“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。 x7@WWFF>
];I| _fXo%
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》。 1SFKP$^
XsOOkf\_
以下是用不同语言写成的Hello World程序的几个例子: C^%zV>o
Ada !1RV[b.8
with Ada.Text_Io; use Ada.Text_Io; p\{+l;`
procedure Hello is X]yERaJ,i
begin lz)"zV
Put_Line ("Hello, world!"); g&Z7h4!\
end Hello; Y1 P[^ws
|g7h#F~
E~>6*_?
汇编语言 reA8=>b/
`oMeR]~
x86 CPU,DOS,TASM Wv0'?NL.
MODEL SMALL SznE:+
IDEAL |w JZU
STACK 100H YF -w=Y6
<nvWC/LU
DATASEG ?fmt@@]T?
HW DB 'Hello, world!$' z/YMl3$l~
>jX
UO
CODESEG Hk]BC
MOV AX, @data 3\KII9
MOV DS, AX <c ovApx
MOV DX, OFFSET HW ~}5Ml_J$,l
MOV AH, 09H h6h1.lZ
INT 21H u3wC}Zo
MOV AX, 4C00H U R@BSK'
INT 21H r}\h\ {
END M?B(<j1Ri
IMGqJc,7
'%EZoc/U
x86 CPU,GNU/Linux,NASM d# 3tQ*G/
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). LO]6Xd"
;Enter this into "hello.asm" then type: eUkoVr
;"nasm -f elf hello.asm" JQ_gM._3
;"ld hello.o -o hello" {%_j~
;"./hello" CjQ"o Qw
5FSv"=
section .data ;data section declaration , Ln
msg db 'Hello World!',0AH u-[t~-(a
len equ $-msg ;string length T'M66kg
Q==v!"Gi|
section .text ;code section declaration (L5'rNk
global _start ;entry point (start of execution) eFSC^
_start: mov edx,len ;string length yb{Q, Dz
mov ecx,msg ;string start M%{?\)s
mov ebx,1 ;file handle: stdout R*@[Pg*
mov eax,4 ;sys_write jBv$^L
int 80h ;kernel system call EB>B,#
z@~&Kwf\}
mov ebx,0 ;return value }[z<iij4
mov eax,1 ;sys_exit 8}, <e>q
int 80h ;kernel system call T;4`wB8@
A,gx5!J
}{8Fo4/
x86 CPU,Windows,MASM32 HB7(
.386 D4q>R;
.model flat,stdcall YvruK:I
option casemap:none `OP>(bU0
;Include 文件定义 lB!vF ~A&
include windows.inc 6B''9V:s
include user32.inc X
B*}P
includelib user32.lib m*!f%}T
include kernel32.inc ^$IZLM?E~
includelib kernel32.lib 14D7U/zer
;数据段 *w/WHQ`xI
.data _;:rkC fj
szCaption db 'A MessageBox!',0 8rwYNb.P
szText db 'Hello,world!',0 lKEX"KQ!
;代码段 ~pevU`}Uqc
.code ^5]uBOv
start: N\q)LM !M
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK iS"8X#[]N
invoke ExitProcess,NULL uyNJN
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Vd+Q:L
end start <'[Ku;m
d;~ 3P
=dM.7$6) R
AWK voV:H[RD9
BEGIN { print "Hello, world!" } -+}5ma
T;!ukGoFP
&$c5~9p\B
BASIC 7':f_]
传统版BASIC(例如GWBASIC): +~d1;0l|
|qlS6Aln
10 PRINT "Hello, world!" x=5P+_
20 END e8WEz
4r_
kT^*>=1
或在提示符输入: ku9@&W+
e3eVvl5]
?"Hello, world!":END mF'-Is
=3|pHc hJ4
现代版BASIC(例如Quick BASIC): fpvvV(
Ad;S=h8:
Print "Hello, world!" |mxNUo-
S<nP80C
以下的语句在Quick BASIC中同样有效: .G}k/`a
w<65S
? "Hello,world!" PW%1xHLfk
5g``30:o
WRD
A `
BCPL [5Fd P0
GET "LIBHDR" i3Hz"Qs;
Sty!atEWT
LET START () BE dTN$y\
$( *bA+]&dj\
WRITES ("Hello, world!*N") R-pH Quu3
$) gg-};0P-
mX&xn2}qZ"
h2wN<