“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。 |e&Kg~~C
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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》。 'zK*?= ^jk
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以下是用不同语言写成的Hello World程序的几个例子: 7i.aZ2a%
Ada sSUd;BYf
with Ada.Text_Io; use Ada.Text_Io; (.o'1'
procedure Hello is W( YJz#]6_
begin Kq$1lPI
Put_Line ("Hello, world!"); 7ZZt|bl
end Hello; {wI0 =U
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汇编语言 y e'5A
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x86 CPU,DOS,TASM h#
8b #
MODEL SMALL
ty> O}9%
IDEAL -;}Wm[
STACK 100H 6EY4@0%A
kx[8#+P
DATASEG E<dN=#f6
HW DB 'Hello, world!$' &&O=v]6,V
*Y Ox`z!R
CODESEG \`C3;}o:"P
MOV AX, @data Ek3O{<
MOV DS, AX k1J}9HNYR
MOV DX, OFFSET HW /
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MOV AH, 09H 1zRO==b
INT 21H ] ?(=rm9u
MOV AX, 4C00H }g?]B +0
INT 21H 1o%Hn"uG
END
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x86 CPU,GNU/Linux,NASM t
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;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). kWFR(J&R
;Enter this into "hello.asm" then type: )Pq.kn{Sp
;"nasm -f elf hello.asm" K4BMa]/U
;"ld hello.o -o hello" S[M$>
;"./hello" |4vk@0L
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section .data ;data section declaration WlUE&=|Oz2
msg db 'Hello World!',0AH ']Z8C)tK
len equ $-msg ;string length xpz
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section .text ;code section declaration Jp- hFD
global _start ;entry point (start of execution) \Z8!iruN
_start: mov edx,len ;string length {`VQL 6(i
mov ecx,msg ;string start h.nz kp5
mov ebx,1 ;file handle: stdout !?{5ET,gtN
mov eax,4 ;sys_write I8y\D,
int 80h ;kernel system call \GWC5R7Q0j
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mov ebx,0 ;return value 1Q<a+
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mov eax,1 ;sys_exit Yh=Zn[U
int 80h ;kernel system call eo!z>9#.
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x86 CPU,Windows,MASM32 3?:}lY<,
.386 Eq
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.model flat,stdcall <$E8T>U
option casemap:none M5]wU
;Include 文件定义 # /T)9 =m
include windows.inc /-T%yuU
include user32.inc lI9 3{!+>
includelib user32.lib y03l_E,
include kernel32.inc HM/ qB^
includelib kernel32.lib 7DDot_qb
;数据段 kDsUKO
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.data rAWBuEU;!
szCaption db 'A MessageBox!',0 i>;G4
szText db 'Hello,world!',0 [{YV<kN
;代码段 %llG/]q#
.code "LYob}_z
start: zC7;Zj*k
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK Z\x6
invoke ExitProcess,NULL "'%x|nB
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> xfb%bkr
end start J#\/znT
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BEGIN { print "Hello, world!" } ,Fb#%r%
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BASIC 4_$f"6
传统版BASIC(例如GWBASIC): AWw:N6\
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10 PRINT "Hello, world!" ipsNiFv:
20 END /)~McP3
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或在提示符输入: @_;6L
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?"Hello, world!":END PqfH}d0l
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现代版BASIC(例如Quick BASIC): gbvBgOp
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Print "Hello, world!" il:""x7^y
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以下的语句在Quick BASIC中同样有效: qFay]V(O|
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? "Hello,world!" h<?Vzl
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BCPL \o/oM,u
GET "LIBHDR" PWTAy\
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LET START () BE p0Vw@R=
$( o;t{YfK
WRITES ("Hello, world!*N") Ba"Z^(:
$) t ,0~5>5
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Befunge ;lGjj9we>
"!dlrow olleH">v f+rBIE
, wEdXaOEB5
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++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< !aLL|}S
+++++++++++++++.>.+++.------.--------.>+.>. Ax&+UxQ0|
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C (|W@p\Q
#include <stdio.h> #U^@)g6
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int main(void) <=WQs2
{ )AnX[:y
printf("Hello, world!\n"); lE4.O
return 0; Y#KgaZ7N
} i),W1<A1
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C++ }z}oVc
#include <iostream> v=!]t=P)t
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int main() K?) &8S
{ @X|Cu bJ
std::cout << "Hello, world!" << std::endl; E;k'bz
return 0; 9%|!+!j
} }yUZ(k#
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C++/CLI 8dP^zjPj
int main() `C,47 9~J
{ #5F\zeo@F?
System::Console::WriteLine("Hello, world!"); $cnIsyKWY
} $Die~rPU
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C# (C Sharp) /.P*%'g
class HelloWorldApp <f1Pj
{ (,[Oy6o
public static void Main() sk9*3d5I
{ q* +}wP
System.Console.WriteLine("Hello, world!"); G >bQlZG
} LXrnAt
} >a[)F
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COBOL 2}K7(y!?u
IDENTIFICATION DIVISION. 4;x{@Ln
PROGRAM-ID. HELLO-WORLD. :2}zovsdj
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ENVIRONMENT DIVISION. bP(xMw<'j
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DATA DIVISION. LJ9^:U
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PROCEDURE DIVISION. (z#qkKL{^
DISPLAY "Hello, world!". iCnKQG
STOP RUN. Ng2qu!F7
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Common Lisp W-2,QVp%
(format t "Hello world!~%") ,F]Y,"x:
]:d`=V\&N
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DOS批处理 xh,};TS(K
@echo off -r7*C:E
echo "Hello, world!" |#>\GU=!
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h@&&.S`B
Eiffel ^fa+3`>
class HELLO_WORLD 7E6gXf.
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creation unKi)v1
make u,I_p[`E
feature 0"#'Z>"
make is NJRk##Z
local _SY4Qs`d
io:BASIC_IO +iY .Y V
do QX-%<@
!!io ?#da4W
io.put_string("%N Hello, world!") {1Z8cV
end -- make LB1LQ0M
end -- class HELLO_WORLD hOG9
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