How to print a matrix of size n*n in spiral order using C#?



To rotate a matrix in spiral order, we need to do following until all the inner matrix and the outer matrix are covered −

  • Step1 − Move elements of top row

  • Step2 − Move elements of last column

  • Step3 − Move elements of bottom row

  • Step4 − Move elements of first column

  • Step5 − Repeat above steps for inner ring while there is an inner matrix

Example

 Live Demo

using System; namespace ConsoleApplication{    public class Matrix{       public void PrintMatrixInSpiralOrder(int m, int n, int[,] a){          int i, k = 0, l = 0;          while (k < m && l < n){             for (i = l; i < n; ++i){                Console.Write(a[k, i] + " ");             }             k++;             for (i = k; i < m; ++i){                Console.Write(a[i, n - 1] + " ");             }             n--;             if (k < m){                for (i = n - 1; i >= l; --i){                   Console.Write(a[m - 1, i] + " ");                }                m--;             }             if (l < n){                for (i = m - 1; i >= k; --i){                   Console.Write(a[i, l] + " ");                }                l++;             }          }       }    }    class Program{       static void Main(string[] args){          Matrix m = new Matrix();          int R = 3;          int C = 6;          int[,] aa = { { 1, 2, 3, 4, 5, 6 },             { 7, 8, 9, 10, 11, 12 },             { 13, 14, 15, 16, 17, 18 } };             m.PrintMatrixInSpiralOrder(R, C, aa);       }    } }

Output

1 2 3 4 5 6 12 18 17 16 15 14 13 7 8 9 10 11
Updated on: 2021-08-27T13:09:07+05:30

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