“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。 F
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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》。 ?FA} ;?v
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以下是用不同语言写成的Hello World程序的几个例子: zL+jlUkE
Ada zw_Xh~4"b
with Ada.Text_Io; use Ada.Text_Io; &) T5V
procedure Hello is Xt_8=Q
begin s%1 O}X$c
Put_Line ("Hello, world!"); 9B{,q6
end Hello;
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汇编语言 @aAB#,
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x86 CPU,DOS,TASM W_Z%CBjcT
MODEL SMALL TMpV.iH
IDEAL f(6`5/C
STACK 100H 7;2j^qPr
yT.h[yv"w
DATASEG wqk D
HW DB 'Hello, world!$' iqreIMWz
sf<S#;aYqn
CODESEG YC8wo1;Y!
MOV AX, @data >B!E 6ah
MOV DS, AX LP-~;
MOV DX, OFFSET HW U0 nSI
MOV AH, 09H 3LN+gXmU
INT 21H 'y[74?1
MOV AX, 4C00H opU=49b
INT 21H sEkfmB2J/
END PV$)k>H-
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x86 CPU,GNU/Linux,NASM O]3$$uI=QE
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). #.L9/b(
;Enter this into "hello.asm" then type: +pXYBwH
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;"nasm -f elf hello.asm" "\cDSiD
;"ld hello.o -o hello" %A64AJZ
;"./hello" 1y'8bt~7Pf
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section .data ;data section declaration h;cl+c|B
msg db 'Hello World!',0AH QxS]6hA
len equ $-msg ;string length VRU"2mQ.P6
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section .text ;code section declaration i^T@jg+K
global _start ;entry point (start of execution) u_H=Xm)9
_start: mov edx,len ;string length 9^;Cz>6s
mov ecx,msg ;string start )l?1dR:sP
mov ebx,1 ;file handle: stdout qW+'#Jh@TV
mov eax,4 ;sys_write D+#OB|&Dn
int 80h ;kernel system call E+z),"QA
/JsA[}.6
mov ebx,0 ;return value "o_s=^U
mov eax,1 ;sys_exit I\e/
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int 80h ;kernel system call YYNh|
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x86 CPU,Windows,MASM32 k_;g-r,
.386 HQ /D )D
.model flat,stdcall jkAWRpOc)
option casemap:none +MZsL7%
;Include 文件定义 'h}(> %
include windows.inc )7]la/0
include user32.inc t57MKDn
includelib user32.lib CWBlDz
include kernel32.inc r&%TKm^/
includelib kernel32.lib CP0;<}k
;数据段 Cv[_N%3[
.data 21k,{FB'?
szCaption db 'A MessageBox!',0 W&~\@j]!D
szText db 'Hello,world!',0 Es<& 6
;代码段 cN% r\
.code |j}D2q=
start: ZLDO&}
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK kB`
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invoke ExitProcess,NULL -7Bg5{FA
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> []lMv
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end start bv^wE,+?o
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BEGIN { print "Hello, world!" } aD^jlt
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BASIC <
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传统版BASIC(例如GWBASIC): |.*nq
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10 PRINT "Hello, world!" _Z>ny&
20 END BOflhoUX
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或在提示符输入: dVMduo
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?"Hello, world!":END '4Drs}j5
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现代版BASIC(例如Quick BASIC): ~9y/MR
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Print "Hello, world!" 1B#iJZ}
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以下的语句在Quick BASIC中同样有效: *(s0X[-
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? "Hello,world!" -x{@D{Q%
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BCPL G#Kw6
GET "LIBHDR" D GL=\
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LET START () BE +[ng99p
$( +B[XTn,Cru
WRITES ("Hello, world!*N") \sAkKPI
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Befunge SdF+b+P]
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Brainfuck PWeWz(]0Z4
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< d}aMdIF!e
+++++++++++++++.>.+++.------.--------.>+.>. LSR0yCU
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C iSX HMp4V
#include <stdio.h> R, #szTu
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int main(void) c'XSs
{ Sz:PeUr9h
printf("Hello, world!\n"); /U,(u9bq
return 0; yf[1?{iVo
} )gz]F_
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C++ 9@?|rje9
#include <iostream> JC`;hY
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int main() L{GlDoFk
{ mG1!~}[
std::cout << "Hello, world!" << std::endl; l*(L"]
return 0; z}iz~WZ
} 03AQB;.
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C++/CLI #S]O|$&*
int main() 8QMMKOui\
{ $2Awp@j
System::Console::WriteLine("Hello, world!"); f'MRC
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} m;nH
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C# (C Sharp) Lctp=X4
class HelloWorldApp 2"k|IHs1
{ {t4':{Y+
public static void Main() $m-C6xC/
{ K47.zu
System.Console.WriteLine("Hello, world!"); xb"e'Zh
} P8H2v_)X&
} ,$aqF<+;
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COBOL d|`8\fq
IDENTIFICATION DIVISION. Pf;RJeD
PROGRAM-ID. HELLO-WORLD. !]9qQ7+R%
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ENVIRONMENT DIVISION. ONZ(0H{ 1$
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DATA DIVISION. 9xK#(M
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PROCEDURE DIVISION. RQu[FZT,
DISPLAY "Hello, world!". t8; nP[`
STOP RUN. DjiI*HLNR
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Common Lisp $VP\Ac,!
(format t "Hello world!~%") Ji1# >;&
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DOS批处理 =s*4y$%I
@echo off UZ6y3%G3^
echo "Hello, world!" kIe)ocJg
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Eiffel rmFcSolt,f
class HELLO_WORLD ;TK$?hrv*1
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creation .eorwj]yb
make Q ~n%c7
feature )nq(XM7
make is H(O|y2
local
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io:BASIC_IO 3<[q>7X
do $" =3e]<
!!io _EP~PW#J
io.put_string("%N Hello, world!")
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end -- make ??LE0i
end -- class HELLO_WORLD *+00
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Erlang 8wEJyAu2
-module(hello). T[ g(S0dz
-export([hello_world/0]). e?
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hello_world() -> io:fwrite("Hello, World!\n"). (h[.
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Forth }I#_H
." Hello, world!" CR 9[
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Fortran V^><
=DNE
WRITE(*,10) YM.
10 FORMAT('Hello, World!') uu>R)iTQ%S
STOP xK5~9StP
END znIS2{p/`
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HTML F ^m;xy
<HTML> 6uk}4bdvq
<HEAD> m& D#5C
<TITLE> Hello World! </TITLE> 23a:q{R
</HEAD> ~0}d=d5g
<BODY> LW9F%?e!>
<p>Hello World!</p> $U)nrni
</BODY> i.KRw6
</HTML> )M"xCO3a
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INTERCAL f9)0OHa
PLEASE DO ,1 <- #13 1qm*#4x
DO ,1 SUB #1 <- #238 aB`jFp-
DO ,1 SUB #2 <- #112 {.e^1qE
DO ,1 SUB #3 <- #112 O]j<