“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。 /4%ycr6
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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》。 H?$gHZPI
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以下是用不同语言写成的Hello World程序的几个例子: (\*+HZ`(Uu
Ada [z> Ya-uz7
with Ada.Text_Io; use Ada.Text_Io; @; 0t+
procedure Hello is `R@b`3*%v
begin -_+,HyJP
Put_Line ("Hello, world!"); -E,p[Sp
end Hello; 3}gf%U]L
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汇编语言 3JXKpk?
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x86 CPU,DOS,TASM pL pBP+i
MODEL SMALL -H9WwFk
IDEAL i[40p!~
STACK 100H D+('1E?
p$_X\,F
DATASEG 6:3F,!J!
HW DB 'Hello, world!$' ^<w3i?KPW
.XPPd?R
CODESEG Ot([5/K
MOV AX, @data &09g0K66
MOV DS, AX ,Uu#41ZOKL
MOV DX, OFFSET HW st-I7K\v
MOV AH, 09H B0$.oavC
INT 21H SJ).L.Cm6
MOV AX, 4C00H q^^&nz<A
INT 21H E=L1q)
END {bMOT*X=A
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x86 CPU,GNU/Linux,NASM IfzZ\x
.
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). 9KDm<Q-mf
;Enter this into "hello.asm" then type: K}TSwY
;"nasm -f elf hello.asm" v%!'vhf_K
;"ld hello.o -o hello" x}X
hL
;"./hello" \>p\~[cxt
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section .data ;data section declaration `|f1^C^
msg db 'Hello World!',0AH .kZ<Q]Vk
len equ $-msg ;string length f/3rcYR;y
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section .text ;code section declaration gib'f@i ;
global _start ;entry point (start of execution) 26[m7\O
_start: mov edx,len ;string length >o|.0aw<
mov ecx,msg ;string start ]=?.LMjnH
mov ebx,1 ;file handle: stdout /j;HM[
mov eax,4 ;sys_write t2RL|$>F1
int 80h ;kernel system call iNv"!'|
">x"BP
mov ebx,0 ;return value "s.s(TR8
mov eax,1 ;sys_exit -mqL[ h,
int 80h ;kernel system call &"mWi-Mpl
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7 p[NuU*Gg
x86 CPU,Windows,MASM32 0q_?<v_1
.386 \<Di|X1
.model flat,stdcall )kvrQ6
option casemap:none E<r<ObeRv`
;Include 文件定义 OXD*ZKi8
include windows.inc !T$h?o
include user32.inc gRg8D{
includelib user32.lib [,Fu2j]
include kernel32.inc
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includelib kernel32.lib Uj twOv|pF
;数据段 Bnh*;J0
.data H-jxH,mJmW
szCaption db 'A MessageBox!',0 /A1qTG=Br
szText db 'Hello,world!',0 U)] }EgpF
;代码段 21 N!?DR
.code aqKrf(Rv
start: !;E{D
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK SshjUNx
invoke ExitProcess,NULL LjPpnjU
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Z!*k 0<Z
end start m*'87a9q0
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AWK |G(I,EPag
BEGIN { print "Hello, world!" } kS<9cy[O
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} bm ^`QY
BASIC ~=gpn|@b
传统版BASIC(例如GWBASIC): CSlPrx2\
1-}M5]Y
10 PRINT "Hello, world!" 2k+u_tj>
20 END G!E1N(%o
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或在提示符输入: '4,>#D8@O
:ioD*k
?"Hello, world!":END Ah_0o_Di
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现代版BASIC(例如Quick BASIC): Pa-{bhllu)
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Print "Hello, world!" nHl{'|~
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以下的语句在Quick BASIC中同样有效: 3Uy(d,N
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? "Hello,world!" Qq3UC%Z1
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BCPL wVkRrFJ
GET "LIBHDR" cBQ+`DXn5c
3 uJ?;
LET START () BE ?xw0kXK4
$( fr<V])
WRITES ("Hello, world!*N") );d"gv(]D
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p{[(4}ql
Befunge eu0jjeB
"!dlrow olleH">v nx@,oC4
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+++++++++++++++.>.+++.------.--------.>+.>. FTWjIa/[
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C yZc#@R[0
#include <stdio.h> P.-
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int main(void)
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{ 1t}
printf("Hello, world!\n"); f7:}t+d
return 0; ]nq/yAF%
} LvNulMEK
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C++ VM<$!Aaz
#include <iostream> aUq2$lw1
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int main() {\gpXVrn_
{ =s&ycc;-5}
std::cout << "Hello, world!" << std::endl; %Ot*k%F
return 0; FT\%=>{
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S=G2%u!;
C++/CLI v {)8QF]
int main() r9n:[A&HE
{ Mk}*ze0%
System::Console::WriteLine("Hello, world!"); i&j]FX6q
} Ll, U>yo
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C# (C Sharp) LIn2&r:U
class HelloWorldApp Sl'{rol'
{ Z29aRi
public static void Main() u}89v1._Jn
{ XrI$@e*
System.Console.WriteLine("Hello, world!"); \-8aTF
} (*9-Fa
} w<Bw2c
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xtut S
COBOL mJYD"WgY
IDENTIFICATION DIVISION. !C ZFbz~:
PROGRAM-ID. HELLO-WORLD. Q 3/J@MC
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ENVIRONMENT DIVISION. g} pD%
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DATA DIVISION. qB3E
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PROCEDURE DIVISION. /0Mt-8[
DISPLAY "Hello, world!". ;9LOeH?
STOP RUN. :*s@L2D6
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Common Lisp a'A<'(yv
(format t "Hello world!~%") w~yC^`
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';v1AX}5q
DOS批处理 p(nEcu
@echo off =.w~qL
echo "Hello, world!" MGY0^6yK5
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Eiffel P#D|CP/Cu
class HELLO_WORLD J 5xMA-
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creation >GLoeCRNu
make UmY{2 nzY
feature x2'pl
(^
make is %NM={X|'
local |>Fz:b d
io:BASIC_IO a&UzIFdB
do (L yK o
!!io vPc*x5w-
io.put_string("%N Hello, world!") `5!AHQ/
end -- make qDU4W7|T`
end -- class HELLO_WORLD jw`05rw:
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Erlang BC\W`K
-module(hello). lQBEq"7$
-export([hello_world/0]). +k~0&lZi
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hello_world() -> io:fwrite("Hello, World!\n"). r)OiiD"
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Forth DR,7rT{$
." Hello, world!" CR Cs
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h(<>s#=E
#9Ect@?N0
Fortran 0{ ~2mgg h
WRITE(*,10) T\g+w\N
10 FORMAT('Hello, World!') {dm>]@"S
STOP 6`20
END l#%7BGwzY
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HTML tfZ@4%'
<HTML> ^m&I^ \
<HEAD> w;j<$<4=7
<TITLE> Hello World! </TITLE> <U1T_fiBoc
</HEAD> 7 4MxU
<BODY> }Z FoCMM
<p>Hello World!</p> sZT~5c8
</BODY> 8Znr1=1
</HTML> Tjq1[Wq
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INTERCAL NsP=l]
PLEASE DO ,1 <- #13 8FMxn{k2
DO ,1 SUB #1 <- #238 .P aDR |!
DO ,1 SUB #2 <- #112 peBHZJ``RX
DO ,1 SUB #3 <- #112 z!O;s
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DO ,1 SUB #4 <- #0 ZY]$MZf5yo
DO ,1 SUB #5 <- #64 ]oVP_ &E
DO ,1 SUB #6 <- #238 iD G&