“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。 k/hD2tBLu
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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》。 Tgf#I*(^]
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以下是用不同语言写成的Hello World程序的几个例子: )$.::[pNA
Ada lhN2xg5x
with Ada.Text_Io; use Ada.Text_Io; )C@O7m*.4
procedure Hello is gHB*u!w7Z
begin YEg(QOn3Q
Put_Line ("Hello, world!"); K]
end Hello; g"F&~y/p
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汇编语言 e?V7<7$
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x86 CPU,DOS,TASM C'_^DPzj
MODEL SMALL OrZ =-9"
IDEAL =`1#fQDt
STACK 100H }u>F}mUa
P Tc@MH)
DATASEG >Z\{P8@k0
HW DB 'Hello, world!$' ['*{f(AI
+bGj(T%+'
CODESEG TN+iv8sT
MOV AX, @data ?3#W7sF
MOV DS, AX >`3wEJ"<
MOV DX, OFFSET HW Dm")\"5\?
MOV AH, 09H &J
<k m
INT 21H GW29Rj1
MOV AX, 4C00H S m%\,/3
INT 21H XVlZ:kz
END oC~8h8"l
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6c?;-5.
x86 CPU,GNU/Linux,NASM ZSBa+3;z
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). iut[?#f^
;Enter this into "hello.asm" then type: V[w Y;wj
;"nasm -f elf hello.asm" &?#,rEw<x
;"ld hello.o -o hello" D)]U+Qk
;"./hello" 'R{XqHP
)t$<FP
section .data ;data section declaration pZYcCc>6&
msg db 'Hello World!',0AH ;x|E}XD
len equ $-msg ;string length "5 /i
wfecM(
section .text ;code section declaration uA'S8b%C
global _start ;entry point (start of execution) )YKnFSm
_start: mov edx,len ;string length n%SR5+N"
mov ecx,msg ;string start fku\O<1
mov ebx,1 ;file handle: stdout j[^(<R8
mov eax,4 ;sys_write /|kR=
~
int 80h ;kernel system call ="k9
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015
;'V#we
mov ebx,0 ;return value )@IDmz>
mov eax,1 ;sys_exit 4P>[]~S
int 80h ;kernel system call efc<lSUR
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c]eDTbXd
x86 CPU,Windows,MASM32 >nqDUGnEo>
.386 8|Q=9mmWOh
.model flat,stdcall n!Ic.T3PA
option casemap:none up# R9
d|
;Include 文件定义 xg|\\i
include windows.inc 17\5NgB
include user32.inc :RxWHh3O
includelib user32.lib lj U|9|v
include kernel32.inc )&nfV5@"
includelib kernel32.lib PNSV?RT*pG
;数据段 *2?-6
.data G$eA(GE
szCaption db 'A MessageBox!',0 feSj3,<!
szText db 'Hello,world!',0 9AA_e
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;代码段 &D/@H1fBe
.code FLb
Q#c\
start: rz@FUU:&
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK Epl\(
invoke ExitProcess,NULL cE|Z=}4I7
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> (i 3=XfZ!C
end start D~(f7~c%
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AWK bh[`uRC}
BEGIN { print "Hello, world!" } bm</qF'T6
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BASIC }[$qn|
传统版BASIC(例如GWBASIC): dr54D
gsSUm f1
10 PRINT "Hello, world!" hB!>*AsG
20 END eB]R<a60
>" z$p@7
或在提示符输入: [!<W{ ($5
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?"Hello, world!":END snH9@!cG8
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现代版BASIC(例如Quick BASIC): LdPA`oI3j
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Print "Hello, world!" Qw,{"J
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以下的语句在Quick BASIC中同样有效: ?}n\&|+
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? "Hello,world!" |([|F|"
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) ]y^RrD
BCPL _wY<8 F*
GET "LIBHDR" S,*
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LET START () BE ;7HL/-
$( FEF $4)ROv
WRITES ("Hello, world!*N") t=6[FK
$) TA~FP#.
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Befunge Za>0&Fnf
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Brainfuck '1Z3MjX
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#include <stdio.h> m0a <~
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int main(void) "L)=Y7Dx
{ d$;1%rRj8
printf("Hello, world!\n"); 5TB==Fj ?
return 0; (v2.8zrJ
} R|,F C'
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Bm\OH#
C++ ,Qw\w,
#include <iostream> ;"1
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int main() zNo(|;19
{ Ed^F_Gg#
std::cout << "Hello, world!" << std::endl; 8#_"WzDw
return 0; (UGmbRf&
} /5s,<
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C++/CLI )yyS59s
int main() "x"y3v'
{ N =0R6{'
System::Console::WriteLine("Hello, world!"); |E7)s;}D
} %(v<aEQtt
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C# (C Sharp) giNyD4uO
class HelloWorldApp sP`
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{ D_(K{?KU
public static void Main() oKlO cws}
{ eN?:3cP#l
System.Console.WriteLine("Hello, world!"); OpT0V]k^"9
} Ze:Y"49S+>
} (+=TKI<=
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COBOL &qP@WFl
IDENTIFICATION DIVISION. xn`<g|"#
PROGRAM-ID. HELLO-WORLD. :
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ENVIRONMENT DIVISION. HXg4
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DATA DIVISION. (!iGQj(m
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PROCEDURE DIVISION. F87aIJ.pGN
DISPLAY "Hello, world!". w]Fi:kV
STOP RUN. ;[[GA0
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Common Lisp rdY/QvP0=
(format t "Hello world!~%") G._E9
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DOS批处理 ?t{ 2y1
@echo off ~5xs$ub
echo "Hello, world!" kl90w
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9"TPAywd
Eiffel J
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class HELLO_WORLD w' gKE'c
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creation A`
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make (H*d">`mz
feature 6IQkP9P(
make is + mqz)-x
local Wz^M*=,
io:BASIC_IO ,7{}}l
do bR*/d-v^
!!io mI[$c"!BD
io.put_string("%N Hello, world!") \XUG-\$p
end -- make :.k)!
end -- class HELLO_WORLD D]h~\
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Erlang KJf~9w9U
-module(hello). 5%5z@Ka
-export([hello_world/0]). ; {P"~(S%
\EC=#E(
hello_world() -> io:fwrite("Hello, World!\n"). Gw;[maM!%`
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\s[/{3
Forth B9-Nb 4
." Hello, world!" CR ji|`S\u#b
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Fortran `iiZ
WRITE(*,10) 5>e3srKu
10 FORMAT('Hello, World!') Fk 5;
STOP >;;tX3(
END ^uy2qO4Yw
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``:AF:
HTML N`DLIv8i;
<HTML> ?B&@
<HEAD> O;ty
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<TITLE> Hello World! </TITLE> ?rD`'B
</HEAD> G|p3NhLgO=
<BODY> g8_C|lVZi
<p>Hello World!</p> iuX82z`
</BODY> JVORz-uBs
</HTML> `xhiG9mz~
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INTERCAL CZ/bO#~
PLEASE DO ,1 <- #13 Y]5\%JR
DO ,1 SUB #1 <- #238 h9McC 3
DO ,1 SUB #2 <- #112 Q/%(&4>'y
DO ,1 SUB #3 <- #112 `FP)-^A8
DO ,1 SUB #4 <- #0 3q>6gaTv
DO ,1 SUB #5 <- #64 vFK&63
DO ,1 SUB #6 <- #238 vu%:0p`K
DO ,1 SUB #7 <- #26 PC_#kz
DO ,1 SUB #8 <- #248 GnE%C2L-
DO ,1 SUB #9 <- #168 zs@#.OEH
DO ,1 SUB #10 <- #24 PC| U]
DO ,1 SUB #11 <- #16 5!55v
DO ,1 SUB #12 <- #158 s7FJJTn
DO ,1 SUB #13 <- #52 (;V=A4F-D
PLEASE READ OUT ,1 0.}Um
PLEASE GIVE UP _l&`*
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\}ujSr#<