“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。 AQV3ZVP
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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》。 {(q Un
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以下是用不同语言写成的Hello World程序的几个例子: )?xt=9Lh
Ada F"F(s!
with Ada.Text_Io; use Ada.Text_Io; /Z@.;M
procedure Hello is <QkfvK]Q
begin #-f^;=7
Put_Line ("Hello, world!"); 5-3gsy/Mo
end Hello; ^7''x,I
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x86 CPU,DOS,TASM $I/p 6
MODEL SMALL Y$Ke{6 4
IDEAL /vV 0$vg
STACK 100H .Lp-'!i
e=R}
4`
DATASEG dog,vUu
HW DB 'Hello, world!$' 7,4x7!
Rd$<R
CODESEG <'B^z0I,
MOV AX, @data Bf}_ Jw-=
MOV DS, AX x!jhWX
MOV DX, OFFSET HW ~k%\ LZ3s
MOV AH, 09H )~n}ieS
INT 21H ' FK"-)s
MOV AX, 4C00H Wm,,OioK
INT 21H fE:2MW!)*
END 950b9Vn&
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x86 CPU,GNU/Linux,NASM =@z"k'Vl`
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). eo8 0L
;Enter this into "hello.asm" then type: (BGipX4
;"nasm -f elf hello.asm" w}i.$Qt
;"ld hello.o -o hello" >6dgf`U
;"./hello" aF=VJ+5
o MAK[$k;
section .data ;data section declaration =ht@7z8QM
msg db 'Hello World!',0AH EAkP[au.
len equ $-msg ;string length L!G3u/
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section .text ;code section declaration b2Hpuej
global _start ;entry point (start of execution) 5 9vGLN!L
_start: mov edx,len ;string length EGt)tI&
mov ecx,msg ;string start r__M1
!3
mov ebx,1 ;file handle: stdout )/JC.d#
mov eax,4 ;sys_write x'qgpG}?]
int 80h ;kernel system call Txh;r.1e
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mov ebx,0 ;return value 0d2%CsMS"D
mov eax,1 ;sys_exit ZZ(@:F
int 80h ;kernel system call ;gyE5n-{
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WToAT;d2h
x86 CPU,Windows,MASM32 8\9EDgT
.386 ;D1IhDC
.model flat,stdcall kYAvzuGRb
option casemap:none {V8Pn2mlo
;Include 文件定义 1dcy+ !>
include windows.inc 9& j]
include user32.inc t/Fe"T[,V
includelib user32.lib Exr7vL
include kernel32.inc >`:+d'Jv0
includelib kernel32.lib +*V;
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;数据段 qAS^5|(b[
.data E@FenCF
szCaption db 'A MessageBox!',0 Q
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szText db 'Hello,world!',0 J.nq[/Q=
;代码段 pA'A<|)K0
.code {/<&
start: Z-@}~#E
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK Ub,unU
invoke ExitProcess,NULL 5qy}~dQ
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> oK6lCGM5
end start 7,TWCVap
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BEGIN { print "Hello, world!" } <Xx\F56zp
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BASIC ]aNnY?qW5
传统版BASIC(例如GWBASIC): i7V~LO:gq
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10 PRINT "Hello, world!" +pvJ?"J
20 END ozLJ#eOE9
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或在提示符输入: E,7~kd~y`
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?"Hello, world!":END "ux]kfoT
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现代版BASIC(例如Quick BASIC): de9l;zF
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Print "Hello, world!" Bq@wS\W>b}
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以下的语句在Quick BASIC中同样有效: -G#k/Rz6
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? "Hello,world!" PU5mz.&0'
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% VpBB
BCPL yPYJc
GET "LIBHDR" aG_ON0g
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LET START () BE od*Z$Hb>'
$( j#t8Krd] "
WRITES ("Hello, world!*N") Xe;(y "pR
$) wg<|@z5
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Befunge _`i%9Ad.4
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#include <stdio.h> @[tV_Z%,b
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int main(void) AAq=,=:R<
{ 9<h]OXv
printf("Hello, world!\n"); nVn|$ "r
return 0; 6w"( y~c1
}
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C++ r<X 4ER
#include <iostream> guOSO@
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int main() y(nsyA
{ p/k<wCm6
std::cout << "Hello, world!" << std::endl; mw(c[.*%
return 0; uR:=V9O
} n(1wdl Ep
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C++/CLI g+ }s:9
int main() o)#q9Vk%b
{ (7;J"2M
System::Console::WriteLine("Hello, world!"); 7"F|6JP"$c
} XpgV09.EE
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C# (C Sharp) cZe'!CQS
class HelloWorldApp @)vy'qP d
{ T)(e!Xz
public static void Main() @P_C%}(<
{ @A2/@]H Bm
System.Console.WriteLine("Hello, world!"); )WVItqQKV
}
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} F?b'L
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COBOL 2y+70(E1
IDENTIFICATION DIVISION. _{e&@d
PROGRAM-ID. HELLO-WORLD. qRPc%"
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ENVIRONMENT DIVISION. >*`>0Q4y
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DATA DIVISION. 3>Q@r>c
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PROCEDURE DIVISION. xd^&_P$=
DISPLAY "Hello, world!". q%-&[%l
STOP RUN. .Vo"AuC}
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Common Lisp bQwdgc),s{
(format t "Hello world!~%") "xvtqi,R
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DOS批处理 ':l"mkd+`
@echo off K2cq97k,d
echo "Hello, world!" 3 ppuQQ
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Eiffel \Okc5;kB2
class HELLO_WORLD f.||PH
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creation LZ~2=Y<
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make U;\S(s}
feature RcgRaQ2^
make is 4P|$LkI
local )ZHc$+fU
io:BASIC_IO 5 U%MoH
do R6`*4zS
!!io QhsMd-v
io.put_string("%N Hello, world!") 6sPk:5
end -- make vQUZVq5M
end -- class HELLO_WORLD ;a|`s
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Erlang 2B-.}OJ
-module(hello). Pg/T^n&
-export([hello_world/0]). *z q .C
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hello_world() -> io:fwrite("Hello, World!\n"). & g:%*>7P
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Forth EY kj@
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." Hello, world!" CR :cy>c2
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Fortran GM](=|F
WRITE(*,10) F?z<xL@
10 FORMAT('Hello, World!') a9=> r
STOP ;7rd;zJ
END d<x1*a
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HTML D*\v0=P'?
<HTML> }taLk@T
<HEAD> n#BvW,6J
<TITLE> Hello World! </TITLE> !EOQhh
</HEAD> QdDObqVdy
<BODY> `?|Rc
<p>Hello World!</p>
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</BODY> x?
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</HTML> TnNWO+kg
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INTERCAL $W&:(&
PLEASE DO ,1 <- #13
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DO ,1 SUB #1 <- #238 M+poB+K.
DO ,1 SUB #2 <- #112 q8>t!rh<R
DO ,1 SUB #3 <- #112 IkDiT63]I
DO ,1 SUB #4 <- #0 x7dEo%j
DO ,1 SUB #5 <- #64 /[K_
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