using System;

public class Program

{

    public static void Main()

    {

        double d1 = 1.000000000000002;

        double d2 = 1.000000000000003;

        double d3 = 1.000000000000005;

        if (d1 == d2) Console.WriteLine("Both dobule numbers are represented with the same bit combination");

        Console.WriteLine("d1 = " + d1);

        Console.WriteLine("d2 = " + d2);

        Console.WriteLine("d3 = " + d3);

        //Lab07

        //1. Can you use the switch statement for a double type?

        //Ans) No, I cannot use the switch statement for a double type. As shown in the above example,

        //double variables are inprecise. Looking the result from if statement, d1 and d2 are not the same, but on the console we see the same value.

        //Also, the output of d3 is explicitly wrong.

        //Switch statements are about precise matching. Therefore, it makes no sense to match one inprecise value on another inprecise value. 

        //Hence, we cannot use switch statement for a double type.

        /*Below codes - doesn't work

        switch (d1)

        {

            case 1:

                Console.WriteLine("Pass first case");

                break;

            case 1.000000000000002:

                Console.WriteLine("Pass second case");

                break;

            default:

                Console.WriteLine("Unknown");

                break;

        }

        int num = 2;

        switch (num)

            {

                case 0:

                    Console.WriteLine("Pass 1 case");

                    break;

                case 2.1:

                    Console.WriteLine("Pass 2 case");

                    break;

                case 3:

                    Console.WriteLine("Pass 3 case");

                    break;

                default:

                    Console.WriteLine("Unknown");

                    break;

            }

        */

        //2. Can you have duplicate cases in a switch?

        //No, you cannot have duplicate cases in a switch

        //I tried to test if it is possible with below code but got an error

        //"The switch statement contains multiple cases with the label value "Blue""

        /*

        string strColor = "Blue";

        switch (strColor)

            {

                case "Blue":

                    Console.WriteLine("Pass 1 case");

                    break;

                case "Blue":

                    Console.WriteLine("Pass 2 case");

                    break;

                case "Green":

                    Console.WriteLine("Pass 3 case");

                    break;

                default:

                    Console.WriteLine("Unknown");

                    break;

            }*/

​

        //3.Can you use a variable in the case? what if instead of "case 0:", you have

        //"case x:" where x is a variable?\

        //No, as I can see in below example, I cannot use variable in the case.

        //A constant value is expected.

        /*

        int v1 = 0;

        int v2 = 1;

        int num = 2;

        switch (num)

            {

                case v1:

                    Console.WriteLine("Pass 1 case");

                    break;

                case v2:

                    Console.WriteLine("Pass 2 case");

                    break;

                case 3:

                    Console.WriteLine("Pass 3 case");

                    break;

                default:

                    Console.WriteLine("Unknown");

                    break;

            }*/

        //4. Write the following program on the next slide in dotnetfiddle.net, save it as Lab7 there. Share 

        //that link on Canvas.

        Console.WriteLine("Enter your major: ");

        string major = Console.ReadLine();

        Console.WriteLine("Enter your score in a whole number between 0 and 100: ");

        string score = Console.ReadLine();

        double dScore = double.Parse(score);

        //validate the score is a whole number ranging between 0 and 100

        if (dScore == 0 || dScore % 1 == 0) {

            if (dScore <= 100 && dScore >= 0) {

                if (dScore >= 90) {

                    Console.WriteLine("You get A");

                    if (major == "Information Systems") {

                        Console.WriteLine("Congratulations! You are one of the best students in IS.");

                    }

                    else {

                        Console.WriteLine("Congratulations! You are one of the best students.");

                    }

            }

                else if (dScore <=89 && dScore>=80) {

                    Console.WriteLine("You get B");}

                else if (dScore <= 79 && dScore >= 70) {

                    Console.WriteLine("You get C");}

                else if (dScore <= 69 && dScore >= 60) {

                    Console.WriteLine("You get D");}

                else {

                    Console.WriteLine("You get F");

                }

            }

            else {

                Console.WriteLine("Error: enter your score between 0 and 100");

            }

        }

    else {

        Console.WriteLine("Error: enter your score in a whole number");

    }

    }

}

​