Simple question.. I think

I am VERY new to c# and am trying to make a simple program that will calculate the area of a square, triangle, or circle. The user will enter S for square T for triangle and so on.

I am trying to figure out how I can accept input for both a capital S and lower case s to represent a square. Is there a way to accept both instances of user input. Currently I have a faulty if statement.

if (userInput = 's' || 'S')


any suggestions?

Thanks

Code:

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if (userInput == 's' || userInput == 'S')

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or use .ToLower() to convert the input to lower case and then compare.

Don't forget: = is for assignment, == is for comparison.

I better way is to use switch/case:

Code:

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switch(userInput.ToLower()) {
    case 's' : DoSquareStuff(); break;
    case 't' : DoTriangleStuff(); break;
    case 'c' : DoCircleStuff(); break;
    default : Console.WriteLine("Invalid input") ; break;
}

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You can easily add more options without the clumsy if/else if/ else if, etc.

Or maybe a dictionary!

Code:

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Dictionary<char, Action> dict = new Dictionary<char, Action>();
dict.Add('s', DoSquareStuff);
dict.Add('t', DoTriangleStuff);
dict.Add('c', DoCircleStuff);

char ch = Char.ToLower(userInput);
if(dict.Keys.Contains(ch))
  dict[ch]();
else
  Console.WriteLine("You lose.");

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Quote:

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Originally Posted by itsme86

Or maybe a dictionary!

Code:

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Dictionary<char, Action> dict = new Dictionary<char, Action>();
dict.Add('s', DoSquareStuff);
dict.Add('t', DoTriangleStuff);
dict.Add('c', DoCircleStuff);

char ch = Char.ToLower(userInput);
if(dict.Keys.Contains(ch))
  dict[ch]();
else
  Console.WriteLine("You lose.");

---

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That isn't Enterprisey enough, you really ought to be using LINQ for this...

;)

You're right!

Here, I fixed it:

Code:

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    class Program
    {
        static void Main(string[] args)
        {
            char userInput = 'T';

            Regex pattern = new Regex("Do(?<letter>.).*Stuff");
            MethodInfo mInfo = typeof(Program).GetMethods(BindingFlags.Static | BindingFlags.NonPublic).FirstOrDefault(m => pattern.IsMatch(m.Name) && Char.ToLower(pattern.Match(m.Name).Groups["letter"].Value[0]) == Char.ToLower(userInput));
            if (mInfo == null)
                Console.WriteLine("You lose.");
            else
                mInfo.Invoke(null, null);
        }

        static void DoSquareStuff()
        {
            Console.WriteLine("Square stuff");
        }

        static void DoTriangleStuff()
        {
            Console.WriteLine("Triangle stuff");
        }

        static void DoCircleStuff()
        {
            Console.WriteLine("Circle stuff");
        }
    }

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Code:

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> SimpleQuestion.exe
Triangle stuff

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