Answered: Create an interface named ITurnable…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

in C# i need to

Create an application named TurningDemo that creates instances of four classes: Page, Corner, Pancake, and Leaf.

Create an interface named ITurnable that contains a single method named Turn(). The classes named Page, Corner, Pancake, and Leaf implement ITurnable.

Create each class’s Turn() method to display an appropriate message. For example:

The Page’s Turn() method should display You turn a page in a book.
The Corner’s Turn() method should display You turn corners to go around the block.
The Pancake's Turn() method should display You turn a pancake when it's done on one side.
The Leaf's Turn() method should display A leaf turns colors in the fall.

but I keep getting errors witch are

Unit Test

Incomplete

Build Status

Build Failed

Build Output

Compilation failed: 3 error(s), 0 warnings

NtTest930946e3.cs(12,26): error CS0246: The type or namespace name `ITurnable' could not be found. Are you missing `TurningDemo' using directive?

NtTest930946e3.cs(23,7): error CS0246: The type or namespace name `Page' could not be found. Are you missing `TurningDemo' using directive?

NtTest930946e3.cs(24,7): error CS0841: A local variable `page' cannot be used before it is declared

Unit Test

Incomplete

Leaf class defined

Build Status

Build Failed

Build Output

Compilation failed: 3 error(s), 0 warnings

NtTest5641c024.cs(12,26): error CS0246: The type or namespace name `ITurnable' could not be found. Are you missing `TurningDemo' using directive?

NtTest5641c024.cs(23,7): error CS0246: The type or namespace name `Leaf' could not be found. Are you missing `TurningDemo' using directive?

NtTest5641c024.cs(24,7): error CS0841: A local variable `leaf' cannot be used before it is declared

Unit Test

Incomplete

Pancake class defined

Build Status

Build Failed

Build Output

Compilation failed: 3 error(s), 0 warnings

NtTest7a68f19c.cs(12,26): error CS0246: The type or namespace name `ITurnable' could not be found. Are you missing `TurningDemo' using directive?

NtTest7a68f19c.cs(23,7): error CS0246: The type or namespace name `Pancake' could not be found. Are you missing `TurningDemo' using directive?

NtTest7a68f19c.cs(24,7): error CS0841: A local variable `pancake' cannot be used before it is declared

Unit Test

Incomplete

Corner class defined

Build Status

Build Failed

Build Output

Compilation failed: 3 error(s), 0 warnings

NtTest54ce730f.cs(12,26): error CS0246: The type or namespace name `ITurnable' could not be found. Are you missing `TurningDemo' using directive?

NtTest54ce730f.cs(23,7): error CS0246: The type or namespace name `Corner' could not be found. Are you missing `TurningDemo' using directive?

NtTest54ce730f.cs(24,7): error CS0841: A local variable `corner' cannot be used before it is declared

my code is

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace TurningDemo

{

public interface ITurnable

{

string Turn();

}

class Page : ITurnable

{

public string Turn()

{

return "You turn a page in the book.";

}

class Corner : ITurnable

{

public string Turn()

{

return "You turn at the corner.";

}

class Pancake : ITurnable

{

public string Turn()

{

return "You turn a pancake.";

}

class Leaf : ITurnable

{

public string Turn()

{

return "A leaf turns colors in the fall.";

}

class Program

{

static void Main(string[] args)

{

Page page1 = new Page();

Corner corner1 = new Corner();

Pancake pancake1 = new Pancake();

Leaf leaf1 = new Leaf();

Console.WriteLine("Page: " + page1.Turn());

Console.WriteLine("Corner: " + corner1.Turn());

Console.WriteLine("Pancake: " + pancake1.Turn());

Console.WriteLine("Leaf: " + leaf1.Turn());

Console.ReadLine();

}

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