“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。 xh:I]('R
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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》。 rl7up
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以下是用不同语言写成的Hello World程序的几个例子: f$QkzWvr
Ada i[9yu-
with Ada.Text_Io; use Ada.Text_Io; p#jAEY p
procedure Hello is iS,l
begin xgMh@@e
Put_Line ("Hello, world!"); l#enbQ`-~
end Hello; peu9Bgs
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汇编语言 i<F7/p "-
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x86 CPU,DOS,TASM mP\V.^
MODEL SMALL .F8[;+
IDEAL vY_[@y
STACK 100H vN^.MR+<
V3ht:>c9qs
DATASEG 1v|-+p42
HW DB 'Hello, world!$' s>o#Ob@4'
)KE
CODESEG %\
i&g$
MOV AX, @data ^O*-|ecA
MOV DS, AX y@l&B+2ks
MOV DX, OFFSET HW :pdX
MOV AH, 09H OM0r*<D"!
INT 21H aGC3&c[Wx
MOV AX, 4C00H rs?Dn6:;B
INT 21H JrOxnxd^
END j yD3Sa3
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x86 CPU,GNU/Linux,NASM $,@}%NlHc
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). N-QS/*C.~
;Enter this into "hello.asm" then type: Qpv#&nfUi6
;"nasm -f elf hello.asm" B zS4:e<
;"ld hello.o -o hello" E;CM"Y*
;"./hello" _Z]l=5d
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section .data ;data section declaration <z\SKR[
msg db 'Hello World!',0AH ]TT >3"Dw7
len equ $-msg ;string length fYjmG[4
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section .text ;code section declaration TiI /I`A
global _start ;entry point (start of execution) l SdA7
_start: mov edx,len ;string length 8^}/T#l
mov ecx,msg ;string start {WV"]O8IV
mov ebx,1 ;file handle: stdout N_bgW QY
mov eax,4 ;sys_write Xd%qebK
int 80h ;kernel system call X3G593ts
:W0p36"
mov ebx,0 ;return value 12U]=
mov eax,1 ;sys_exit sMGo1pG(
int 80h ;kernel system call N_NN0
DWOf\[
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x86 CPU,Windows,MASM32 +"-l~`+<es
.386 u!|_bI3
.model flat,stdcall je^VJ&ac
option casemap:none syBpF:`-W
;Include 文件定义 1<'z)r4
include windows.inc 7he,(V
include user32.inc ^nNY|
*
includelib user32.lib ?@4Mt2Z\
include kernel32.inc AB/${RGf+
includelib kernel32.lib |K1S(m<F
;数据段 a6n@
.data XiTi3vCe
szCaption db 'A MessageBox!',0 nrKAK^
szText db 'Hello,world!',0 1"Oe*@`pV
;代码段 &Tt7VYJfIV
.code -+@N/d5
start: n#x_da-m]
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK g7]S
invoke ExitProcess,NULL pYQSn.`V~
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> #aL.E(%
end start pRV.\*:c
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BEGIN { print "Hello, world!" } w>j5oz}
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BASIC 'O)v@p "
传统版BASIC(例如GWBASIC): <@(\z
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E !5O
10 PRINT "Hello, world!" xF!IT"5D
20 END wA$7SWC
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或在提示符输入: ]Ik~TW&
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?"Hello, world!":END OU%"dmSDk
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现代版BASIC(例如Quick BASIC): VYb,Hmm>kC
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Print "Hello, world!" TNqL ')f
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以下的语句在Quick BASIC中同样有效: ivgX o'=
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? "Hello,world!" 8(4!x$,Z5
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Pr}
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BCPL =? !FO'zt"
GET "LIBHDR" (E0WZ$f}
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LET START () BE $V3If
$( <lFHmi$qt{
WRITES ("Hello, world!*N") esTL3 l{[
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{2 q"9Ox"
Befunge CrI<rD%'
"!dlrow olleH">v &'12,'8
, }Q: CZ
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Brainfuck m#BXxS#B<_
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< Ewz cB\m
+++++++++++++++.>.+++.------.--------.>+.>. 3\Xk)a_
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C ]zj#X\
#include <stdio.h> 17'd~-lE
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int main(void) eg*a Vb
{ X$;x2mz nM
printf("Hello, world!\n"); ]Y]]X[@
return 0; !QVhP+l'H
} ).jQ+XE'>
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C++ w%`S>+kX&
#include <iostream> 'yH
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int main() m<j;f
{ n#"G)+h3#
std::cout << "Hello, world!" << std::endl; !4cCq_
return 0; Hx+r9w
} CP9 Q|'oJ
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C++/CLI W 3/]
2"0
int main() ]+,L/P
{ U0-RG
System::Console::WriteLine("Hello, world!"); 2<UC^vZ
} 9 D.wW
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C# (C Sharp) FUSe!f
class HelloWorldApp nL^7t7mp
{ `%[m%Y9h
public static void Main() r
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{ <=|^\r
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System.Console.WriteLine("Hello, world!"); 1:<n(?5JI
} p}==aNZK
} lGahwn:
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COBOL j{FRD8]V
IDENTIFICATION DIVISION. 7)D[ }UXz
PROGRAM-ID. HELLO-WORLD. l$!ExXEZO;
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ENVIRONMENT DIVISION. fCu;n%
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DATA DIVISION. *?Wz/OJ0
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PROCEDURE DIVISION. 6miXaAA8
DISPLAY "Hello, world!". xr.;B`T0\'
STOP RUN. ;C =d(
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Common Lisp N:64Gko"K
(format t "Hello world!~%") >P(.yQ8&kL
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DOS批处理 _t]Q*i0p
@echo off jXmY8||w
echo "Hello, world!" r-S%gG}~E
v"
#8^q
XjzGtZ#6
Eiffel g3'dkS!
class HELLO_WORLD F&p42!"
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creation t^Bs3;E^
make roriNr/e
feature TPx0LDk%(
make is dL'oIBp
local SefF Ci%4
io:BASIC_IO B:i$
do J s33S)
!!io i0\]^F
io.put_string("%N Hello, world!") #(}{*dR
end -- make FDF DB
end -- class HELLO_WORLD 'Kmf6iK>[
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Erlang %t* 9sh
-module(hello). Q>X1 :Zn3
-export([hello_world/0]). pdN8hJ
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hello_world() -> io:fwrite("Hello, World!\n"). dw}ge,bBic
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Forth J7WNgl%
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." Hello, world!" CR zvnd@y{[
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evE:FiDm(j
Fortran r;(^]Soz
WRITE(*,10) OJydt; a
10 FORMAT('Hello, World!')
StNA(+rT
STOP &!:mL],
END 0%rE*h9+
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HTML 4Af7x6a;
<HTML> 7/]Ra
<HEAD> }`0=\cKqn
<TITLE> Hello World! </TITLE> k;Qm%B
</HEAD> b:O_PS5h
<BODY> :Eg4^,QX
<p>Hello World!</p> [70 _uq
</BODY> 5<KBMCn
</HTML> /i!/)]*-
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INTERCAL Hjs#p{t[
PLEASE DO ,1 <- #13 btC<>(kl&
DO ,1 SUB #1 <- #238 uu0t}3l
DO ,1 SUB #2 <- #112 M_$;"NS+}
DO ,1 SUB #3 <- #112 j~in%|^
DO ,1 SUB #4 <- #0
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DO ,1 SUB #5 <- #64 W`#E[g?]
DO ,1 SUB #6 <- #238 %,8
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DO ,1 SUB #7 <- #26 HD$r<bl
DO ,1 SUB #8 <- #248 m=iKu(2xRq
DO ,1 SUB #9 <- #168 W+V &