矩阵螺旋输出

 

 class Program
    {
        static void Main(string[] args)
        {
            //数组arr是一个n*n的二维数组
            int n = 5, m = 10;
            int[,] arr = new int[n, n];
            for (int i = 0; i < n; i++)
            {
                for (int j = 0; j < n; j++)
                {
                    arr[i, j] = m++;
                }
            }
            Console.WriteLine();
            Console.WriteLine();
            for (int i = 0; i < n; i++)
            {
                for (int j = 0; j < n; j++)
                {
                    Console.Write("  ");
                    Console.Write(arr[i, j]);
                }
                Console.WriteLine();
                Console.WriteLine();
            }

            OutputMatrix(arr, n);
            Console.ReadLine();
        }
        static void OutputMatrix(int[,] arr, int n)
        {

            int row = 0, col = 0, circle = 0, sum = Convert.ToInt32(Math.Floor(Convert.ToDouble(n / 2)));
            StringBuilder str = new StringBuilder();
            while (circle < sum + 1)
            {
                for (; row < n - circle; row++)
                    str.Append(arr[row, col].ToString() + ",");
                row--;
                col++;
                for (; col < n - circle; col++)
                    str.Append(arr[row, col].ToString() + ",");
                row--;
                col--;
                for (; row >= circle; row--)
                    str.Append(arr[row, col].ToString() + ",");
                row++;
                col--;
                for (; col > circle; col--)
                    str.Append(arr[row, col].ToString() + ",");
                row++;
                col++;

                circle++;
            }
            Console.WriteLine("  "+str.ToString());
        }
    }

效果图：

当然还有另一种形式的输入方法:

class Program
    {
        static void Main(string[] args)
        {
            //数组arr是一个n*n的二维数组
            int n = 5, m = 10;
            int [,] arr=new int [n,n];
            int row = 0, col = 0, circle = 0, sum = Convert.ToInt32(Math.Floor(Convert.ToDouble(n / 2)));
            while (circle < sum + 1)
            {
                for (; row < n - circle; row++)
                    arr[row, col] = m++;
                row--;
                col++;
                for (; col < n - circle; col++)
                    arr[row, col] = m++;
                row--;
                col--;
                for (; row >= circle; row--)
                    arr[row, col] = m++;
                row++;
                col--;
                for (; col > circle; col--)
                    arr[row, col] = m++;
                row++;
                col++;

                circle++;
            }
          
            Console.WriteLine();
            Console.WriteLine();
            for (int i = 0; i < n; i++)
            {
                for (int j = 0; j < n; j++)
                {
                    Console.Write("      ");
                    Console.Write(arr[i, j]);
                }
                Console.WriteLine();
                Console.WriteLine();
            }
            Console.ReadLine();
        }
    }

效果图：