Console Application Pizza Slices [closed]

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I am writing a program that allows user to enter the diameter of a pizza and the program calculates how many slices the pizza will give you. Here is my code so far.

 //DECLARATION OF VARIABLES
        string Diameter = null;           //The diameter of the pizza which the user will enter
        int Slices;                       //The number of slices the user will get
        const double SliceSize = 14.125;  //The area of each slice of pizza
        double Radius;                    //The radius of the pizza
        double Area;                      //The area of the pizza


        //INPUT
        Console.WriteLine("Enter diameter of pizza:");
        Diameter = Console.ReadLine();
        double Diameter1 = Convert.ToDouble(Diameter);

        //PROCESS
        Radius = Diameter1 / 2;
        Area = Math.PI*Math.Pow(Radius,2);
        Slices = (int)(Area / SliceSize);

        //OUTPUT
        Console.Wr开发者_高级运维iteLine("A Diameter\" pizza will yeild {0:n0} slices", Slices);


        // END - pause the program so the user can read the output and waits for user to press any key to exit the console
        Console.WriteLine("\n\nPress any key to exit...");
        Console.ReadKey();

How do I round up the output and how to I reference the diameter of the pizza diameter in the output writeline?

---

• As @GeorgeDuckett mentioned, you're not setting radius, thus, you're getting an error that says Use of unassigned local variable 'radius'
• You're attempting to divide two doubles and store the result in an int slices = area/pizzaslice; so you get the error Cannot implicitly convert type 'double' to 'int'. An explicit conversion exists (are you missing a cast?).

The error list is your friend. Read the errors & Google them if you don't understand what they mean.

---

You don't set the radius variable anywhere. You should be using decimal.Parse to set it.

Console.WriteLine("Enter diameter of pizza:"); 

diasize = Console.ReadLine();
var radius = 0;    
if (decimal.TryParse(diasize, out radius))
{
    radius =/ 2;
}

You also need change slices = area/pizzaslice; to slices = (int)(area/pizzaslice); since slices is an integer and the result of area/pizzaslice is a double.

---

Others have already ointed out some of your coding errors. You also have logic errors. Have a careful look at these two lines:

radius = Math.Pow(radius,2)*Math.PI;
radius /= 2;

What are you trying to do here? What are you actually doing?

Remember the formulas for the diameter and area of a circle:

diameter = 2 * radius

area = pi * radius^2

Now go back and look again at what your code is doing.

---

//DECLARATION OF VARIABLES
        string Diameter = null;           //The diameter of the pizza which the user will enter
        int Slices;                       //The number of slices the user will get
        const double SliceSize = 14.125;  //The area of each slice of pizza
        double Radius;                    //The radius of the pizza
        double Area;                      //The area of the pizza


        //INPUT
        Console.Write("Enter diameter of pizza: ");
        Diameter = Console.ReadLine();
        double Diameter1 = Convert.ToDouble(Diameter);

        //PROCESS
        Radius = Diameter1 / 2;
        Area = Math.PI*Math.Pow(Radius,2);
        Slices = (int)Math.Round(Area / SliceSize);

        //OUTPUT
        Console.WriteLine("A " + Diameter + "\" pizza will yeild {0:n0} slices", Slices);


        // END - pause the program so the user can read the output and waits for user to press any key to exit the console
        Console.WriteLine("\n\nPress any key to exit...");
        Console.ReadKey();