Introduction

Rat in a maze problem，是用回溯法求解迷宫问题的经典例题。回溯法是一种优选的搜索法，根据择优的条件向前或向后搜索，最终获得目标。当向前搜索到某一步，根据目标函数得到的结果不是最优时，进行回溯，重新选择探索方向。由此得到最优解。
回溯法解决问题的基本步骤一般为：

1. 根据给定问题，定义目标函数，并保证该问题至少有一个解
2. 确定搜索的空间结构，确保回溯法可以遍历整个解空间
3. 通过深度优先算法的形式，搜素整个解空间，并通过适当剪纸来减少冗余的搜索

回溯法的一个应用场景便是解决迷宫问题。

Requirement

In this problem you will solve the “Rat in a maze problem”, using Stacks and Queues (Lectures 12-14).
The main points we shall be covering are:

1. Using Stacks and Queues in an application
2. Re-enforcement of the usage and advantages of makefiles / make utility in UNIX/Linux
3. Use of abstract data types in C++, and separate compilation
4. Use of header files and libraries for Stacks and Queues
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Introduction

Matrix和Vector是Linear algebra中最基础的概念。而利用计算机求解数学问题，是一种常见的做法。
将数学公式、定理用计算机编程实现，看起来并不是一件难事，但是对于某些算法，在不考虑时间复杂度的情况下，编写出来的代码运行效率将极其低下。尤其是I/O操作和循环结合的地方，在数据量大的情况下，往往不能快速地得到答案。因此在求解问题的过程中，对于原数学公式、定理的简化与改写，是很有必要的。
而本次作业需要在给定的时间复杂度条件下，求解一些基本的线性代数的问题。

Requirement

This assignment is to write a parallel program to multiply a matrix by a vector, and to use this routine in an implementation of the power method to find the absolute value of the largest eigenvalue of the matrix. You will write separate functions to generate the matrix and to perform the power method, and you will do some timing experiments with the power method routine.

Introduction

古典密码在密码学中，有着举足轻重的作用。做为Data security领域的基础算法理念，离不开其中的置换和置乱两大算法。
置换，即保持明文中的字符本身，但对字符的顺序进行重新排列的算法。
置乱，即将明文中的字符，用其他字符或字符序列进行替换。
而将经过加密的密文，找到其中的统计规律，并还原出其中的原文，称为密码破解。
而本次作业就是需要找到统计规律，进行密码破解。

Requirement

An encrypted file, cryptfile1.txt, is given. Your task is to decrypt it. The file was encrypted using some substitution algorithm. The easiest way to break such encryptions is by an analysis of letter frequency. You can go to the library or the Web and get information on the relative frequency of letters in the English language. A program, LetterCount.java, is also given which would allow you to find this yourself. You would simply have to choose a source text file that is sufficiently long and sufficiently representative of English that the relative frequencies of letters in it is pretty much the same as the relative frequencies given in published sources. The real value of LetterCount.java is that it provides sample code that you code adapt to decryption purposes. This encryption is simple enough that in theory you could do it by hand. If you find that your initial attempt by hand is netting nothing, you may want to write a program to help. You should hand in the results of your decryption effort.

Requirement

In this assignment, you will compare the characteristics and performance of different classifiers, namely logistic regression, k-nearest neighbours and naive Bayes. You will experiment with these extensions and extend the provided code. Note that you should understand the code first instead of using it as a black box.
Python versions of the code have been provided. You are free to work with whichever you wish.

Requirement

Prior to beginning tis assignment, please download the studentsdb.sql, studentdb.pdf and the Index.php file from the course web site.
In this assignment, you are to complete the php script, Index.php, which will use the values input by the user. This script contains one push botton and one textbox in order to perform the interaction.
The web page should provide the following functions:

1. Connect to the database
2. Check if the database connection is successful
3. Validation on user typing
4. Search and display the query result of each student
5. Error message if no student found

Requirement

In this assignment, each student is to write a program that provides a file listing for the given directory. The program should list the filename, file size, and time last modified for each file within the directory. The program should provide the user with the option to sort the listing based on filename, on file size, or on time last modified. The program should run once and quit (it does not loop).
The syntax (usage) for the program should be:

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prog_name [directory] [[-s][-t]]

where –s indicates sort by file size and –t indicates sort by time last modified. These flags are optional but mutually exclusive. The directory is also optional; if it is omitted than a default directory of “.” (the current directory) should be assumed. Every possible combination of command line arguments, from the above syntax, will be tested.

Requirement

This final project is a group project, each group should have two people. The goal of this project is to develop a java based racing game. The space racing game should provide the following functions:

1. One computer graphics environment
2. User-controlled car
3. User controlled viewpoint
4. Game AI

The racing vehicle car’s movement can be determined by its velocity and acceleration vectors.
When the user wants to turn the car, the direction of the velocity is changed based on the amount of turning the user provides.

为什么你需要编程作业代写帮助？

计算机编程一直都不是一个简单的领域，即使是对于那些痴迷于计算机编程的同学，乃至大神们，也很难掌握所有的理论和概念。但是，教授、讲师们不可能延长课时，让同学们有充分时间去领悟其中的精髓，甚至是精通计算机编程。
那有什么办法可以让同学们熟练掌握计算机编程呢？7*24的图书馆学习吗？当然不是！俗话说的好，“火车跑得快，全靠车头带”，同学们需要的是一名专业的工程师，在前方带领大家。

为什么你需要一名专业的工程师指导？

同学们寻求作业代写帮助往往有下面几个原因：没有足够的时间编程，理论概念太多需要时间梳理，不知道如何调试，无法修复Bug等等。其实这些原因并不特别，在我们工程师的日常工作中，这些也都是司空见惯的事情：项目明天要上线，技术调研需要时间整理汇总，生产环境不让调试，程序有Bug等等。当我们工程师自己解决不了的时候，也是去询问更资深的工程师，甚至专家。在他们帮忙解决问题、敲代码调试的时候，我们工程师也是坐在旁边观摩学习的。

专业工程师指导的好处有哪些？

首先，可以随时方便的获得在线帮助，尽可能专业地回答你相关领域的问题，包括理论问题、作业讲解、例题辅导，代码调试等等，甚至可以发给你参考材料的网址，省去了你在图书馆埋头的时间。
其次，专业的工程师都不会轻易放弃。对于专业的工程师来说，解决难题就是一种挑战，没有理由放弃任何难题。讲解的程序通常都是高品质的代码，结合了工程师多年的一线经验，会让你感受到醍醐灌顶，茅塞顿开的畅快。
最后，专业的工程师能快速理解需求，为每名同学量身定制最实惠的价格！

(本文出自csprojectedu.com，转载请注明出处)

Requirement

In this Assignment, you should write a class that, given a circle’s radius, has methods that return the circle’s area, diameter, and circumference.
In case you have forgotten, the equations for a circle’s area, diameter, and circumference is given below.

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area = πrr
diameter = 2r
circumference = 2πr

Based on Chapter 3, Programming Challenge # 8 Circle class in your textbook. Your output is given below.

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Enter the radius of a circle: 5.3
The circle's area is            88.2472631
The circle's diameter is        10.6
The circle's circumference is   33.300854

Write a separate class called CircleDemo with a main method that asks the user for the circle’s radius, creates a Circle object, and then reports the circle’s area, diameter, and circumference using the circle’s getter methods.

Requirement

In this Assignment, you should write a program that allows the user to perform simple arithmetic in binary. Upon starting, the program should tell the user that it is a binary math program, along with brief instructions on how to use the program.
The program should then enter a loop, where it gives a prompt, such as “input>”. Upon receiving input from the user, the program should process it, report the output result (or error), and loop back to the prompt. This should continue until the user gives the keyphrase to exit the program (keyphrase is your choice, good choices are “quit”, “end”, “exit”, etc.). For example:

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Input> 101+1100
10001
Input> 111001-1010
101111