namespace Ch04Q02
{
    /// <summary>
    /// Summary description for Class1.
    /// </summary>
    class Class1
    {
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main(string[] args)
        {
            int myInt1,myInt2;

            Console.WriteLine("Please enter an integer:");
            do
            {
                myInt1 = Convert.ToInt32(Console.ReadLine());
                Console.WriteLine("Now enter another integer:");
                myInt2 = Convert.ToInt32(Console.ReadLine());
                if (myInt1>10 && myInt2>10)
                    Console.WriteLine("Both numbers must be less then 10!\nPlease enter you first number again.");
            }
            while (myInt1>10 && myInt2>10);

            Console.WriteLine("Sum of ints<10? {0}", (myInt1 + myInt2) < 10);
            Console.WriteLine("Sum of ints between 0 and 5? {0}", 
                (0 <= myInt1 + myInt2) && (myInt1 + myInt2 <= 5));
            Console.WriteLine("Bitwise AND of int sum and 10 = {0}", myInt1 + myInt2 & 10);
        }
    }
}

using System;

namespace Ch04Q04
{
    /// <summary>
    /// Summary description for Class1.
    /// </summary>
    class Class1
    {
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main(string[] args)
        {
            double realCoord, imagCoord;
            double realTemp, imagTemp, realTemp2, arg;
            double realMin=-0.6,realMax=1.77,imagMin=-1.2,imagMax=1.2;        //limits
            double realInc=0.03,imagInc=0.05;                                //increments
            //get limits
            Console.WriteLine("Please enter the min Real coord {0}:",realMin);
            realMin=Convert.ToDouble(Console.ReadLine());
            Console.WriteLine("Please enter the max Real coord {0}:",realMax);
            realMax=Convert.ToDouble(Console.ReadLine());
            Console.WriteLine("Please enter the min Imaginary coord {0}:",imagMin);
            imagMin=Convert.ToDouble(Console.ReadLine());
            Console.WriteLine("Please enter the max Imaginary coord {0}:",imagMax);
            imagMax=Convert.ToDouble(Console.ReadLine());
            //work out inc's
            imagInc=(imagMax-imagMin)/48;
            realInc=(realMax-realMin)/78;  //uh why not 79??

            int iterations;
            for (imagCoord=imagMax;imagCoord>=imagMin;imagCoord-=imagInc)
            {
                for (realCoord=realMin; realCoord<=realMax;realCoord+=realInc)
                {
                    iterations=0;
                    realTemp=realCoord;
                    imagTemp=imagCoord;
                    arg=(realCoord*realCoord)+(imagCoord*imagCoord);
                    while((arg<4)&&(iterations<40))
                    {
                        realTemp2=(realTemp*realTemp)-(imagTemp*imagTemp)-realCoord;
                        imagTemp=(2*realTemp*imagTemp)-imagCoord;
                        realTemp=realTemp2;
                        arg=(realTemp*realTemp)+(imagTemp*imagTemp);
                        iterations+=1;
                    }
                    switch (iterations %4)
                    {
                        case 0:
                            Console.Write(".");
                            break;
                        case 1:
                            Console.Write("o");
                            break;
                        case 2:
                            Console.Write("O");
                            break;
                        case 3:
                            Console.Write("x");
                            break;
                    }
                }
                Console.Write("\n");
            }
            Console.ReadLine();
        }
    }
}