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  1. using System;
  2.  
  3. class MatrixMultiplication
  4. {
  5.     static void Main()
  6.     {
  7.         int[,] A = {
  8.             {1, 2, 3},
  9.             {4, 5, 6},
  10.             {7, 8, 9}
  11.         };
  12.  
  13.         int[,] B = {
  14.             {9, 8, 7},
  15.             {6, 5, 4},
  16.             {3, 2, 1}
  17.         };
  18.  
  19.         int[,] C = new int[3, 3];
  20.  
  21.         // Multiply matrices A × B and store in C
  22.         for (int i = 0; i < 3; i++)         // O(n)
  23.         {
  24.             for (int j = 0; j < 3; j++)     // O(n)
  25.             {
  26.                 C[i, j] = 0;
  27.                 for (int k = 0; k < 3; k++) // O(n)
  28.                 {
  29.                     C[i, j] += A[i, k] * B[k, j];
  30.                 }
  31.             }
  32.         }
  33.  
  34.         // Print result
  35.         Console.WriteLine("Result of A × B:");
  36.         for (int i = 0; i < 3; i++)
  37.         {
  38.             for (int j = 0; j < 3; j++)
  39.             {
  40.                 Console.Write(C[i, j] + "\t");
  41.             }
  42.             Console.WriteLine();
  43.         }
  44.     }
  45. }
  46.  
Success #stdin #stdout 0.06s 28552KB
comments (?)
stdin 
45
stdout 
Result of A × B:
30	24	18	
84	69	54	
138	114	90
https://ideone.com/UY9bqH
language:
C# (NET 6.0)
created:
8 days ago
visibility:
public

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