using System;
namespace Lesson
{
    class Program
    {
        static void SumAndAvg(params int[] num)
        {
            if (num.Length == 0)
            {
                Console.WriteLine("没有东西");
                return;
            }
            else
            {
                int sum = 0, avg;
                for (int i = 0; i < num.Length; i++)
                {
                    sum += num[i];
                }
                avg = sum / num.Length;
                Console.WriteLine("总和为:" + sum);
                Console.WriteLine("平均为:" + avg);
            }
            
        }

        static void Calc(params int[] arr)
        {
            if(arr.Length == 0)
            {
                Console.WriteLine("没有东西");
                return;
            }
            else
            {
                int sum1 = 0, sum2 = 0;
                for (int i = 0; i < arr.Length; i++)
                {
                    if (arr[i] % 2 == 0)
                    {
                        sum1 += arr[i];
                    }
                    else
                    {
                        sum2 += arr[i];
                    }
                }
                Console.WriteLine("奇数合:"+sum2);
                Console.WriteLine("偶数合:"+sum1);
            }
        }
        static void Main(string[] args)
        {
            SumAndAvg();
            SumAndAvg(1,2,3,4,5,6,7,8,9,10);
            Calc();
            Calc(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
        }
    }
}