int类型各位数累加

        /// <summary>计算int类型各位数累加之和（1）</summary>
        static int Calc1(int i)
        {
            int result = 0;
            var array = i.ToString().ToCharArray();
            foreach (var item in array)
            {
                result += Convert.ToInt32(item);
            }
            return result;
        }

        /// <summary>计算int类型各位数累加之和（2）</summary>
        static int Calc2(int i)
        {
            int result = 0;
            while (i > 0)
            {
                result += i % 10;
                i /= 10;
            }
            return result;
        }