“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。 rT;_"y}
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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》。 LX(`@-<DH
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以下是用不同语言写成的Hello World程序的几个例子: Zlv`yC*r
Ada :Yi 4Ia
with Ada.Text_Io; use Ada.Text_Io; y#nyH0U
procedure Hello is
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begin ph3dm\U.
Put_Line ("Hello, world!"); n ,@ge
end Hello; g{hbq[>X]
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汇编语言 `Tr !Gj_
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x86 CPU,DOS,TASM b\xse2#
MODEL SMALL WmblY2
IDEAL ?~; q r
STACK 100H h|EHK!<"8
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DATASEG hM8FN
HW DB 'Hello, world!$' FCChB7c`
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CODESEG Oz=!EG|N
MOV AX, @data NDG?Xs [2
MOV DS, AX ka:wD?>1i
MOV DX, OFFSET HW %:Zp7O2UB'
MOV AH, 09H ahw0}S
INT 21H %vU*4mH
MOV AX, 4C00H vARZwIu^D
INT 21H :(4];Va
END +F^X1
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x86 CPU,GNU/Linux,NASM W\z<p P
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). ,u
;Enter this into "hello.asm" then type: Bh6lK}9
;"nasm -f elf hello.asm" ?xo<Fv
;"ld hello.o -o hello" )GJlQ1x
;"./hello" dg;E,'e_
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section .data ;data section declaration w%kaM=
msg db 'Hello World!',0AH 62>/0_m5
len equ $-msg ;string length C,5Erb/
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section .text ;code section declaration $)7Af6xD
global _start ;entry point (start of execution) &fifOF#[e
_start: mov edx,len ;string length oX[I4i%G
mov ecx,msg ;string start fU4{4M+9"
mov ebx,1 ;file handle: stdout lziC.Dpa
mov eax,4 ;sys_write 2Zw]Uu`sb
int 80h ;kernel system call _P{v=`]Eu
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mov ebx,0 ;return value ]w9syz8X
mov eax,1 ;sys_exit %l)~C%T
int 80h ;kernel system call ^r~R]stE^
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x86 CPU,Windows,MASM32
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.386 (OHd} YQ
.model flat,stdcall yykyvy
option casemap:none ,
-S n
;Include 文件定义 2)>Ty4*
include windows.inc lV2MRxI
include user32.inc ktK/s!bgY
includelib user32.lib `H\NJ,
include kernel32.inc :a9$f8*b
includelib kernel32.lib m{sch`bP
;数据段 v7-
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.data 7j%sM&
szCaption db 'A MessageBox!',0 }#U3vMx(
szText db 'Hello,world!',0 6c&OR2HGqO
;代码段 l ~ /y
.code e\>g@xE%
start: <2RxyoDL6
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK ~b{j`T
invoke ExitProcess,NULL 7q:
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end start G6x 2!Ny
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BEGIN { print "Hello, world!" } N\dr_
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BASIC {01wW1
传统版BASIC(例如GWBASIC): 3$ 1 z
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10 PRINT "Hello, world!" )z?Kq0
20 END mF !=H%
,W/D 0
或在提示符输入: /1q] D8
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?"Hello, world!":END p,w6D,h
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现代版BASIC(例如Quick BASIC): VCvqiHn
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Print "Hello, world!" F-n1J?4b
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以下的语句在Quick BASIC中同样有效: M^^u{);q
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? "Hello,world!" 3It'!R8 $
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GET "LIBHDR" O({-lI
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LET START () BE +6{KrREX)
$( VRoeq {
WRITES ("Hello, world!*N") $*H>n!&
$) E
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Befunge [J+K4o8L<A
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Brainfuck JCZJ\f*EZ
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+++++++++++++++.>.+++.------.--------.>+.>. ^ :Q |,oy
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C #
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#include <stdio.h> G$4lH>A&
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int main(void) xMhR;lKY
{ yZFvpw|g
printf("Hello, world!\n"); V|HSIJ#J
return 0; VkhK2
}
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C++ qm]ljut
#include <iostream> 8gBqur{
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int main() ZVIBmx
{ 2 >xV&