using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication9
{
    class Program
    {
        static int maxvalue(int[] intarray)
        {
            ];
            ; i < intarray.Length; i++)
            {
                if (maxval<intarray[i])
                {
                    maxval = intarray[i];
                }
            }
            return maxval;
        }
        static void Main(string[] args)
        {
            , , , , , , , , , , , , ,  };
            int a = maxvalue(array);
            Console.WriteLine("该数组最大值为{0}", a);
            Console.ReadKey();
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication10
{
    class Program
    {
        static int sumvalus(params int[] vals)
        {
            ;
            ; i < vals.Length; i++)
            {
                sum += vals[i];
            }
            return sum;
        }
        static void Main(string[] args)
        {
            , , , , , , , ,  };
            int sum = sumvalus(array);
            Console.WriteLine("数组之和为{0}", sum);
            Console.ReadKey();
        }
    }
}