“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。 p0WUF\"
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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》。 [gpO?'~
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以下是用不同语言写成的Hello World程序的几个例子: ^?Mp(o
Ada @lF?+/=$
with Ada.Text_Io; use Ada.Text_Io; t^KQ*8clG
procedure Hello is Ku%tM7 ad
begin Ny^f'tsA
Put_Line ("Hello, world!"); }%8ZN :
end Hello; L2,2Sn*4i
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汇编语言 c)LG+K
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x86 CPU,DOS,TASM 9xO@_pkX
MODEL SMALL M2 |!,2
IDEAL H7GI`3o
STACK 100H ZX` \so,&,
DH
yv^
DATASEG 2t9UJu4
HW DB 'Hello, world!$' $Yt|XT+!&
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CODESEG W`_JERo
MOV AX, @data S)rr
MOV DS, AX 60vmjm Xl
MOV DX, OFFSET HW \1jThJn
MOV AH, 09H yAryw{(
INT 21H H oABo:
MOV AX, 4C00H ?UAuUFueA
INT 21H C[<}eD4bV
END {KNaJ/:>W
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x86 CPU,GNU/Linux,NASM hNM8H
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). U?sHh2*
;Enter this into "hello.asm" then type: Tj#S')s8
;"nasm -f elf hello.asm" < j:\;mi;
;"ld hello.o -o hello" 12z!{k7N
;"./hello" oj -
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section .data ;data section declaration n2bhCd]j<b
msg db 'Hello World!',0AH iR nj N
len equ $-msg ;string length 46}U+>
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section .text ;code section declaration BV
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global _start ;entry point (start of execution) Q-'j131[
_start: mov edx,len ;string length J)>DsQ+Cj
mov ecx,msg ;string start SjB"#E)
mov ebx,1 ;file handle: stdout \jwG*a
mov eax,4 ;sys_write Jg;[k
int 80h ;kernel system call a]u.Uqyx2w
q4[}b-fF
mov ebx,0 ;return value UeO/<ml3>J
mov eax,1 ;sys_exit VKDOM0{V
int 80h ;kernel system call P}}G9^
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\{ @m
x86 CPU,Windows,MASM32 k_,7#:+
.386 QQS*r}>
.model flat,stdcall =G:Krc8w@
option casemap:none `/PBZnj
;Include 文件定义 ;[}OZt
include windows.inc f%,S::%Ea
include user32.inc D<6$@ZJ
includelib user32.lib reN\|?0{
include kernel32.inc Xe%J{
includelib kernel32.lib (Lgea
;数据段 v:P]o9Oj8
.data +d6onO{8
szCaption db 'A MessageBox!',0 1 %P-X!
szText db 'Hello,world!',0 {Nl?
;代码段 [t?tLUg|6
.code "Xv} l@
start: 9 8|sWI3B
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK o1ZVEvp
invoke ExitProcess,NULL %^@l5h.lqB
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> ^YLC {V
end start Y1-dpML
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AWK 1?Y>Xz
BEGIN { print "Hello, world!" } )XDBK*!
YRlf U5
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BASIC +>#SNZ[
传统版BASIC(例如GWBASIC): 2T&MVl!%
2R&\qZ<
10 PRINT "Hello, world!" 7#R)+
20 END |#2WN-
{ LvD\4h"
或在提示符输入: N:<$]x>
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?"Hello, world!":END 3J#LxYK
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现代版BASIC(例如Quick BASIC): 1,wcf,
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Print "Hello, world!" ^aSb~lce
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以下的语句在Quick BASIC中同样有效: 9>~pA]j%
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? "Hello,world!" `j>5W<5q\
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BCPL ;;,7Jon2
GET "LIBHDR" 9-;-jnDy
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LET START () BE dEJqgp}\p
$( {$^'oRk
WRITES ("Hello, world!*N") ?P'$Vxl
$) <l<O2 l
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Befunge f!x9%
"!dlrow olleH">v 7l53&,s
, L!cOg8Z
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Brainfuck <,M"kF:
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+++++++++++++++.>.+++.------.--------.>+.>. 1CB&z@
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C v&d1ACctJ
#include <stdio.h> 5%I3eL%s
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int main(void) .?45:Ey~g
{ QOB^U-cW
printf("Hello, world!\n"); NIs 7v
return 0; Mh)?A/e
} D~C'1C&W
OS z71;j
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C++ uV5uZ
#include <iostream> <8:h%%$?
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int main() ' h7Faj
{ QF>T)1&J[7
std::cout << "Hello, world!" << std::endl; &*v\t\]
return 0; &en.
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} O&l4/RtQ\)
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C++/CLI ["3dr@T9Z
int main() &&&-P\3
{ 4,)9@-|0R
System::Console::WriteLine("Hello, world!"); 1 $&@wG
} L_Ok?9$
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C# (C Sharp) u}5CzV `
class HelloWorldApp {,%&}kd>
{ lb_N"90p
public static void Main() OH
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{ i\sBey ND"
System.Console.WriteLine("Hello, world!"); Af _4Z]F
} 4mvR]:G
} E.K^v/dNdq
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COBOL 83vMj$P
IDENTIFICATION DIVISION. `dvg5qQ
PROGRAM-ID. HELLO-WORLD. 3}|[<^$
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ENVIRONMENT DIVISION. Y^+x<
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DATA DIVISION. 2z-Nw <bA
Q4u.v,sE
PROCEDURE DIVISION. ?AyxRbk
DISPLAY "Hello, world!". d>p' A_
STOP RUN. `s7pM
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DB|1Sqjsn
Common Lisp ^ptybVo
(format t "Hello world!~%") JN
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iHPsRq!
DOS批处理 dxX`\{E
@echo off ]hS:0QE
echo "Hello, world!" m4/qxm"Dx:
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q
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Eiffel aKj|gwo!
class HELLO_WORLD u9"=t
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creation h&'|^;FM
make l'"nU6B&
feature
>Z!!` 0{
make is P73GH
local b?}mQ!
io:BASIC_IO 99=~vNn
do NH/A`Wm
!!io Tx.N#,T|
io.put_string("%N Hello, world!") }t^wa\
end -- make u$d[&|`>_
end -- class HELLO_WORLD <\#'o}
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Erlang G0
)[(s
-module(hello). V?Jy
-export([hello_world/0]). $S#Z>d*1!
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hello_world() -> io:fwrite("Hello, World!\n"). \ptO4E
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Forth tW UI?\
." Hello, world!" CR <wSJK
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V#ELn[k
Fortran &Gt{9#
WRITE(*,10) 5&