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RSS订阅二进制炸弹(binary bomb)
共有48个炸弹，每个炸弹分为7各阶段（含一个隐藏的）
此包为源文件，不包含解决方案，解决方案请见：http://www.cnblogs.com/kaimin
2012-10-23
Lisp之根源（初学则必看）手册
保罗格雷厄姆（Paul Graham）
约翰麦卡锡于1960年发表了一篇非凡的论文,他在这篇论文中对编程的贡献有如欧几里德对几何的贡献.1 他向我们展示了,在只给定几个简单的操作符和一个表示函数的记号的基础上, 如何构造出一个完整的编程语言. 麦卡锡称这种语言为Lisp, 意为List Processing, 因为他的主要思想之一是用一种简单的数据结构表(list)来代表代码和数据.
值得注意的是,麦卡锡所作的发现,不仅是计算机史上划时代的大事, 而且是一种在我们这个时代编程越来越趋向的模式.我认为目前为止只有两种真正干净利落, 始终如一的编程模式:C语言模式和Lisp语言模式.此二者就象两座高地, 在它们中间是尤如沼泽的低地.随着计算机变得越来越强大,新开发的语言一直在坚定地趋向于Lisp模式. 二十年来,开发新编程语言的一个流行的秘决是,取C语言的计算模式,逐渐地往上加Lisp模式的特性,例如运行时类型和无用单元收集.
在这篇文章中我尽可能用最简单的术语来解释约翰麦卡锡所做的发现. 关键是我们不仅要学习某个人四十年前得出的有趣理论结果, 而且展示编程语言的发展方向. Lisp的不同寻常之处--也就是它优质的定义--是它能够自己来编写自己. 为了理解约翰麦卡锡所表述的这个特点,我们将追溯他的步伐,并将他的数学标记转换成能够运行的Common Lisp代码.
2011-07-02
ATM_Java_源代码（OOA、OOD设计模式）
面有两个帐号：
帐号：1 PIN：42
帐号：2 PIN：1234
原文是如下：
To run the simulation above, you need to do the following:
1.Click on the "ON" button (lower right-hand corner) to turn the ATM on.
2.Enter the number of $20 bills you want to have be in the cash dispenser at the start of the simulation when you are prompted to do so, and press RETURN
3.Perform any number of sessions, as follows:
1.Click on the "Click to insert card" button to simulate inserting a card
2.Type in the card number when you are prompted to do so (see below), and press RETURN
3.Enter the PIN associated with the card (see below). Although you can use your regular keyboard, it's more fun to click on the keys on the simulated ATM keyboard as displayed.
4.Perform any number of transactions, using your mouse to click the keys on the simulated ATM keyboard. Note that the machine will simulate ejecting your card when you indicate you do not wish to perform any more transactions (unless, of course, your card is retained due to too many invalid PINs).
4.Turn off the ATM by clicking on the "OFF" button (same position as the "ON" button". Note that you cannot turn the ATM off while in the middle of a customer session.
5.The entire simulation may be repeated as many times as you want, by turning the machine ON again.
For demonstration purposes, this program uses a very simple simulation of the bank, with hardwired card numbers and PIN's, etc. The following are the available cards:
Card Number PIN Available accounts
1 42 Checking account #1, Savings account #2
2 1234 Checking account #1, Money market account #3
(Note that both cards link to the same checking account)
All the features of the bank work - both current and available balances (initially the same) are maintained for each account and a $300 daily withdrawal limit per card is enforced.
2010-12-11
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