“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。 1#nY Z%
*NQsD C.J^
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》。 /(Ryh6M
@0iXqM#jH
以下是用不同语言写成的Hello World程序的几个例子: u(4o#m
Ada O
@{<?[
with Ada.Text_Io; use Ada.Text_Io; S|T*-?|
procedure Hello is &;$- &;
begin je=XZ's,i~
Put_Line ("Hello, world!"); Ej'N!d.
end Hello; 6KKQ)DNu_
10r9sR
$H1igYc
汇编语言 [k7 ;^A5/
r[AqA
x86 CPU,DOS,TASM &dJ\}O[r
MODEL SMALL 'BNZUuUl
IDEAL ShMP_?]P
STACK 100H saR9_
ux
tflUy\H>
DATASEG -FQS5Zb.!
HW DB 'Hello, world!$' 4,:)%KB"V
MMf_
CODESEG Io<L!
=>
MOV AX, @data 9D51@b6k
MOV DS, AX ,w7ZsI4:[
MOV DX, OFFSET HW d6~d)E
MOV AH, 09H 0mI4hy
INT 21H jQpG7H
MOV AX, 4C00H DO
,7vMO
INT 21H /
2h6
END (0zYS_mA
l# |M.V6G
&F|Wk,y
x86 CPU,GNU/Linux,NASM ou[Wz{
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). :47"c3J
;Enter this into "hello.asm" then type: .
"`f~s\G
;"nasm -f elf hello.asm" OZE.T-{
;"ld hello.o -o hello" E# *`u
;"./hello" $"`e^J9!!
c.h_&~0qf
section .data ;data section declaration u1/q8'RW
msg db 'Hello World!',0AH 42 0cbD3a
len equ $-msg ;string length 4j~WrdI*
wKAxUPzm
section .text ;code section declaration s7:w>,v/
global _start ;entry point (start of execution) ]VK9d;0D
_start: mov edx,len ;string length o^<W3Z
mov ecx,msg ;string start
fG|+!
mov ebx,1 ;file handle: stdout Rlx
mov eax,4 ;sys_write @wa<nYd
int 80h ;kernel system call qnf\K}
bs_rw+
mov ebx,0 ;return value Sigu p#.p
mov eax,1 ;sys_exit 2w/qH4
int 80h ;kernel system call c/`Rv{*'o
:c0 |w
Kg#s<# h
x86 CPU,Windows,MASM32 :w:ql/?X
.386 aN~x3G
.model flat,stdcall anFl:=
option casemap:none /5C>7BC
;Include 文件定义 YPS,[F'B.
include windows.inc gEnc;qb
include user32.inc r%^XOw<'
includelib user32.lib _O"C`]]
include kernel32.inc [,q^\T
includelib kernel32.lib %YI !{
;数据段 /G#W/Q
.data rvBKJ!b0
szCaption db 'A MessageBox!',0
-(|}:J
szText db 'Hello,world!',0 t2&}
;代码段 73(5.'F
.code %)j^>W5
start: SRc|9W5t*J
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK @RLlkWGc
invoke ExitProcess,NULL 1xMD
)V:
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> LQ4F/[1}
end start j'&a)-Wx_
bv'Z~@<c
S-G#+Ue2
AWK Z n]e2
BEGIN { print "Hello, world!" } szD
BfGd%j
8Nxyc>8K~
*G;D u`;
BASIC <^B!.zQ
传统版BASIC(例如GWBASIC): LZrkFkiC
rYk
10 PRINT "Hello, world!" uCGn9]
20 END jX
6+~
k{pn~)xg
或在提示符输入: nokMS
LX iis)1
?"Hello, world!":END ? p^ ':@=
KPs
@v@5M
现代版BASIC(例如Quick BASIC): )\,hc$<=m
T
eBJ
Print "Hello, world!" S3_QOL
Gm'Ch}E
以下的语句在Quick BASIC中同样有效: v@
OM
_c6 zzGtH
? "Hello,world!" =s[P =d U
{$^Lb4O[V
)lB*]
n`Z]
BCPL p?eQN
Y
GET "LIBHDR" HZzdelo
C**kJ
LET START () BE J|[`8 *8
$( Ov8{ny
WRITES ("Hello, world!*N") px.]m-
$) aFwfF^\(|,
fO$~jxR.
cLCzLNyKl
Befunge Q
OP8{~O
"!dlrow olleH">v O,!4
W\s
, AC/8 2$
^_@ 2[$` ]{U
<