// Fig. 7.11: Scope.cs
// Scope class demonstrates instance and local variable scopes.
using System;

public class scope
{
    // instance variable that is accessible to all methods of this class 
    private int x = 1;

    // method Begin creates and initializes local variable x 
    // and calls methods UseLocalVariable and UseInstanceVariable
    public void Begin()
    {
        int x = 5; // method's local variable x hides instance variable x

        Console.WriteLine("local x in method Begin is {0}", x);

        // UseLocalVariable has its own local x
        UseLocalVariable();

        // UseInstanceVariable uses class Scope's instance variable x
        UseInstanceVariable();

        // UseLocalVariable reinitializes its own local x
        UseLocalVariable();

        // class Scope's instance variable x retains its value
        UseInstanceVariable();

        Console.WriteLine("\nlocal x in method Begin is {0}", x);
    } // end method Begin

    // create and initialize local variable x during each call
    public void UseLocalVariable()
    {
        int x = 25; // initialized each time UseLocalVariable is called

        Console.WriteLine(
           "\nlocal x on entering method UseLocalVariable is {0}", x);
        ++x; // modifies this method's local variable x
        Console.WriteLine(
           "local x before exiting method UseLocalVariable is {0}", x);
    } // end method UseLocalVariable

    // modify class Scope's instance variable x during each call
    public void UseInstanceVariable()
    {
        Console.WriteLine("\ninstance variable x on entering {0} is {1}",
           "method UseInstanceVariable", x);
        x *= 10; // modifies class Scope's instance variable x
        Console.WriteLine("instance variable x before exiting {0} is {1}",
           "method UseInstanceVariable", x);
    } // end method UseInstanceVariable
} // end class Scope