コード例 #1
0
        static void Main(string[] args)
        {
            //var number = 0;
            //var count = 10;
            //var totalPrice = 20.99f;
            //double total = 30.45;
            //var character = 'a';
            //string example = "string";
            //bool isTrue = false;
            //Console.WriteLine(number);
            //Console.WriteLine(totalPrice);
            //Console.WriteLine(character);
            //Console.WriteLine(example);

            //Console.WriteLine("{0} {1}", byte.MinValue, byte.MaxValue);

            //int i = 1;
            //byte b = (byte)i;

            //Console.WriteLine(b);

            //var bumber = "1234";
            //int i = Convert.ToInt32(bumber);

            //try
            //{
            //    var num = "1234";
            //    int b = Convert.ToByte(num);
            //}
            //catch (Exception)
            //{

            //    Console.WriteLine("Number cannot be converted");
            //}

            var john = new Person();

            john.firstName = "John";
            john.lastName  = "Smith";

            john.Introduce();

            Calculator c = new Calculator();

            c.Add(2, 3);

            //var number = new int[3];

            //number[0] = 1;
            //Console.WriteLine(number[0]);
            //Console.WriteLine(number[1]);
            //Console.WriteLine(number[2]);

            //var number = new string[3];

            //number[0] = "test";
            //Console.WriteLine(number[0]);
            //Console.WriteLine(number[1]);
            //Console.WriteLine(number[2]);

            var fn = "Joshua";
            var ln = "Fernandes";

            var name = new string[2] {
                fn, ln
            };

            Console.WriteLine(string.Format("My Name is {0} {1}", fn, ln));
            Console.WriteLine(string.Join(",", name));

            Console.WriteLine("==========ENUM===========");
            Console.WriteLine("Enum", EnumExample.example1, EnumExample.example2, EnumExample.example3);
            var method = EnumExample.example3;

            Console.WriteLine((int)method);

            var methodID = 3;

            Console.WriteLine((EnumExample)methodID);
            Console.WriteLine(EnumExample.example3.ToString());

            //Parsing
            var newMethod = "example1";
            var newEnum   = (EnumExample)Enum.Parse(typeof(EnumExample), newMethod);

            Console.WriteLine(newEnum);

            Console.WriteLine("==========================");

            Console.WriteLine("\n\n");

            Console.WriteLine("============Ref and Value Types==============");
            var a = 10;
            var b = a;

            ++a;

            Console.WriteLine("a:{0},b:{1}", a, b);

            var array1 = new int[3] {
                1, 2, 3
            };
            var array2 = array1;

            array2[0] = 0;

            Console.WriteLine("arr1[0]={0} , arr2[0]={1}", array1[0], array2[0]);

            Console.WriteLine("=============================================");

            Console.WriteLine("===================CONDITIONS===================");
            var cond = new Conditions();

            cond.GetDay();
            cond.GetPrice();
            cond.GetSeason(Conditions.Season.Winter);

            Console.WriteLine("===================EXERCISE 1===================");
            var ex1 = new IsValidNumber();

            ex1.CheckNumber();
        }
コード例 #2
0
        static void Main(string[] args)
        {
            Console.WriteLine("Hello World!");

            var person = new Person();

            person.FirstName  = "Mistu";
            person.SecondName = "Pratikbhai Prajapati";
            person.Introduce();

            Calculator calculator = new Calculator();
            int        result     = calculator.Add(2, 2);

            Console.WriteLine("Add method Result is: " + result);

            // int[] Numbers = new int[3];
            var Numbers = new int[3];

            Numbers[0] = 10;
            Console.WriteLine(Numbers[0]);
            Console.WriteLine(Numbers[1]);
            Console.WriteLine(Numbers[2]);

            var Flags = new bool[3];

            Flags[0] = true;
            Console.WriteLine(Flags[0]);
            Console.WriteLine(Flags[1]);
            Console.WriteLine(Flags[2]);

            string path = @"c:\projects\sandeep\files"; // verbatim string

            Console.WriteLine(path);


            var method = ShippingMethod.Express;

            Console.WriteLine((int)method);

            var methodId = 3;

            Console.WriteLine((ShippingMethod)methodId);
            Console.WriteLine(method.ToString());

            // we have string -> enum

            var methodName = "Express";
            // parsing
            var shippingmethod = (ShippingMethod)Enum.Parse(typeof(ShippingMethod), methodName);

            Console.WriteLine(shippingmethod);

            //copying value type and reference type
            var a = 10;         // integers are value type
            var b = a;

            b++;
            Console.WriteLine(string.Format("a: {0} & b: {1}", a, b));

            var array1 = new int[] { 1, 2, 3 }; // array are object in C#, hence they are called reference type
            var array2 = array1;

            array2[0] = 0;
            Console.WriteLine("array1[0]: {0} & array2[0]: {1}", array1[0], array2[0]);

            int number = 1;

            Increment(number);
            Console.WriteLine(number);

            var person1 = new Person()
            {
                Age = 30
            };

            Console.WriteLine(person1.Age);
            AgeNumber(person1);
            Console.WriteLine(person1.Age);

            Console.Read();
        }