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The Modern C# Challenge
The Modern C# Challenge

The Modern C# Challenge: Become an expert C# programmer by solving interesting programming problems

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The Modern C# Challenge

Geometry

This chapter includes geometric problems. Some ask you to calculate values such as π or the area below a curve. Others demonstrate useful techniques such as Monte Carlo algorithms. Finally, some are directly useful if you need to perform geometric operations such as drawing arrowheads or finding intersections between line segments.

Many of these problems have intuitive graphical purposes. In those cases, the solutions may include graphical components that draw the problem and its solution. The graphics code usually isn't necessary to solve the problems, however; it just makes visualizing the solution easier, so I won't describe that code in detail. Download the solutions to see all of the details.

Problems

Use the following problems to test your geometric programming skills. Give each problem a try before you turn to the solutions and download the example programs. If you have trouble with the graphical part, try to implement the non-graphical pieces. Then, you can download the example solutions and replace the key parts of the program with your code.

20. Monte Carlo π

A Monte Carlo algorithm uses randomness to approximate the solution to a problem. Often, using more random samples gives you a more accurate approximated solution or gives a greater probability that the solution is correct.

For this problem, use a Monte Carlo algorithm to approximate π. To do that, generate random points in the square (0 ...

Solutions

20. Monte Carlo π

The following code uses a Monte Carlo algorithm to estimate π:

// Use Monte Carlo simulation to estimate pi.
private double MonteCarloPi(long numPoints)
{
Random rand = new Random();

// Make a bitmap to show points.
int wid = pointsPictureBox.ClientSize.Width;
int hgt = pointsPictureBox.ClientSize.Height;
Bitmap bm = new Bitmap(wid, hgt);
using (Graphics gr = Graphics.FromImage(bm))
{
gr.Clear(Color.White...
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Download code icon Download Code

Key benefits

  • Gain useful insights on advanced C# programming topics and APIs
  • Use locking and cached values to solve parallel problems
  • Take advantage of .NET's cryptographic tools to encrypt and decrypt strings

Description

C# is a multi-paradigm programming language. The Modern C# Challenge covers with aspects of the .NET Framework such as the Task Parallel Library (TPL) and CryptoAPI. It also encourages you to explore important programming trade-offs such as time versus space or simplicity. There may be many ways to solve a problem and there is often no single right way, but some solutions are definitely better than others. This book has combined these solutions to help you solve real-world problems with C#. In addition to describing programming trade-offs, The Modern C# Challenge will help you build a useful toolkit of techniques such as value caching, statistical analysis, and geometric algorithms. By the end of this book, you will have walked through challenges in C# and explored the .NET Framework in order to develop program logic for real-world applications.

Who is this book for?

The Modern C# Challenge is for all C# developers of different abilities wanting to solve real-world problems. There are problems for everyone at any level of expertise in C#

What you will learn

  • Perform statistical calculations such as finding the standard deviation
  • Find combinations and permutations
  • Search directories for files matching patterns using LINQ and PLINQ
  • Find areas of polygons using geometric operations
  • Randomize arrays and lists with extension methods
  • Explore the filesystem to find duplicate files
  • Simulate complex systems and implement equality in a class
  • Use cryptographic techniques to encrypt and decrypt strings and files
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Publication date, Length, Edition, Language, ISBN-13
Publication date : Oct 25, 2018
Length: 362 pages
Edition : 1st
Language : English
ISBN-13 : 9781789535426
Vendor :
Microsoft
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Product Details

Publication date : Oct 25, 2018
Length: 362 pages
Edition : 1st
Language : English
ISBN-13 : 9781789535426
Vendor :
Microsoft
Languages :
Tools :

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Table of Contents

10 Chapters
Mathematics Chevron down icon Chevron up icon
Geometry Chevron down icon Chevron up icon
Dates and Times Chevron down icon Chevron up icon
Randomization Chevron down icon Chevron up icon
Strings Chevron down icon Chevron up icon
Files and Directories Chevron down icon Chevron up icon
Advanced C# and .NET Features Chevron down icon Chevron up icon
Simulations Chevron down icon Chevron up icon
Cryptography Chevron down icon Chevron up icon
Other Books You May Enjoy Chevron down icon Chevron up icon

Customer reviews

Rating distribution
Full star icon Full star icon Full star icon Full star icon Half star icon 4.7
(3 Ratings)
5 star 66.7%
4 star 33.3%
3 star 0%
2 star 0%
1 star 0%
mkatiehaha Sep 26, 2021
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Helpful in sharpening my C# skills
Amazon Verified review Amazon
Clock End Gooner Oct 29, 2018
Full star icon Full star icon Full star icon Full star icon Full star icon 5
I've just acquired this latest offering from Rod Stephens, and am absolutely delighted with it. The best description of this book's value I can offer is that for any developer with a solid grounding in C# will find a well organized complete and enjoyable set of coding katas. The set of programming exercises begins with implementing a class of LINQ Extension Methods based on mathematics, including Permutations, Combinations, Primality, and similar functions, working with basic .NET values such as DateTime values and string references, and later on, working with PLINQ and implementing simulations such as Conway's Game of Life, Dawkin's Weasel, as well as smaller graphically based simulations such as Space Force, an Asteroids based game, and Slingshot, using the Windows Forms classes for the graphics rendering.Each chapter for the range of .NET development topics covered are divided into Problems and Solutions, and as Stephens has done consistently over the years with his previous books and blog postings on his C# Helper website, are written in a very clear and concise manner.I would highly recommend this title to any developer who is looking to experiment and challenge their problem-solving skills and hone the edge on their C# coding skills.
Amazon Verified review Amazon
KRBOOKS Feb 21, 2019
Full star icon Full star icon Full star icon Full star icon Empty star icon 4
This book assumes you have a working knowledge of C# with each chapter having a portion that describes the problem and a portion that describes the solution. This is the first book I have read like this and it was a fairly good experience. When I first sat down with the book I grabbed a notepad and pen and scribbled out some c# pseudo code to try and work the problems then flipped over to the solutions to see if I got it correct. A couple hours later I ran out of paper :). That may not be your preferred way of interacting with the book, however if you enjoy coding puzzles or are looking for a good way to expand your c# skills, this book will do a good job of sucking you in. If you want to use pen and paper, make sure you have plenty on hand.
Amazon Verified review Amazon
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