“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。 }w=|"a|,
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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》。 Ut%{pc 7^F
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以下是用不同语言写成的Hello World程序的几个例子: 9G1ZW=83
Ada z3^gufOkQ
with Ada.Text_Io; use Ada.Text_Io; =BD|uIR
procedure Hello is &G-dxET]
begin *>GRU8_}
Put_Line ("Hello, world!"); B%x?VOdBE
end Hello; t@2MEo
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汇编语言 7OPRf9+o
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x86 CPU,DOS,TASM Lm^vS u
MODEL SMALL c?Zi/7
IDEAL sVlQ5M oo(
STACK 100H u3cl7~- yW
qus%?B{b}
DATASEG X2 <fS~m
HW DB 'Hello, world!$' g/!tp;e
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CODESEG NwKj@ Jos
MOV AX, @data 6ZXRb
MOV DS, AX K,bX<~e5
MOV DX, OFFSET HW U@}r?!)"f
MOV AH, 09H T0o0_R
INT 21H +wGvYr
MOV AX, 4C00H 7 $Cv=8
INT 21H ]<;y_
END (AG((eV
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x86 CPU,GNU/Linux,NASM T#}"?A|
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). ACEVd! q
;Enter this into "hello.asm" then type: Eb&=$4c=
;"nasm -f elf hello.asm" Eh *u6K)Z
;"ld hello.o -o hello" |/u,6`
;"./hello" Gg^gK*D
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section .data ;data section declaration "JgwL_2
msg db 'Hello World!',0AH c&g*nDuDj
len equ $-msg ;string length 7Xh
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section .text ;code section declaration 1,n\Osd
global _start ;entry point (start of execution) ~T=a]V
_start: mov edx,len ;string length V|2[>\Cv
mov ecx,msg ;string start 5hDm[*83
mov ebx,1 ;file handle: stdout Q^'xVS_.
mov eax,4 ;sys_write +[V.yY/t|>
int 80h ;kernel system call "!#KQ''R
e=ry_@7
mov ebx,0 ;return value Z>.('
mov eax,1 ;sys_exit $L72%T
int 80h ;kernel system call .p78
\T
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x86 CPU,Windows,MASM32 -{p~sRc&
.386 5QG?*Z~?7
.model flat,stdcall A ?[Wfq|
option casemap:none C)&BtiUN/
;Include 文件定义 :>3?|Z"Aj
include windows.inc *3(mNpi{_
include user32.inc @,q <CF@Y
includelib user32.lib N3\vd_D(
include kernel32.inc .6pVt_f0/
includelib kernel32.lib 50Ov>(f@7
;数据段 (J.U{N v
.data kq>I?wg
szCaption db 'A MessageBox!',0 }u;`k'J@
szText db 'Hello,world!',0 XJA];9^
;代码段 )D7/[zb^
.code -]Aqt/w"l
start: CS;4 ysNf
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK 8)YDUE%VH
invoke ExitProcess,NULL $OaxetPH
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> O0sLcuT$
end start E_#?;l>
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AWK Pk`3sfz
BEGIN { print "Hello, world!" } UYhxgPGsj
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BASIC tcJN`N
传统版BASIC(例如GWBASIC): rw[Ioyr-
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10 PRINT "Hello, world!" e. R9:
20 END 1H8/b D
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或在提示符输入: )h0b}HMW)
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?"Hello, world!":END /])P{"v$^
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现代版BASIC(例如Quick BASIC): )Cd.1X8
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Print "Hello, world!" H'&[kgnQ@
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以下的语句在Quick BASIC中同样有效: ]l,,en5V
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? "Hello,world!" _Sl3)
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BCPL -L!lJ
GET "LIBHDR" ;*WG9Y(W
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LET START () BE \J(kM,ZJ
$( S:1g(f*85
WRITES ("Hello, world!*N") "egpc*|]
$) y2=yh30L0E
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Befunge e0hY
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<LN7+7}
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Brainfuck ^9kx3Pw?8
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< t(jE9t|2e6
+++++++++++++++.>.+++.------.--------.>+.>. U>DCra;
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C zjOOEvi
#include <stdio.h> B<0Kl.V
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int main(void) m"QDc[^Ge
{ lc3Gu78 A/
printf("Hello, world!\n"); _n_()at)
return 0; <>728;/C
} :>U+HQll
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C++ W#=,FZT
#include <iostream> X0R EC%
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int main() Np aS2q-d
{ 5DVYHN9c|
std::cout << "Hello, world!" << std::endl; !-%XrU8o3
return 0; xF@&wg
} 'C]Yh."u
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C++/CLI =E<H_cUS
int main()
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{ tym:C7v%~
System::Console::WriteLine("Hello, world!"); -Jw4z#/-
} 1GqSY|FSGp
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C# (C Sharp) gKQV99
class HelloWorldApp aU^6FI
{ /;Hr{f jl{
public static void Main() ixSr*+
{ Gx6%Z$2n
System.Console.WriteLine("Hello, world!"); p4*L}Q
} .Z
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} (zsv!U
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~> Q9
COBOL &lLfVa-l
IDENTIFICATION DIVISION. P_w4
DU
PROGRAM-ID. HELLO-WORLD. bd~m'cob>
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ENVIRONMENT DIVISION. fBj)HoHQW
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DATA DIVISION. 1l"2 ~k
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PROCEDURE DIVISION. bWAa:
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DISPLAY "Hello, world!". ?5J#
STOP RUN. %l!?d`?
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Common Lisp )38%E;T{X
(format t "Hello world!~%") h]s~w
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DOS批处理 .JXEw%I@
@echo off dN)8r
echo "Hello, world!" &h5Y_no GX
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Eiffel
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class HELLO_WORLD G<n75!
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creation e;"J,7@
make Y?NL|cW4
feature \&hq$
make is YWl#!"-
local <1l%|
io:BASIC_IO Sv{n?BYq
do ,3Q~X$f
!!io A-T-4I
io.put_string("%N Hello, world!") m0TV i] v
end -- make u9OY
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end -- class HELLO_WORLD ?J2A1iuq3
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Erlang Fm0d0j
-module(hello). '7sf)0\:<p
-export([hello_world/0]). /)sP, 2/
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hello_world() -> io:fwrite("Hello, World!\n"). ]yf?i350
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Forth k8+J7(_c
." Hello, world!" CR I]v2-rB&-
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Fortran g2|Myz)
WRITE(*,10) U]sAYp^$
10 FORMAT('Hello, World!') 0vm> *M*p
STOP wS*r<zj
END ^[xcfTN
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HTML u]IbTJ'
<HTML> <b zzbR[F
<HEAD> Q%JI-&K
<TITLE> Hello World! </TITLE> CLrX!JV>
</HEAD> Ds">eNq
<BODY> -+rzc&h
<p>Hello World!</p> mQ:{>`
</BODY> qgrJi +WZ
</HTML> f,cd=vGj
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