选择排序

 int[] array = { 5,4,3,1,2};//1 4 3 2 5//1 2 3 4 5 

           
            for (int i = 0; i < array.Length; i++)
            {
                int min = array[i];
                int index = i;
                for (int j = i+1; j < array.Length ; j++)
                {
                    if (array[j] < min)
                    {
                        index = j;
                        min = array[j];
                    }
                }

                int temp;
                temp = array[i];
                array[i] = min;
                array[index] = temp;
            }