C# (CSharp) implicit_explicit_operator SpecialNumber示例

示例#1

        //overload
        public static SpecialNumber operator +(SpecialNumber sp, int num)
        {
            Console.WriteLine("always 888");
            var s = new SpecialNumber();

            s.number = 88;
            return(s);
        }

示例#2

        static void Main(string[] args)
        {
            //implicit
            //SpecialNumber sp = 500;
            //int num = sp;

            //explicit
            SpecialNumber sp  = (SpecialNumber)500;
            int           num = (int)sp;

            Console.WriteLine($"sp = {sp.number} , num = {num}");
            Console.WriteLine($"sp + num = {(int)(sp+num)}");
            Console.ReadKey();
        }