Lesson #2

namespace MyNamespace
{
    class Program
    {
        static void Main(string[] args)
        {
            // Types
            // 1. Value memory size
            // 9456 - 32 bits
            // int i = 4;
            // byte b = 4;

            // 2. Value kind
            // int i1 = "1"; ERROR!
            // int i2 = 4.8; ERROR!
            // 'A' => 65
            // int i3 = 'A';

            // 3. Value operators
            // int i1 = 3;
            // i1 = i1 + 32;
            // bool b1 = false;
            // b1 = !b1;
            // string str = "AZE"; // string is reference type
            // str = str * 56; ERROR
            // str = str + "RBAIJAN";

            // Value Types
            // int a = 2;
            // int b = 54;

            // 'b' assign to 'a'
            // a = b; // a = 54, b = 54
            // a = 34; // a = 34, b = 54
            // System.Console.WriteLine("b: " + b);
            /*
            MyStruct ms1 = new MyStruct();
            ms1.x = 1;
            ms1.y = 2;
            ms1.z = 3;

            MyStruct ms2 = new MyStruct();
            ms2.x = 4;
            ms2.y = 5;
            ms2.z = 6;

            ms1 = ms2; // Copy
            ms2.x = 10;
            ms2.y = 11;
            ms2.z = 12;

            System.Console.WriteLine(ms1.x);
            System.Console.WriteLine(ms1.y);
            System.Console.WriteLine(ms1.z);
            */
            /*
            // Reference Types
            MyClass mc1 = new MyClass();
            mc1.x = 1;
            mc1.y = 2;
            mc1.z = 3;

            MyClass mc2 = new MyClass();
            mc2.x = 4;
            mc2.y = 5;
            mc2.z = 6;

            mc1 = mc2; // Copy
            mc2.x = 10;
            mc2.y = 11;
            mc2.z = 12;

            System.Console.WriteLine(mc1.x);
            System.Console.WriteLine(mc1.y);
            System.Console.WriteLine(mc1.z);
            */

            // MyClass1 mc1 = new MyClass2(); // ERROR
            // MyClass2 mc2 = new MyClass1(); // ERROR
        }

        // MyClass is reference type
        class MyClass1
        {
            public int x;
            public int y, z;
        }
        class MyClass2
        {
            public int x;
            public int y, z;
        }

        // MyStruct is value type
        struct MyStruct
        {
            public int x;
            public int y, z;
        }
    }
}