“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。 M_I.Y1|
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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》。 fY4I(~Q
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以下是用不同语言写成的Hello World程序的几个例子: W)_|jpd[
Ada &RJ*DAmL
with Ada.Text_Io; use Ada.Text_Io; Fb!Ew`;QT
procedure Hello is i,H(6NL.
begin R@X65o
Put_Line ("Hello, world!"); V< Ib#rd'
end Hello; *:5S*E&}V
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z#[PTqD-_
汇编语言 L@5j? N?F
3s]aXz:
x86 CPU,DOS,TASM <2n5|.:>
MODEL SMALL NihUCj"
IDEAL {\WRW}iO
STACK 100H 2;wpD2
g"Tb\
DATASEG `hl8j\HV<}
HW DB 'Hello, world!$' kqH:H~sgD
)+ V)]dS@%
CODESEG o=nF .y
MOV AX, @data "1l$]=C*
MOV DS, AX V&h{a8xa$
MOV DX, OFFSET HW 0h=}BCb+i
MOV AH, 09H 0!Vza?9
INT 21H `SH14A*
MOV AX, 4C00H Ka_g3
INT 21H ;!+-fn4C
END $} @gR]
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O#do\:(b
x86 CPU,GNU/Linux,NASM yPd6{% w
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). g5C$#<28
;Enter this into "hello.asm" then type: T4nWK!}z
;"nasm -f elf hello.asm" 9+iz+
;"ld hello.o -o hello" .6=;{h4cpB
;"./hello" i91 =h
~m'8<B5+
section .data ;data section declaration h+ms%tNT
msg db 'Hello World!',0AH }G)2HTaZ
len equ $-msg ;string length U *:ju+)k
*N|ak =
section .text ;code section declaration 4;bc!>
sfC
global _start ;entry point (start of execution) SDc8\ms
_start: mov edx,len ;string length LPeVr^
mov ecx,msg ;string start -N'wKT5
mov ebx,1 ;file handle: stdout F%:74.]Y
mov eax,4 ;sys_write `h'7X(
int 80h ;kernel system call LVNA`|>
nWes,K6T
mov ebx,0 ;return value iYf)FPET
mov eax,1 ;sys_exit 8og8;#mnyr
int 80h ;kernel system call fm^J-
B'e@RhU;
8:;]tt
x86 CPU,Windows,MASM32 ;nx.:f
.386 i-}Tt<^
.model flat,stdcall TILH[r&Jg
option casemap:none JvsL]yRT
;Include 文件定义 }BUm}.-{u,
include windows.inc P6I<M}p
include user32.inc (!PsK:wc
includelib user32.lib %g~&$oZmq
include kernel32.inc ~dC.,"
includelib kernel32.lib z1^3~U$}
;数据段 c{IL"B6>
.data zm{`+boH<
szCaption db 'A MessageBox!',0 =axuL P))
szText db 'Hello,world!',0 '
<?=!&\D
;代码段 #N$\d4q9
.code
i-ww@ XOQ
start: (HXKa][T
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK .Y0O.
invoke ExitProcess,NULL UcKVLzKs
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> MH|F<$42
end start ifNyVEHy
Ncr Bp(
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AWK [C/{ ru&E
BEGIN { print "Hello, world!" } &ty-aB=F
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BASIC Dkx}}E:<
传统版BASIC(例如GWBASIC): BCuoFw)
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10 PRINT "Hello, world!" %^d<go^
20 END =CW> ;h]
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或在提示符输入: jz~#K;3=,
Zd'Yu{<_2N
?"Hello, world!":END /:^nG+
#].qjOj
现代版BASIC(例如Quick BASIC): tLU@&NY`
@^<&LG5^
Print "Hello, world!" U)M&AYb
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以下的语句在Quick BASIC中同样有效: ^s#+`Y05/
BNF*1JO
? "Hello,world!" kl[(!"p
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TG 6-e_
V c;g$Xr[
BCPL _^eiN'B
GET "LIBHDR" VC0Tqk
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LET START () BE Ke:WlDf
$( Bd 0oA
)i
WRITES ("Hello, world!*N") kBLFK3i
$) 0y t36Du
omGzyuPF
XdmpfUR,13
Befunge P*B@it
"!dlrow olleH">v a~J!G:(
, 5}Id[%.x
^_@ ;5.<M<PH
jo0XF]
LEOri=?RF
Brainfuck <Y6zJ#BD
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< `K:n=hpF
+++++++++++++++.>.+++.------.--------.>+.>. eEfGH
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4Y}Nu
C z]SEPYq:
#include <stdio.h> *>"NUHq
:nR80]
int main(void) }K@m4`T
{ b`$qKO
printf("Hello, world!\n"); B'Jf&v
return 0; 4:S]n19nq
} SSCs96
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2 S~( P
C++ 2@lGY_O!m
#include <iostream> !*L)v
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int main()
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{ + kT ]qH
std::cout << "Hello, world!" << std::endl; uY(8KW
return 0; @87Y/_l
} ',xUU{5?
UGd\`*Cj
4`)r1D!U
C++/CLI c-5AI{%bl6
int main() \b%c_e
{ FNuE-_
System::Console::WriteLine("Hello, world!"); y2#"\5dC
} M]p-<R\
k7Qs#L
(_!I2"Q*
C# (C Sharp) 9) ,|h
class HelloWorldApp {aq)Y>o5:T
{ #R:&Irh
public static void Main() m<)`@6a/
{ cfilH"EK
System.Console.WriteLine("Hello, world!"); :hs~;vn)
} }eW<P079
} 4_iA<}>|
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COBOL fz`)CWo:
IDENTIFICATION DIVISION. d5>&,
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PROGRAM-ID. HELLO-WORLD. 1KrJS(.
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ENVIRONMENT DIVISION. hrq% { !Z
P`{$7ST'Hh
DATA DIVISION. 14 ,t
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PROCEDURE DIVISION. yU&