IComparable

public class Program

    {

       static void Main(String[] args)

        {

            var myInt = new[] { 20, 4, 5, 1, 6 };

            Array.Sort(myInt);

            foreach (var i in myInt)

                Console.WriteLine("{0}", i);

            Console.ReadLine();



        }

    }

/* Array类的sort方法其实依靠一个叫做IComparable的接口！

public interface IComparable

{

    int CompareTo(object obj);

}

 

sort 使用的算法依赖于元素的CompareTo方法来决定两个元素的次序。int类型实现了IComparable！*/



class Program

    {

        static void Main(string[] args)

        {int i,j,t;

         var myInt = new[] { 20, 4, 5, 1, 6};

         for (i = 0; i <myInt.Length-1; i++)

          for (j = 0; j < myInt.Length - 1-i; j++)

              if (myInt[j].CompareTo(myInt[j + 1]) > 0)//myInt[j].CompareTo(myInt[j+1])<0则为降序排序，正好相反的！

            {  t=myInt[j];

               myInt[j] = myInt[j+1];

               myInt[j + 1] = t;

              

            }

         for (i = 0; i <myInt.Length; i++)

             Console.WriteLine("{0}", myInt[i]);

         Console.ReadLine();

           

        }

    }