“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。 V\hct$ 7Vm
1AV1W_"
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》。 XJ?z{gXJ
+`3ZH9
以下是用不同语言写成的Hello World程序的几个例子: -y*+G&
Ada (UT*T
with Ada.Text_Io; use Ada.Text_Io; .T-p]9*p
procedure Hello is GnaVI
begin *)D*iU&
Put_Line ("Hello, world!"); R_&z2I
end Hello; 8|Y^Jn\p5u
W3rvKqdw5
S
IK{GWX
汇编语言 M=`Se&-M
S$On$]~\"
x86 CPU,DOS,TASM 2`m _"y
MODEL SMALL @il}0
IDEAL CW YJ<27v{
STACK 100H B[X6AQj}d
to=##&ld<
DATASEG d`7] reh
HW DB 'Hello, world!$' 8E%*o
x,_Ucc.
CODESEG |YFlJ2w
MOV AX, @data 5&@ U T
MOV DS, AX +0 |0X {v
MOV DX, OFFSET HW }TL"v|ny6;
MOV AH, 09H Tou~U[V+
INT 21H hI{Yg$H1
MOV AX, 4C00H UQPE )G
INT 21H Oh4WYDyT
END F[Sat;Sll
dtl<
:|3C-+[
x86 CPU,GNU/Linux,NASM c?",kzo
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). }TvAjLIS6
;Enter this into "hello.asm" then type: QLG,r^
;"nasm -f elf hello.asm" QjU"|$
;"ld hello.o -o hello" }>U03aa!
;"./hello" "iGc'?/+
-h`0v
section .data ;data section declaration .&.CbE8K[
msg db 'Hello World!',0AH >E=a~ O
len equ $-msg ;string length O8o18m8UH
&W!@3O{~.
section .text ;code section declaration a<.@+sj{
global _start ;entry point (start of execution) 7HFO-r118
_start: mov edx,len ;string length V'/%)oU\"
mov ecx,msg ;string start ev
>9P
mov ebx,1 ;file handle: stdout B ;$8<
mov eax,4 ;sys_write &,7(Wab
int 80h ;kernel system call m
0PF"(
oX,M;;Yq
mov ebx,0 ;return value i`L66uV
mov eax,1 ;sys_exit rnE'gH(V'
int 80h ;kernel system call Su #1yw>
+-d>Sl (
Cz)D3Df^
x86 CPU,Windows,MASM32 T]2q >N
.386 heA\6W:u&
.model flat,stdcall jqedHnx
option casemap:none +ETw:i9!?
;Include 文件定义 C\D4C]/8
include windows.inc 0fU>L^P_?
include user32.inc blv6
includelib user32.lib f}eVfAf
include kernel32.inc 5GkM7Zu!{j
includelib kernel32.lib kGP?Jx\PkH
;数据段 xpwzz O*U
.data @("AkYPj
szCaption db 'A MessageBox!',0 l !v#6#iq
szText db 'Hello,world!',0 v^G5
N)F
;代码段 ?VsZo6Z"
.code ERjf.7)d
start: D(|$6J 0
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK 5Ncd1
invoke ExitProcess,NULL iI0 'z=J
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> hd-ds~ve
end start "(qO}&b>
my6T@0R
(eP)>G]
AWK H1M>60*
BEGIN { print "Hello, world!" } WgB,,L,
owhht98y(
ta(x4fP_
BASIC gEu\X|7'
传统版BASIC(例如GWBASIC): dD%m=x
6}$cDk`dz
10 PRINT "Hello, world!" ' M!_k+e
20 END n3\vq3^?
vcHDFi
或在提示符输入: 'P#I<?vB
9nE%r\H
?"Hello, world!":END 5hMiCod
)j'b7)W\
现代版BASIC(例如Quick BASIC): .O^|MhBJu
0
CS_-
Print "Hello, world!" $B2@mC([S
h!
<8=V(
以下的语句在Quick BASIC中同样有效: q'q{M-U<
5cU8GgN`
? "Hello,world!" g2I @j3
:>k\uW
ilP&ctn6+c
BCPL ,J~dER\%
GET "LIBHDR" .\ZxwD|
:lAR;[WFS
LET START () BE (hoqLL\}k
$( I}X8-WFB
WRITES ("Hello, world!*N") ;z68`P-
$) =3'wHl
M<nn+vy`
~xCy(dL^}
Befunge fu/c)D6u*m
"!dlrow olleH">v w#XJ!f6*_9
, XV&