Trying to make a Simple User input to character output Console program

Question

I have looked really hard on this. Integers seem easy, but this is what I have been trying to figure out in C# in visual studio.

I want to have a user input of a letter like "a" then the console writes "apple", b=bobby, c=charlie, etc. and when they don't put a letter then it gives an error message like "no letters used". I am not sure if I am suppose to convert the user input from a string with ToChar or what the best way to do this is. I haven't gotten into arrays yet and haven't figured out the switch command with characters (instead of integers or strings).

This is how I was trying to do it:

Console.WriteLine("Enter a letter ");
choice = Convert.ToChar(Console.ReadLine());

if (char choice = 'a'){
    Console.WriteLine("apple");

}else if (char choice = 'b'{
    Console.WriteLine("bobby");
}else if (char choice = 'b'{
    Console.WriteLine("bobby");
}else (char choise=!IsLetter){
    Console.WriteLine("No Letters entered");

Racil Hilan · Accepted Answer · 2015-09-21 13:42:36Z

2

If you want to stick to if else, here is what you can do:

if (choice == 'a')
{
    Console.WriteLine("apple");
}
else if (choice =='b')
{
    Console.WriteLine("bobby");
}
else if (char choice = 'c')
{
    Console.WriteLine("charlie");
}
else
{
    Console.WriteLine("No Letters entered");
}

You don't need to put condition on your else anymore :)

edited Sep 21, 2015 at 13:42

Racil Hilan

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answered Sep 21, 2015 at 3:16

BourneShady

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1 Comment

DDJ Over a year ago

This helped me see the whole context of how to use If Else - Thanks!

WKara · Accepted Answer · 2015-09-21 00:18:59Z

2

Use a switch statement, probably best for your scenario

static void Main(string[] args)
    {
        //initialise bool for loop
        bool flag = false;

        //While loop to loop Menu
        while (!flag)
        {
            Console.WriteLine("Menu Selection");
            Console.WriteLine("Press 'a' for apple");
            Console.WriteLine("Press 'b' for bobby");
            Console.WriteLine("Type 'exit' to exit");

            //Read userinput
            //Store inside string variable
            string menuOption = Console.ReadLine();

            switch (menuOption)
            {
                case "a":
                    //Clears console for improved readability
                    Console.Clear();
                    //"\n" Creates empty line after statement
                    Console.WriteLine("apple has been selected\n");
                    //Break out of switch
                    break;
                case "b":
                    Console.Clear();
                    Console.WriteLine("bobby has been selected\n");
                    break;
                case "exit":
                    Console.Clear();
                    Console.WriteLine("You will now exit the console");
                    //bool set to false to exit out of loop
                    flag = true;
                    break;
                    //Catch incorrect characters with default
                default:
                    Console.Clear();
                    //Error message
                    Console.WriteLine("You have not selected an option\nPlease try again\n\n");
                    break;
            } 
        } 


        Console.ReadLine();

answered Sep 21, 2015 at 0:18

WKara

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3 Comments

DDJ Over a year ago

Thank you and everyone for their comments. This really helped clarify some things. So it basically does just stay a string.

DDJ Over a year ago

The only thing I was questioning and pondering over for a while is the !flag command. I was thinking !flag should be if bool flag = not false. But would this mean that it is already true? Or does it imply that it just isn;t active until it is true?

WKara Over a year ago

The flag is set true by default. U could do the opposite what I have done and initialise the flag as true then just take the "!" out of the while condition. Then set the flag to false in the "exit" case to exit out the loop

Racil Hilan · Accepted Answer · 2015-09-23 16:07:16Z

0

This is how you write it using a switch:

switch (choice){
case 'a':
    Console.WriteLine("apple");
    break;
case 'b':
    Console.WriteLine("bobby");
    break;
case 'c':
    Console.WriteLine("charlie");
    break;
default:
    Console.WriteLine("No Letters entered");
    break;
}

edited Sep 23, 2015 at 16:07

answered Sep 20, 2015 at 23:56

Racil Hilan

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