Math Challange

Let's continue coding...

#01 Before we start new stuff we have to make some cleanings:

Extract all the logic to separate method (Run())

Create a separate class for the logic

using System;

namespace AbcItNetFramework
{
            internal class Program
    {

            static void Main()
        {
            // Console.WriteLine("Hello ABC IT!");
            //Console.ReadKey(true);

            TimeCounter.Run();
        }
    }

            internal class TimeCounter
    { 
            private const string EndProgram = "end";
            private static readonly DateTime startTime = new DateTime();

            public static void Run()
        {
            Console.WriteLine("Welcome to the Time Counter. Please enter the time in HH:MM:SS format and pres ENTER...");

            var result = startTime;

            while (true)
            {
            try
                {
            var userInput = Console.ReadLine();

            if (EndProgram.Equals(userInput, StringComparison.InvariantCultureIgnoreCase))
                    {
                        Console.WriteLine("... Press any key to close the window ...");
                        Console.ReadKey(true);
            break;
                    }

                    result = CountResult(result, userInput);

                    DisplayResult(result);
                }
            catch (Exception ex)
                {
                    Console.WriteLine(ex.Message);
                    DisplayResult(result);
                }
            }
        }

            private static DateTime CountResult(DateTime result, string userInput)
        {
            var timeParts = userInput.Split(':');

            var hours = int.Parse(timeParts[0]);
            var minuts = int.Parse(timeParts[1]);

            if (minuts > 59 || minuts < 0)
            {
            throw new Exception("The max value of minuts is 59");
            }

            var seconds = int.Parse(timeParts[2]);

            if (seconds > 59 || minuts < 0)
            {
            throw new Exception("The max value of seconds is 59");
            }

            result = result.AddHours(hours);
            result = result.AddMinutes(minuts);
            result = result.AddSeconds(seconds);
            return result;
        }

            private static void DisplayResult(DateTime result)
        {
            var realResult = result - startTime;
            Console.ForegroundColor = ConsoleColor.Red;
            Console.WriteLine($"{Math.Floor(realResult.TotalHours):00}:{realResult.Minutes:00}:{realResult.Seconds:00}");
            Console.ResetColor();
        }
    }
}

Create a new folder for exercises

Move the new created class in a separate file

Move the new created file into the folder

Now create a new class called "MathChallange" directly in a "Excercises" folder

Now we have a brand new class prepared

#01 Add some implementation

using System;

namespace AbcItNetFramework.Exercises
{
            internal class MathChallange
    {
            public static void Run()
        {
            Console.WriteLine("Hello from MathChallange class!");
            Console.ReadKey(true);
        }
    }
}

#02 Call it from the Program/Main() method

using AbcItNetFramework.Exercises;

namespace AbcItNetFramework
{
            internal class Program
    {

            static void Main()
        {
            // Console.WriteLine("Hello ABC IT!");
            // Console.ReadKey(true);

            // TimeCounter.Run();

            MathChallange.Run();
        }
    }
}

Objective of this program is to create a tool to test (your) math skills

#03 Create some math exercises

using System;

namespace AbcItNetFramework.Exercises
{
            internal class MathChallange
    {
            public static void Run()
        {
            Random random = new Random();

            do
            {
            int value1 = random.Next(1, 99);
            int value2 = random.Next(1, 99);

                Console.WriteLine($"{value1} + {value2} = ?");
                Console.ReadKey(true);
            }
            while (true);
        }
    }
}

#04 Get the user input and evaluate it

using System;

namespace AbcItNetFramework.Exercises
{
            internal class MathChallange
    {
            public static void Run()
        {
            Random random = new Random();

            do
            {
            int value1 = random.Next(1, 99);
            int value2 = random.Next(1, 99);

                Console.WriteLine($"{value1} + {value2} = ?");

            var line = Console.ReadLine();
            var parse = int.TryParse(line, out var response);

            if (!parse || value1 + value2 != response)
                {
                    Console.ForegroundColor = ConsoleColor.Red;
                    Console.WriteLine("KO");
                }
            else
                {
                    Console.ForegroundColor = ConsoleColor.Green;
                    Console.WriteLine("OK");
                }

                Console.ResetColor();
            }
            while (true);
        }
    }
}

#05 Works? Greate - but... Let's improve it a bit

Instad of infinit loop will have just - say - 10 exercises to begin with

using System;

namespace AbcItNetFramework.Exercises
{
            internal class MathChallange
    {
            public static void Run()
        {
            Random random = new Random();

            for (int i = 0; i < 10; i++)
            {
            int value1 = random.Next(1, 99);
            int value2 = random.Next(1, 99);

                Console.WriteLine($"{value1} + {value2} = ?");

            var line = Console.ReadLine();
            var parse = int.TryParse(line, out var response);

            if (!parse || value1 + value2 != response)
                {
                    Console.ForegroundColor = ConsoleColor.Red;
                    Console.WriteLine("KO");
                }
            else
                {
                    Console.ForegroundColor = ConsoleColor.Green;
                    Console.WriteLine("OK");
                }

                Console.ResetColor();
            }
        }
    }
}

#06 Count the number of right / wrong answers

using System;

namespace AbcItNetFramework.Exercises
{
            internal class MathChallange
    {
            public static void Run()
        {
            Random random = new Random();
            var rightAnswers = 0;
            var wrongAnswers = 0;

            for (int i = 0; i < 10; i++)
            {
            int value1 = random.Next(1, 99);
            int value2 = random.Next(1, 99);

                Console.WriteLine($"{value1} + {value2} = ?");

            var line = Console.ReadLine();
            var parse = int.TryParse(line, out var response);

            if (!parse || value1 + value2 != response)
                {
                    Console.ForegroundColor = ConsoleColor.Red;
                    Console.WriteLine("KO");
                    wrongAnswers++;
                }
            else
                {
                    Console.ForegroundColor = ConsoleColor.Green;
                    Console.WriteLine("OK");
                    rightAnswers++;
                }

                Console.ResetColor();
            }

            Console.WriteLine($"OK: {rightAnswers}x");
            Console.WriteLine($"KO: {wrongAnswers}x");
            Console.ReadKey(true);
        }
    }
}

#07 Make user choose number of excercies

using System;

namespace AbcItNetFramework.Exercises
{
            internal class MathChallange
    {
            public static void Run()
        {
            Console.WriteLine("Welcome to the Math Test Application");
            Console.WriteLine("Set the number of exercises:");

            string exercisesNumber = Console.ReadLine();

            if (!int.TryParse(exercisesNumber, out var problemsCount))
            {
                problemsCount = 10;
                Console.WriteLine("Your choise was not valid - the value was set to 10!");
            }

            Random random = new Random();
            var rightAnswers = 0;
            var wrongAnswers = 0;

            for (int i = 0; i < problemsCount; i++)
            {
            int value1 = random.Next(1, 99);
            int value2 = random.Next(1, 99);

                Console.WriteLine($"{value1} + {value2} = ?");

            var line = Console.ReadLine();
            var parse = int.TryParse(line, out var response);

            if (!parse || value1 + value2 != response)
                {
                    Console.ForegroundColor = ConsoleColor.Red;
                    Console.WriteLine("KO");
                    wrongAnswers++;
                }
            else
                {
                    Console.ForegroundColor = ConsoleColor.Green;
                    Console.WriteLine("OK");
                    rightAnswers++;
                }

                Console.ResetColor();
            }

            Console.WriteLine($"OK: {rightAnswers}x");
            Console.WriteLine($"KO: {wrongAnswers}x");
            Console.ReadKey(true);
        }
    }
}

#08 We don't need store the wrong answers count - we can count it

using System;

namespace AbcItNetFramework.Exercises
{
            internal class MathChallange
    {
            public static void Run()
        {
            Console.WriteLine("Welcome to the Math Test Application");
            Console.WriteLine("Set the number of exercises:");

            string exercisesNumber = Console.ReadLine();

            if (!int.TryParse(exercisesNumber, out var problemsCount))
            {
                problemsCount = 10;
                Console.WriteLine("Your choise was not valid - the value was set to 10!");
            }

            Random random = new Random();
            var rightAnswers = 0;

            for (int i = 0; i < problemsCount; i++)
            {
            int value1 = random.Next(1, 99);
            int value2 = random.Next(1, 99);

                Console.WriteLine($"{value1} + {value2} = ?");

            var line = Console.ReadLine();
            var parse = int.TryParse(line, out var response);

            if (!parse || value1 + value2 != response)
                {
                    Console.ForegroundColor = ConsoleColor.Red;
                    Console.WriteLine("KO");
                }
            else
                {
                    Console.ForegroundColor = ConsoleColor.Green;
                    Console.WriteLine("OK");
                    rightAnswers++;
                }

                Console.ResetColor();
            }

            Console.WriteLine($"OK: {rightAnswers}x");
            Console.WriteLine($"KO: {problemsCount - rightAnswers}x");
            Console.ReadKey(true);
        }
    }
}

#09 Improve evaluation

using System;

namespace AbcItNetFramework.Exercises
{
            internal class MathChallange
    {
            public static void Run()
        {
            Console.WriteLine("Welcome to the Math Test Application");
            Console.WriteLine("Set the number of exercises:");

            string exercisesNumber = Console.ReadLine();

            if (!int.TryParse(exercisesNumber, out var problemsCount))
            {
                problemsCount = 10;
                Console.WriteLine("Your choise was not valid - the value was set to 10!");
            }

            Random random = new Random();
            var rightAnswers = 0;

            for (int i = 0; i < problemsCount; i++)
            {
            int value1 = random.Next(1, 99);
            int value2 = random.Next(1, 99);

                Console.WriteLine($"{value1} + {value2} = ?");

            var line = Console.ReadLine();
            var parse = int.TryParse(line, out var response);

            if (!parse || value1 + value2 != response)
                {
                    Console.ForegroundColor = ConsoleColor.Red;
                    Console.WriteLine("KO");
                }
            else
                {
                    Console.ForegroundColor = ConsoleColor.Green;
                    Console.WriteLine("OK");
                    rightAnswers++;
                }

                Console.ResetColor();
            }

            string evaluation = EvaluateChallange(problemsCount, rightAnswers);

            Console.WriteLine();
            Console.WriteLine($"{evaluation} - all done with score {rightAnswers} / {problemsCount}");
            Console.ReadKey(true);
        }

            private static string EvaluateChallange(int problemsCount, int rightAnswers)
        {
            var score = rightAnswers == 0
                ? 0
                : (int)((decimal)rightAnswers / problemsCount * 10);

            string evaluation;

            switch (score)
            {
            case 10:
                    evaluation = "Excellent";
            break;
            case 9:
            case 8:
                    evaluation = "Spectacular";
            break;
            case 7:
            case 6:
                    evaluation = "Good";
            break;
            case 5:
            case 4:
                    evaluation = "Poor";
            break;
            default:
                    evaluation = "Are you joking?";
            break;
            }

            return evaluation;
        }

    }
}

#10 Clean code a bit - extract methods

using System;

namespace AbcItNetFramework.Exercises
{
            internal class MathChallange
    {
            public static void Run()
        {
            int problemsCount = GetTheNumberOfExercises();

            Random random = new Random();
            var rightAnswers = 0;

            for (int i = 0; i < problemsCount; i++)
            {
                rightAnswers = ProcessExcercise(random, rightAnswers);
            }

            string evaluation = EvaluateChallange(problemsCount, rightAnswers);

            Console.WriteLine();
            Console.WriteLine($"{evaluation} - all done with score {rightAnswers} / {problemsCount}");
            Console.ReadKey(true);
        }

            private static int GetTheNumberOfExercises()
        {
            Console.WriteLine("Welcome to the Math Test Application");
            Console.WriteLine("Set the number of exercises:");

            string exercisesNumber = Console.ReadLine();

            if (!int.TryParse(exercisesNumber, out var problemsCount))
            {
                problemsCount = 10;
                Console.WriteLine("Your choise was not valid - the value was set to 10!");
            }

            return problemsCount;
        }

            private static int ProcessExcercise(Random random, int rightAnswers)
        {
            int value1 = random.Next(1, 99);
            int value2 = random.Next(1, 99);

            Console.WriteLine($"{value1} + {value2} = ?");

            var line = Console.ReadLine();
            var parse = int.TryParse(line, out var response);

            if (!parse || value1 + value2 != response)
            {
                Console.ForegroundColor = ConsoleColor.Red;
                Console.WriteLine("KO");
            }
            else
            {
                Console.ForegroundColor = ConsoleColor.Green;
                Console.WriteLine("OK");
                rightAnswers++;
            }

            Console.ResetColor();
            return rightAnswers;
        }

            private static string EvaluateChallange(int problemsCount, int rightAnswers)
        {
            var score = rightAnswers == 0
                ? 0
                : (int)((decimal)rightAnswers / problemsCount * 10);

            string evaluation;

            switch (score)
            {
            case 10:
                    evaluation = "Excellent";
            break;
            case 9:
            case 8:
                    evaluation = "Spectacular";
            break;
            case 7:
            case 6:
                    evaluation = "Good";
            break;
            case 5:
            case 4:
                    evaluation = "Poor";
            break;
            default:
                    evaluation = "Are you joking?";
            break;
            }

            return evaluation;
        }

    }
}