“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。 {mAU3x
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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》。 } \ZaE~
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以下是用不同语言写成的Hello World程序的几个例子: _-EyT
Ada r#XT3qp$d
with Ada.Text_Io; use Ada.Text_Io; ?M[ A7?
procedure Hello is ;VWAf;U;B
begin $sEy%-
Put_Line ("Hello, world!"); 'Fmvu
end Hello; o<N nV
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汇编语言 V{JAB]?^
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x86 CPU,DOS,TASM -;'1^
MODEL SMALL R)c'#St
IDEAL gvLf|+m
STACK 100H nw-I|PVTNa
P>Ez'C
DATASEG J>\B`E
HW DB 'Hello, world!$' 92EWIHEWZ
Z?\2F%
CODESEG }mAa}{_
MOV AX, @data ~$~5qwl
MOV DS, AX p\<u6v ~J
MOV DX, OFFSET HW %"P,1&\^
MOV AH, 09H Dc_yM
INT 21H @;'o2
MOV AX, 4C00H 1PpyV f
INT 21H qzTuxo0B
END )a-Du$kd
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ariLG [:X
x86 CPU,GNU/Linux,NASM nJo`B4'U
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). NUp<e%zB
;Enter this into "hello.asm" then type: %@u;5qD&
;"nasm -f elf hello.asm" Sv +IS
;"ld hello.o -o hello" rnF/H=I/
;"./hello" p>upA)W]
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section .data ;data section declaration 7k rUKYVo
msg db 'Hello World!',0AH Z:*76PP,
len equ $-msg ;string length l6d$V9A
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section .text ;code section declaration L|,!?cSAT
global _start ;entry point (start of execution) ;UfCj5`Q)4
_start: mov edx,len ;string length ypy68_xyW
mov ecx,msg ;string start PS[+~>%
mov ebx,1 ;file handle: stdout PbmDNKEh{
mov eax,4 ;sys_write S;)w.
int 80h ;kernel system call ;dJ1
-q*i_r:,
mov ebx,0 ;return value O<,\^[x
mov eax,1 ;sys_exit k3uit+ge}
int 80h ;kernel system call LbkF
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x86 CPU,Windows,MASM32 O)jWZOVp >
.386 lR(+tj)9uO
.model flat,stdcall =17t-
[
option casemap:none H XmS|PX
;Include 文件定义 "OdXY"G
include windows.inc WS`qVL]^&
include user32.inc 'L8'
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includelib user32.lib }&[
include kernel32.inc i(NdGL#P
includelib kernel32.lib w$Rro)?}7
;数据段 sNLs\4v
.data NB8/g0:=n&
szCaption db 'A MessageBox!',0 (,8$V\
szText db 'Hello,world!',0 H(Z88.OM
;代码段 MerFZd 1
.code @WVcY:1t#
start: /@,j232
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK 6=fSE=]DY
invoke ExitProcess,NULL urjjw.wZ
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> @9lUSk^9
end start 1
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AWK o<|P9#(U"
BEGIN { print "Hello, world!" } }3OKC2K~
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BASIC ;u>DNG|.
传统版BASIC(例如GWBASIC): `nZ )>
RE/~#k@a
10 PRINT "Hello, world!" 1fZ(l"
20 END e=+?K5q{P(
7*?}:
或在提示符输入: Mw;sLsu
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?"Hello, world!":END HlH64w2^R
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现代版BASIC(例如Quick BASIC): p{j.KI s7
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Print "Hello, world!" .n~M(59
AD|2qM))
以下的语句在Quick BASIC中同样有效: ~x]jB
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? "Hello,world!" <c2'0I >
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BCPL lx[oaCr
GET "LIBHDR" ,"HL~2:~
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LET START () BE _Nqt21sL
$( /,g ,Ch<d
WRITES ("Hello, world!*N") r(RKwr:m
$) pLLGus+W
Bi
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%>g3~yl
Befunge j4cwI90=
"!dlrow olleH">v 2(#7[mgPI
, 0sfr d
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//s:5S<Z
Brainfuck !X;1 }
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< SUU !7Yd|
+++++++++++++++.>.+++.------.--------.>+.>. N _86t
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C a- |*?{o
#include <stdio.h> Bg|5KOnd
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int main(void) Y07ZB'K
{ '.81zpff
printf("Hello, world!\n"); 5'X ]k@m_
return 0; K*X_FJ
} P_Gw-`L5T
RT.D"WvT
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C++ "O%gFye
#include <iostream> MP4z-4Y
!BOY@$Y
int main() %)0*&a 4
{ Fd[zDz
std::cout << "Hello, world!" << std::endl; jhb6T ?}
return 0; qa0 yg8,<
} $>u*}X9
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B(n{e53 9f
C++/CLI Nw1#M%/!r!
int main() A^y|J`k|
{ Vv.|br`;}
System::Console::WriteLine("Hello, world!"); R'!
} br":y>=,
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C# (C Sharp) xT+zU} z
class HelloWorldApp ~;#Y9>7\\'
{ 6y9t(m
public static void Main() 29?,<bB)
{ d;>#Sxf
System.Console.WriteLine("Hello, world!"); ,^eYlmT>6
} G"Sd@%W(
} VrxQc qPr`
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COBOL 4'!c*@Y
IDENTIFICATION DIVISION. ?C&z]f3(:
PROGRAM-ID. HELLO-WORLD. K0}pi+=
cM$P`{QrM
ENVIRONMENT DIVISION. ]Zyur`
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DATA DIVISION. @jsDq
Ln
.`4{9?bR
PROCEDURE DIVISION. '~&9D:(
DISPLAY "Hello, world!". #py[
STOP RUN. |ayVjqJ*
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@!yMIM%P
Common Lisp 7:)n$,31FW
(format t "Hello world!~%") s3R(vd
DW_1,:,?7l
}L# _\
DOS批处理 $0lD>yu
@echo off MBhWMCN2
echo "Hello, world!" nysUZB
OVhE??#
Y[$!`);Ye
Eiffel \8?Tdx=
class HELLO_WORLD * Of4o
Z`KC%!8K
creation ysQ,)QoiR{
make f-E("o
feature ~,5gUl?Il
make is 5[YDZ7g"~
local }5}.lJ:
io:BASIC_IO =W BTm
do #7q7PYG4
!!io 2gq9k}38
io.put_string("%N Hello, world!") @]-jl}:]
end -- make @++.FEf
end -- class HELLO_WORLD 1M
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Erlang ),ma_{$N
-module(hello). f'VX Y-
-export([hello_world/0]). i-6F:\;
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hello_world() -> io:fwrite("Hello, World!\n"). |(q9"
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h >s!K9
Forth BC&9fr
." Hello, world!" CR 8_tK4PwP
HY%i`]4X
~R2 6
Fortran p%R
WRITE(*,10) .[JYj(p
10 FORMAT('Hello, World!') <\pfIJr$
STOP */|9= $54
END I|
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pt?q#EfFJ
HTML UmclTGn
<HTML> (r D_(%o
<HEAD> yGPS`S
<TITLE> Hello World! </TITLE> ^]a #7/]o
</HEAD> P:aJ#
<BODY> "0cID3A$
<p>Hello World!</p> ek}a}.3 {
</BODY> zOa_X~!@
</HTML> 9)gC6IiW
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~ y;6W0x
INTERCAL ?Vdia:
PLEASE DO ,1 <- #13 52,m:EhL
DO ,1 SUB #1 <- #238 0 SNIYkGE
DO ,1 SUB #2 <- #112 I{*<