數(shù)據(jù)異常處理。The main source file is "dabort.s": with suitable -PreDefines or
a corresponding "options-setting" file, it assembles to the data
abort veneer. This is described in detail in the documentation.
The "dabort.h" file contains definitions of some constants used
in the data abort veneer s interface to the rest of the system
- again, this is described in the documentation.
The "option.s" file is an example "options-setting" file.
Ring register[1 from 8] which seven speeds. The result is presented on 8 LEDs. After every cycle, speed grows. The process starts again after last 8 cycle.
Managing Humans is a selection of the best essays from Michael Lopps web site, Rands In Repose. Drawing on Lopp s management experiences at Apple, Netscape, Symantec, and Borland, this book is full of stories based on companies in the Silicon Valley where people have been known to yell at each other. It is a place full of dysfunctional bright people who are in an incredible hurry to find the next big thing so they can strike it rich and then do it all over again. Among these people are managers, a strange breed of people who through a mystical organizational ritual have been given power over your future and your bank account. Whether you re an aspiring manager, a current manager, or just wondering what the heck a manager does all day, there is a story in this book that will speak to you. You will learn:
* What to do when people start yelling at each other
* How to perform a diving save when the best engineer insists on resigning
* How to say "No" to the person who signs your paycheck
Playfair Cipher
1.not even the large number of keys in a monoalphabetic cipher provides security
2.one approach to improving security was to encrypt multiple letters
3.the Playfair Cipher is an example
4.invented by Charles Wheatstone in 1854,but named after his friend Baron Playfair
Playfair Key Matrix
1.a 5X5 matrix of letters based on a keyword
2.fill in letters of keyword (sans duplicates)
3.fill rest of matrix with other letters
Encrypting and Decrypting
-plaintext is encrypted two letters at a time
1. if a pair is a repeated letter, insert filler like X’
2. if both letters fall in the same row, replace each with letter to right (wrapping back to start from end)
3. if both letters fall in the same column, replace each with the letter below it (again wrapping to top from
bottom)
4. otherwise each letter is replaced by the letter in the same row and in the column of the other letter of the pair
This book has been written to support a practically oriented course in programming language
translation for senior undergraduates in Computer Science. More specifically, it is aimed at students
who are probably quite competent in the art of imperative programming (for example, in C++,
Pascal, or Modula-2), but whose mathematics may be a little weak students who require only a
solid introduction to the subject, so as to provide them with insight into areas of language design
and implementation, rather than a deluge of theory which they will probably never use again
students who will enjoy fairly extensive case studies of translators for the sorts of languages with
which they are most familiar students who need to be made aware of compiler writing tools, and to
come to appreciate and know how to use them. It will hopefully also appeal to a certain class of
hobbyist who wishes to know more about how translators work.
Very hard to design reusable Software
Design must be specific to problem on hand
Design must be general enough to address future problems and requirements
Almost impossible to do it right the first time
Experienced designers don’t reinvent the wheel
They use good solutions again and again
Find & use recurring patterns of classes &
Very hard to design reusable Software
Design must be specific to problem on hand
Design must be general enough to address future problems and requirements
Almost impossible to do it right the first time
Experienced designers don’t reinvent the wheel
They use good solutions again and again
Find & use recurring patterns of classes &
Very hard to design reusable Software
Design must be specific to problem on hand
Design must be general enough to address future problems and requirements
Almost impossible to do it right the first time
Experienced designers don’t reinvent the wheel
They use good solutions again and again
Find & use recurring patterns of classes &
Very hard to design reusable Software
Design must be specific to problem on hand
Design must be general enough to address future problems and requirements
Almost impossible to do it right the first time
Experienced designers don’t reinvent the wheel
They use good solutions again and again
Find & use recurring patterns of classes &
A java program asking the user to enter a date, the program will calculate the julian date, and take the julian date to return it to a gregorian date again.
