“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。 &%C4Ugo
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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》。 NCS!:d:Ry
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以下是用不同语言写成的Hello World程序的几个例子: mZvG|P$}
Ada 6[dur'x
with Ada.Text_Io; use Ada.Text_Io; EeQ5vqU
procedure Hello is o'V%EQ
begin g /+oZU
Put_Line ("Hello, world!"); 5,KWprb
end Hello; (Xxn\*S
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汇编语言 NucM+r1P
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x86 CPU,DOS,TASM ]]iPEm"@
MODEL SMALL 3smM,fi
IDEAL g@v
s*xE
STACK 100H Zm TDQ`Ix
hkL5HzWn
DATASEG I4_d[O9
HW DB 'Hello, world!$' )9j06(<A
pK&I^r
CODESEG c|~6Ie
MOV AX, @data U bz"rCjq
MOV DS, AX &<x@1,
MOV DX, OFFSET HW m~l
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MOV AH, 09H L\aBc}
INT 21H &XLD S=j
MOV AX, 4C00H +Ezgn/bS&
INT 21H OyG"1F
END 0lk;F
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x86 CPU,GNU/Linux,NASM /\d$/~BFi
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). =H5\$&xj4.
;Enter this into "hello.asm" then type: LJzH"K[Gg6
;"nasm -f elf hello.asm" vP-M,4c
;"ld hello.o -o hello" &~DTZgY
;"./hello" m>&HuHf
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section .data ;data section declaration tx7~SUr
msg db 'Hello World!',0AH `cB_.&
len equ $-msg ;string length $So%d9k
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section .text ;code section declaration S5=Udd"
global _start ;entry point (start of execution) _sHK*&W{CT
_start: mov edx,len ;string length d}I(`%%)
mov ecx,msg ;string start ,5k-.Md>2*
mov ebx,1 ;file handle: stdout p#8W#t$
mov eax,4 ;sys_write /i|z.nNO
int 80h ;kernel system call N1EezC'^
=H]F`[B=
mov ebx,0 ;return value nY?
mov eax,1 ;sys_exit 9L eNe}9v
int 80h ;kernel system call %kI}
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x86 CPU,Windows,MASM32 3HV%4nZLf
.386 *tQk;'/A]
.model flat,stdcall > 6CV4 L
option casemap:none x ,/TXTZ6
;Include 文件定义 h+UnZfm
include windows.inc m7]hJ,0
include user32.inc JHV)ZOO
includelib user32.lib Sq]pQ8
include kernel32.inc DtCEm(b0
includelib kernel32.lib `|e!Kq?#Q
;数据段 ~.tvrxg
.data eBW=^B"y+
szCaption db 'A MessageBox!',0 4)-)# `K
szText db 'Hello,world!',0 T8J4C=?/
;代码段 - Xupq/[,
.code &vUq}r%P
start: 1hQN8!: <
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK 70W"G
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invoke ExitProcess,NULL Jn}n*t3
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> =C7
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end start lPq\=V
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AWK .QWhK|(.!
BEGIN { print "Hello, world!" } 'VnwG
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BASIC mX# "+X|
传统版BASIC(例如GWBASIC): L&2u[ml
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10 PRINT "Hello, world!" f4t.f*#
20 END AHh#Fx+K
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或在提示符输入: #*$p-I=
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?"Hello, world!":END _GaJXWMbk
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现代版BASIC(例如Quick BASIC): V^fV7hw<
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Print "Hello, world!" }p3b#fAr
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以下的语句在Quick BASIC中同样有效: (|h:h(C
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? "Hello,world!" 4YA./j%'
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:b#%C
pR
BCPL S3\jcgrS
GET "LIBHDR" 5D`26dB2
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LET START () BE :h5J r8
$( D!3{gV#
WRITES ("Hello, world!*N") FvImX
$) gQVBA %
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;Rnhe_A.
Befunge bH9Le
"!dlrow olleH">v POd/+e9d
, \_ow9vU
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:F(9"L
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Brainfuck d]B=*7]
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< &d^=siL
+++++++++++++++.>.+++.------.--------.>+.>. &a #GXf
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C f\o
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#include <stdio.h> #+jUhxq
;;#nV$
int main(void) Jq1 n0O
{ c ~Kc7}I
printf("Hello, world!\n"); $G";2(-k
return 0; :t$A8+A+0
} 3E|;r
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C++ rK=6]j(K
#include <iostream> ;93KG4a
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int main() .h8M
{ d6b.zP
std::cout << "Hello, world!" << std::endl; TVkcDS
return 0; *\q8BZ
} Slx2z%'>
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C++/CLI ntH T
int main() "$@,n7k
{ *{[d%B<lp
System::Console::WriteLine("Hello, world!"); ~ x`7)3
} eP |)SU
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C# (C Sharp) 9ECS,r*B
class HelloWorldApp ,cQA*;6
{ G8P+A1
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public static void Main() ~e^)q>Lb7(
{ 3+ asP&n
System.Console.WriteLine("Hello, world!"); 2oB?Dn
} BE4\U_]a3
} 3^ ~Zj95M
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COBOL ZR
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IDENTIFICATION DIVISION. ?`i|"y#
PROGRAM-ID. HELLO-WORLD. B1,?{Ur
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ENVIRONMENT DIVISION. 1ypjyu
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DATA DIVISION. DpNX66O
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PROCEDURE DIVISION. sL
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DISPLAY "Hello, world!". c}cG<F
STOP RUN. S)Mby
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Common Lisp [oJ& J>U'
(format t "Hello world!~%") )|:8zDuJ
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DOS批处理 ]:!8 s\#
@echo off )u
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echo "Hello, world!" tnJ`D4
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Eiffel T7s+9CE
class HELLO_WORLD %|bN@@
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creation BiE$mM
make K)N)IZ1q
feature 8z0Hx
make is kp.|gzA6
local J]\s*,C&
io:BASIC_IO 13\Sh
do Sn0Xl3yr
!!io x@Sra@
io.put_string("%N Hello, world!") eoC<a"bJ>
end -- make Ho>p ^p
end -- class HELLO_WORLD sq48#5Tc^r
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Erlang '&/(oJ;O~
-module(hello). <BQ%8}
-export([hello_world/0]). L#[HnsLp_
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hello_world() -> io:fwrite("Hello, World!\n"). EJv! tyJ\[
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Forth F61+n!%8
." Hello, world!" CR ~;TV74~rr
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Fortran 20n%o&kG]8
WRITE(*,10) BzN/6VEw
10 FORMAT('Hello, World!') p$B)^S%0i
STOP d"z *Nb
END W&Y4Dq^
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HTML n})
<HTML> TeOFAIU
<HEAD> -DA;KWYS
<TITLE> Hello World! </TITLE> \%Pma8&d
</HEAD> >qr=l,Hi
<BODY> %`bLmfm
<p>Hello World!</p> [ e$]pN%
</BODY> B[C7G7<B
</HTML>
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