“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。 ]'6'<S
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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》。 Vp\80D&
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以下是用不同语言写成的Hello World程序的几个例子: o[n<M>@
Ada lh~<s2[R2
with Ada.Text_Io; use Ada.Text_Io; ^+URv
procedure Hello is b.@H1L
begin F/xCG nP-
Put_Line ("Hello, world!"); u(8~4P0w
end Hello; F6DxvyANr
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汇编语言 PRZ8X{h
Dl&PL
x86 CPU,DOS,TASM xg{VP7
MODEL SMALL tr5'dX4]
IDEAL K:uQ#W.&
STACK 100H S;>4i!Mb
^
C)U #T)
DATASEG ),MU+*`
HW DB 'Hello, world!$' 9n-T5WP
t z"5+uuu
CODESEG E`(5UF*>
MOV AX, @data &+,:u*%
MOV DS, AX iF8@9m
MOV DX, OFFSET HW {[my"n2
MOV AH, 09H CH55K[{<
INT 21H Imke/ =h
MOV AX, 4C00H pmoGudaRF
INT 21H :&qC <UD
END gO9'q='5l
L!?v BL
2 aew6~
x86 CPU,GNU/Linux,NASM QN3qF|))
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). \)p4okpR
;Enter this into "hello.asm" then type: ^4RO
;"nasm -f elf hello.asm" <|B$dz?r
;"ld hello.o -o hello" Tm%WWbc
;"./hello" aD?# ,
Z(l9>A7!
section .data ;data section declaration %Fs*#S
msg db 'Hello World!',0AH K?$9N}+
len equ $-msg ;string length AL(n*,
i[o&z$JO
section .text ;code section declaration sN"p5p
global _start ;entry point (start of execution) Av@&hD\
_start: mov edx,len ;string length ;tXB46
mov ecx,msg ;string start ]!]`~ Z/
mov ebx,1 ;file handle: stdout q|R+x7x
mov eax,4 ;sys_write ^8b~ZX
int 80h ;kernel system call $xLEA\s
p
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mov ebx,0 ;return value l#tS.+B7
mov eax,1 ;sys_exit "L ^TT2
int 80h ;kernel system call UB5}i('L
1 d=0q?nH
RA#\x.
x86 CPU,Windows,MASM32 {bW"~_6}
.386 qw6EP C
.model flat,stdcall UIO6|*ka
option casemap:none 7ytm.lU
;Include 文件定义 .L~f Fns/
include windows.inc aIQrb
include user32.inc !&'# a
includelib user32.lib N9`y,Cos0
include kernel32.inc #"=%b
e3
includelib kernel32.lib =|^X$H
;数据段 'Na|#tPYI
.data (qNco8QKu3
szCaption db 'A MessageBox!',0 Up_>y>x
szText db 'Hello,world!',0 s.<olxXRW
;代码段 I/u'bDq
.code 58M'r{8_
start: I[tAT[ <
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK >&*6Fqd
invoke ExitProcess,NULL kqjxJ5
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> +I^+k "
end start c ,Qw;
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AWK 9m%7dsv
BEGIN { print "Hello, world!" } e@='Q H
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BASIC 71K\.[ =-
传统版BASIC(例如GWBASIC): Na~g*)uT$
}~7H2d);-
10 PRINT "Hello, world!" R
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20 END .q
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或在提示符输入: e-nWD
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?"Hello, world!":END d)`nxnbMeM
i n[n Aa
现代版BASIC(例如Quick BASIC): 9itdRa==
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y
Print "Hello, world!" _Ym&UY.u#
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以下的语句在Quick BASIC中同样有效: ^G]KE8
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? "Hello,world!" Hj}g1"RA
z'5;f;
^4n2
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BCPL Ws2prh^e(
GET "LIBHDR" 9OrA9r
Y2RxD\!Z
LET START () BE 'DaNR`9
$( m]+X}|
WRITES ("Hello, world!*N") 9'L1KQ
$) ^N*pIVLC
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31
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Befunge Ri^sQ<