“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。 v'H\KR-;
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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》。 ~AbTbQ3
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以下是用不同语言写成的Hello World程序的几个例子: [Uw/;Kyh
Ada mDJN)CX
with Ada.Text_Io; use Ada.Text_Io; 1feS/l$
procedure Hello is `'
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begin + U];
Put_Line ("Hello, world!"); `U[s d*C"
end Hello; `oUuAL
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汇编语言 fKN&0N|^R
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x86 CPU,DOS,TASM 8#&axg?a
MODEL SMALL uw,p\:D&
IDEAL leSR2os
STACK 100H tjIT4
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DATASEG N
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HW DB 'Hello, world!$' cXY;Tw45
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CODESEG C_~hX G
MOV AX, @data #ovmX
MOV DS, AX |JD"iP:
MOV DX, OFFSET HW uO,9h0y0W
MOV AH, 09H 2y0J~P! I
INT 21H +>uiI4g
MOV AX, 4C00H 5i42o+'
INT 21H y$7vJl.uS/
END l9"T"9C{
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x86 CPU,GNU/Linux,NASM d@ ?++z
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). MY]<^/Q
;Enter this into "hello.asm" then type: s.p4+KJ
;"nasm -f elf hello.asm" bI_T\Eft
;"ld hello.o -o hello" th?w&;L
;"./hello" c6@7>PM
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section .data ;data section declaration AJ0
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msg db 'Hello World!',0AH ~5Cid)Q}@o
len equ $-msg ;string length e2X\ll
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section .text ;code section declaration Tt.#O~2:9
global _start ;entry point (start of execution) yDil
_start: mov edx,len ;string length 'fGB#uBt
mov ecx,msg ;string start jrl'?`O
mov ebx,1 ;file handle: stdout qZS]eQW.
mov eax,4 ;sys_write q|}%6ztv-
int 80h ;kernel system call 5>e#SW
1#D &cx6
mov ebx,0 ;return value 1j!LK-
mov eax,1 ;sys_exit fy6<KEea
int 80h ;kernel system call s6k@W T?"^
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x86 CPU,Windows,MASM32 /~O>He
.386 @X?7a]+;8
.model flat,stdcall `Q@w*ta)
option casemap:none `Nnaw+<]
;Include 文件定义 .yF@Ow
include windows.inc EDA%qNd]j
include user32.inc 3tjF4C>h|
includelib user32.lib vR)f'+_Nz
include kernel32.inc l
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includelib kernel32.lib J2BCaAwEP,
;数据段 Mxmo}tt
.data 2d# 3LnO
szCaption db 'A MessageBox!',0 c;13V(Djy
szText db 'Hello,world!',0 %tvP\(]h
;代码段 W0 n?S
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.code u{'|/g&
start: Z0'&@P$
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK JH|]B|3
invoke ExitProcess,NULL 6L!/#d0
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> x_+-TC4IXn
end start P2!+ZJ&
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BEGIN { print "Hello, world!" } 0Xw$l3@N^
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BASIC ]i:_^z)R
传统版BASIC(例如GWBASIC): E~y(@72)
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10 PRINT "Hello, world!" )
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20 END )vsX (/WU
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或在提示符输入: II'"Nkxd
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?"Hello, world!":END
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现代版BASIC(例如Quick BASIC): p>l:^-N;f
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Print "Hello, world!" {ew;
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以下的语句在Quick BASIC中同样有效: #I"s{*
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? "Hello,world!" 2j;9USZ
p
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BCPL SaIY-PC
GET "LIBHDR" |E9'ii&?B
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LET START () BE 6Vj=SYK
$( %6W%-`
WRITES ("Hello, world!*N") lv>^P>S(O
$) we/sv9v}n
WS ^,@>A
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Befunge T jE'X2/
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, *>h|<|T'
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Brainfuck IG Ax+3V
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< }a%1$>sj
+++++++++++++++.>.+++.------.--------.>+.>. GO)5R,
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#include <stdio.h> @h9QfJ_f
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int main(void) 4a=QTq0p
{ *M^<oG
printf("Hello, world!\n"); brX[-
return 0; X;1yQ|su
} 3$_JNF`
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C++ (6Ciqf8
#include <iostream> I^Dm 3yz
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int main() ?>Ngsp>-P
{ 2?{'(iay
std::cout << "Hello, world!" << std::endl; nTl2F1(sV7
return 0; e%lxRN"b
} ;0U*N &
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C++/CLI r
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int main() /9=r.Vxh
{ oY+p;&H
System::Console::WriteLine("Hello, world!"); N%?R(
} _X|prIOb=
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C# (C Sharp) :(\JY?+w
class HelloWorldApp ?N(<w?Gat
{ .1}1e;f-
public static void Main() 84!Hd.H
{ d%UzQ*s
System.Console.WriteLine("Hello, world!"); Bf.iRh0Q5
} "BVp37m;?
} ve+bR
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COBOL 7=D,D+f
IDENTIFICATION DIVISION. ,5x#o
PROGRAM-ID. HELLO-WORLD. S@'%dN6e
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ENVIRONMENT DIVISION. 5DDSo0E
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DATA DIVISION. tY>Zy1hlI
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PROCEDURE DIVISION. qX*xQA|ak,
DISPLAY "Hello, world!". wTD}c1J(
STOP RUN. RRXp9{x`
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Common Lisp ?5jLN&A3 G
(format t "Hello world!~%") Se_]=>WI
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DOS批处理 Vef!5]t5
@echo off 2kt0Rxg
echo "Hello, world!" DJ DQH \&
#N"u 0
lWecxD$
Eiffel "%)g^Atp>
class HELLO_WORLD KIi:5Y
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creation t>AOF\
make =7JSJ98
feature WQ}wQ:]
make is m^0vux
local F(#?-MCs
io:BASIC_IO $btu=_|f
do cS'{h
!!io EK5$z>k>m
io.put_string("%N Hello, world!") W7Y@]QMX
end -- make B;?)X&n|X
end -- class HELLO_WORLD /y$ Fw9R;
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Erlang vJaWHC$q
-module(hello). h=0a9vIXF
-export([hello_world/0]). i%JJ+9N
Ix6\5}.c 9
hello_world() -> io:fwrite("Hello, World!\n"). cFt&E