“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。 :Q_3hK
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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》。 TL0[@rr4
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以下是用不同语言写成的Hello World程序的几个例子: .Z\Q4x#!Z
Ada J !HjeZ
with Ada.Text_Io; use Ada.Text_Io; 6N~q`;p0
procedure Hello is ZmEEj-*7s
begin y(W|eBe
Put_Line ("Hello, world!"); DM{ 4@*]
end Hello; wN=;i#
%lw! e
0w=R_C)s
汇编语言 4J0Rvod_
y<:<$22O
x86 CPU,DOS,TASM fv!?Ga(
MODEL SMALL hK|j6xf.o
IDEAL p{D4"Qn+P9
STACK 100H _;
Y`
T/1gI9X
DATASEG @?
c2)0
HW DB 'Hello, world!$' Cbm\h/PXl
;30nd=
CODESEG T>`74B:
MOV AX, @data r^Zg-|gr
MOV DS, AX a^U~0i@[S
MOV DX, OFFSET HW {)8>jxQN
MOV AH, 09H QXgE
dsw
INT 21H N$>^g"6o
MOV AX, 4C00H 457\&
INT 21H _Q[$CcDEE
END ar9]"s+'
TS2ZF{m
aJ") <_+
x86 CPU,GNU/Linux,NASM hrG M|_BE
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). >TkE~7?l
;Enter this into "hello.asm" then type: f y:,_#
;"nasm -f elf hello.asm" G 0%6ch^%
;"ld hello.o -o hello" L|P5=/d
;"./hello" /1mW|O>0
i0$Bx>
section .data ;data section declaration T&4qw(\G
msg db 'Hello World!',0AH ]vWKR."4
len equ $-msg ;string length Szbb_i{_
`
bef_rH@`
section .text ;code section declaration aT>'.*\ ]
global _start ;entry point (start of execution) +_XzmjnDd
_start: mov edx,len ;string length
ks$JP6
mov ecx,msg ;string start
)M6w5g
mov ebx,1 ;file handle: stdout V=:'SL*3|
mov eax,4 ;sys_write W`\R%>$H
int 80h ;kernel system call P:30L'.=[
91=OF*w
mov ebx,0 ;return value KD`IX-r{s
mov eax,1 ;sys_exit +s- lCz
int 80h ;kernel system call uwz)($~bp
\jOA+FU[
Zt.'K(]2h
x86 CPU,Windows,MASM32 o.0ci+z@
.386 ='`/BY(m[
.model flat,stdcall {} 3${
option casemap:none Q09[[
;Include 文件定义 S30?VG9U0f
include windows.inc :<}=e@/~|
include user32.inc %Ev4]}2C1
includelib user32.lib 0NS<?p~_S
include kernel32.inc :2
*g~6
includelib kernel32.lib ^$b Y,CE
;数据段 o4|M0
.data 0aG ni|
szCaption db 'A MessageBox!',0 XUz3*rfs
szText db 'Hello,world!',0 SHe49!RA'{
;代码段 9I6a"PGDb
.code !\7!3$w'8,
start: a!=D [Gz*5
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK \ExMk<y_&
invoke ExitProcess,NULL wK?vPS
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> u6AA4(
end start *MKO
I'
L7dd(^
wne,e's}
AWK gt@m?w(
BEGIN { print "Hello, world!" } >m$1Xx4#GV
%J+E/
KV(Q;~8"X
BASIC &L=suDe
传统版BASIC(例如GWBASIC): |olA9mp|]
g:hjy@ w
10 PRINT "Hello, world!" =vX/{C
20 END 1*\o.
16=sij%A
或在提示符输入: ]n6#VTz*
~E17L]ete
?"Hello, world!":END JRB9rSN^
JMC. w!
现代版BASIC(例如Quick BASIC): '=b/6@&
HiZ*+T.B
Print "Hello, world!" uXn1
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以下的语句在Quick BASIC中同样有效: os=e|vkB*
%)1y AdG
8
? "Hello,world!" rC5
p-B%
H\ F:95
'jWr<]3
BCPL M:Pc,
GET "LIBHDR" !fE`4<