine("Hello, world!"); mi&mQQ
} f~-qjEWm
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C# (C Sharp) ul!e!^qwx
class HelloWorldApp ^EFVjGM
{ fB"It~ p
public static void Main() |Zm'! -_
{ JuM4Njz|
System.Console.WriteLine("Hello, world!"); O;CC(
} }h=}!R'm
} >Nr~7s
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COBOL -?Kd[Ma
IDENTIFICATION DIVISION. ;/s##7qf
PROGRAM-ID. HELLO-WORLD. &wea]./B
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ENVIRONMENT DIVISION.
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DATA DIVISION. Dxp.b$0t
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PROCEDURE DIVISION. m&{%6
DISPLAY "Hello, world!". v~`'!N8
STOP RUN. Qt(4N!j
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:vo#(
Common Lisp *DS>#x@3*i
(format t "Hello world!~%") 8Luw<Q
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qx2M"uFJ
DOS批处理 7rSads
@echo off *h4x`luJ
echo "Hello, world!" S*w; $`Y
>4iVVs
_sX@BE
Eiffel JK9 J;c#T
class HELLO_WORLD fj:q_P67o
,cCBAOueO
creation >#EOCo
make I6lWB(H!u
feature 4KnrQ-D
make is CEl9/"0s6
local TJ+,G4z
io:BASIC_IO >^TcO
do 6H'W]T&
!!io .F^372hH3
io.put_string("%N Hello, world!") JGG (mrvR
end -- make
q:vc;y
end -- class HELLO_WORLD W`g zMx
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Erlang l0nm>ps'D
-module(hello). ZMGthI}~-
-export([hello_world/0]). sMNhD/bb
G-Dc(QhU&
hello_world() -> io:fwrite("Hello, World!\n"). ?CSv;:
zn2Qp
wq
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Forth V8}jFib
." Hello, world!" CR {2=f,,|+f
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n1PV/ Z
Fortran NGL,j\(~7
WRITE(*,10) @*^%^ P
10 FORMAT('Hello, World!') `FHKQS5
STOP ?my2dd,|
END )=5,S~IT
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HTML Dt glPo_(
<HTML> HMl
M!Xk?
<HEAD> H}PZJf_E
<TITLE> Hello World! </TITLE> nk.j7tu
</HEAD> FfpP<(4
<BODY> eiJ~1HX)
<p>Hello World!</p> 7(plHW|
</BODY> i(an]%'v
</HTML> YF68Ax]
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INTERCAL c$b~?Mx
PLEASE DO ,1 <- #13 {N'<_%cu
DO ,1 SUB #1 <- #238 Y0xn}:%K
DO ,1 SUB #2 <- #112 SI9PgC
DO ,1 SUB #3 <- #112 ]CGH )4Pe
DO ,1 SUB #4 <- #0 49-wFF
DO ,1 SUB #5 <- #64 <Wa7$ h F
DO ,1 SUB #6 <- #238 \Y^GA;AMQQ
DO ,1 SUB #7 <- #26 "a=dx|
Z
DO ,1 SUB #8 <- #248 ~U+W4%f8
DO ,1 SUB #9 <- #168 e!oL!Zg
DO ,1 SUB #10 <- #24 z#Db~
DO ,1 SUB #11 <- #16 |"i"8~/@<
DO ,1 SUB #12 <- #158 Yx':~
DO ,1 SUB #13 <- #52 nNpXkI:
PLEASE READ OUT ,1 PsO>&Te