“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。 1MbY7!?PG
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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》。 9W{,=.%MX$
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以下是用不同语言写成的Hello World程序的几个例子: ==%`e/~Y
Ada &$mZ?%^C
with Ada.Text_Io; use Ada.Text_Io; F&=I7i
procedure Hello is !]$V9F{K
begin R%>jJ[4\[
Put_Line ("Hello, world!"); 9#v-2QY
end Hello; @v>l[6]>^
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汇编语言 y,MPGW_
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x86 CPU,DOS,TASM `wNm%*g
MODEL SMALL Oo FgQEr@
IDEAL (C,e6r Y
STACK 100H ;tJWOm
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DATASEG sW
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HW DB 'Hello, world!$' [/
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h S4.3]ei
CODESEG ?nQ_w0j
MOV AX, @data )VNM/o%Q
MOV DS, AX J!rY
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MOV DX, OFFSET HW oFWt(r
MOV AH, 09H ?Phk~ jE
INT 21H js~tKUvg
MOV AX, 4C00H GxxDY]!
INT 21H Yl$X3wi
END xpF](>LC(
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vkJ)FEar
x86 CPU,GNU/Linux,NASM
Do|]eD
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). )D;*DUtMVm
;Enter this into "hello.asm" then type: ^V[/(Lq
;"nasm -f elf hello.asm" d^PD#&"g
;"ld hello.o -o hello" LIF|bE9kd
;"./hello" m#JI!_~!
5L F/5`
section .data ;data section declaration C\7u<2c
msg db 'Hello World!',0AH hi!`9k
len equ $-msg ;string length ^o YPyk`9
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section .text ;code section declaration e9&+vsRmA
global _start ;entry point (start of execution) Q
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pCM
_start: mov edx,len ;string length {3LA%xO
mov ecx,msg ;string start ^=^$tF
mov ebx,1 ;file handle: stdout n0Go p^3
mov eax,4 ;sys_write -IadHX}]t
int 80h ;kernel system call ld.7`)
[& ^RP,N~
mov ebx,0 ;return value % #u.J
mov eax,1 ;sys_exit |m)kN2w
int 80h ;kernel system call ,9d9_c.T
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x86 CPU,Windows,MASM32 \6o\+OQk
.386 P>(P2~$Y"
.model flat,stdcall zzJja/mp
option casemap:none 'f+NW&
;Include 文件定义 KVN"XqE4
include windows.inc n"w>Y)C(X)
include user32.inc _MWW
includelib user32.lib !Qq~lAJO;
include kernel32.inc =6a=`3r!I
includelib kernel32.lib y[ZVi5) ,
;数据段 F9k}zAY\J
.data 2?F?C
szCaption db 'A MessageBox!',0 97dF
szText db 'Hello,world!',0 j-d542"
;代码段 [0D.+("EW
.code =om<* \vsO
start: [HhaBy9
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK BCO (,k
invoke ExitProcess,NULL v6H!.0
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Pv|sPIIB7
end start W/VEB3P>Z
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AWK {Y3:Y+2X3*
BEGIN { print "Hello, world!" } 5&.I9}[)j
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cd`P'GDF
BASIC 8_Z"@
传统版BASIC(例如GWBASIC): _q4Yq'dI
;Fd1:"1pP
10 PRINT "Hello, world!" b'I@TLE')
20 END >U.7>K
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或在提示符输入: _C=01 %/
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?"Hello, world!":END wb%4f6i
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现代版BASIC(例如Quick BASIC): WpOH1[8v
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Print "Hello, world!" %_G '#Bn<
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以下的语句在Quick BASIC中同样有效: RRro.r,
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? "Hello,world!" !hE F.S
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BCPL 3m~,6mQ
GET "LIBHDR" -c{ Y+M`
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LET START () BE p&\DG
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WRITES ("Hello, world!*N") L8oqlq(
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Befunge a@AIv"q
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Brainfuck i>C%[dk9
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< ZXf&pqmG
+++++++++++++++.>.+++.------.--------.>+.>. Q(R-8"
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#include <stdio.h> j3S!uA?
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int main(void) Ir(U7D
{ HdTB[(
printf("Hello, world!\n"); f3s4aARP
return 0; ZkdSgc')
} fJ=(oF=
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C++ m:k;?p:x
#include <iostream> KM[&WT
h
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int main() PG@C5Rnu
{ n\$.6
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std::cout << "Hello, world!" << std::endl; =B`=f,,#3
return 0; T hVq5
} sp_19u
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C++/CLI AbQnx%$u
int main() J<9})
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{ )EcfEym.>
System::Console::WriteLine("Hello, world!"); e:.D^GFi
} Yf1%7+V35
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C# (C Sharp) %6&c3,?U\n
class HelloWorldApp X@/wsW(kM\
{ A6xN6{R!
public static void Main() ]w]:9w
{ q6o}2<T@
System.Console.WriteLine("Hello, world!"); TXbi>t:/S{
} cKIA.c}N
} j#l1KO^y
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COBOL 0&3zBL%Bo
IDENTIFICATION DIVISION. @mcP-
PROGRAM-ID. HELLO-WORLD. $_|jI
^
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ENVIRONMENT DIVISION. ++!0r['+>
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DATA DIVISION. #9A*B bY
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PROCEDURE DIVISION. q 1A0-W#4
DISPLAY "Hello, world!". n0uL^{B
STOP RUN. awLSY:JI
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Nig)!4CG
Common Lisp &}0#(Fa`
(format t "Hello world!~%") J$(79gH{
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DOS批处理 9 vNz
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@echo off y)7;"3Q<
echo "Hello, world!" `Tr !Gj_
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Eiffel b^<7@tY
class HELLO_WORLD C-(O*hK
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creation
G%%5lw!y'
make Enhrkk
feature V)mi1H|m
make is :eSwXDy&
local ~b9fk)z!
io:BASIC_IO raZ0B,;eFu
do &Z+.FTo
!!io ?cD_\~
io.put_string("%N Hello, world!") [t]q#+Zs
end -- make v2>Dn=V
end -- class HELLO_WORLD ahw0}S
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Erlang okBaQH2lUl
-module(hello). "I3&a1*
-export([hello_world/0]). /$UWTq/C7
]=ApYg7!
hello_world() -> io:fwrite("Hello, World!\n"). ZY7-.
p),*4@2<
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Forth oL R/\Y(
." Hello, world!" CR
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Fortran 4qE4 i:b
WRITE(*,10) ( sl{Rgxe*
10 FORMAT('Hello, World!') XNx$^I=
STOP 3mYW]
END f4AN"rW
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HTML KI#v<4C$P
<HTML> [ /*;}NUv
<HEAD> Xl2g Hh
<TITLE> Hello World! </TITLE> *)B \M>
</HEAD> P}a$#a'!
<BODY> j+-`P5
<p>Hello World!</p> 3t.!5L
</BODY> |[5;dt_U/
</HTML> ,0AS&xs$
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INTERCAL " v
wLj:
PLEASE DO ,1 <- #13 1TA!9cz0Z
DO ,1 SUB #1 <- #238 5QXU"kWH
DO ,1 SUB #2 <- #112 +PsR*T
DO ,1 SUB #3 <- #112 PCgr`($U
DO ,1 SUB #4 <- #0 52#
*{q}
DO ,1 SUB #5 <- #64 ,MJddbcg
DO ,1 SUB #6 <- #238 KLG .?`h:
DO ,1 SUB #7 <- #26 Rl0"9D87z
DO ,1 SUB #8 <- #248 |zfFB7}v
DO ,1 SUB #9 <- #168 S?i^ ~
DO ,1 SUB #10 <- #24 5"3`ss<m
DO ,1 SUB #11 <- #16 OA9P"*
DO ,1 SUB #12 <- #158 tFn[U#'
DO ,1 SUB #13 <- #52 ^)Y3V-@t
PLEASE READ OUT ,1 Si~wig2
PLEASE GIVE UP bvZD@F`2
rmvrv.$3
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Java H@zv-{}T8
public class Hello zCA8}](C^
{ xA:;wV
public static void main(String[] args) B[8RBTsA
{ [-Y~g%M
System.out.println("Hello, world!"); GFbn>dY
} `aX+Gz?
} +U,t*U4,
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$?:IRgAr
JSP W"#<r
<% yCkWuU9
out.print("Hello, world!"); Dn#5H{D-d
%> mqJD+ K
w >
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8aRmHy"9l
MIXAL Jr2>D=
TERM EQU 19 the MIX console device number (?XIhpd
ORIG 1000 start address qx >Z@o
START OUT MSG(TERM) output data at address MSG =w _T{V
HLT halt execution UDJ#P9uy
MSG ALF "MIXAL" l1 08.ao
ALF " HELL" 5)k/4l '
ALF "O WOR" Lnn^j#n
ALF "LD " {#z47Rz
END START end of the program |yOIC,5[JW
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Nuva L=!h`k
<..直接输出..> &2@Rc?!6_P
Hello, world! Oa@SyroF=
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<..或者..> ~]W
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r_'];
<. F)'_,.?0
// 不带换行 G6Wa0Z
? "Hello, world!" srImk6YD
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// 或者 :u@ w;
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// 带换行 9*n?V ;E
?? 'Hello, world!' t?weD{O
.> Gh{9nM_\"
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OCaml MM@&Q