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  1.  
  2. import java.io.*;
  3. class GFG {
  4.     // Function to print Matrix
  5.     static void printMatrix(int M[][], int rowSize,
  6.                             int colSize)
  7.     {
  8.         for (int i = 0; i < rowSize; i++) {
  9.             for (int j = 0; j < colSize; j++)
  10.                 System.out.print(M[i][j] + " ");
  11.  
  12.             System.out.println();
  13.         }
  14.     }
  15.  
  16.     // Function to multiply
  17.     // two matrices A[][] and B[][]
  18.     static void multiplyMatrix(int row1, int col1,
  19.                                int A[][], int row2,
  20.                                int col2, int B[][])
  21.     {
  22.         int i, j, k;
  23.  
  24.         // Print the matrices A and B
  25.         System.out.println("\nMatrix A:");
  26.         printMatrix(A, row1, col1);
  27.         System.out.println("\nMatrix B:");
  28.         printMatrix(B, row2, col2);
  29.  
  30.         // Check if multiplication is Possible
  31.         if (row2 != col1) {
  32.  
  33.             System.out.println(
  34.                 "\nMultiplication Not Possible");
  35.             return;
  36.         }
  37.  
  38.         // Matrix to store the result
  39.         // The product matrix will
  40.         // be of size row1 x col2
  41.         int C[][] = new int[row1][col2];
  42.  
  43.         // Multiply the two matrices
  44.         for (i = 0; i < row1; i++) {
  45.             for (j = 0; j < col2; j++) {
  46.                 for (k = 0; k < row2; k++)
  47.                     C[i][j] += A[i][k] * B[k][j];
  48.             }
  49.         }
  50.  
  51.         // Print the result
  52.         System.out.println("\nResultant Matrix:");
  53.         printMatrix(C, row1, col2);
  54.     }
  55.  
  56.     // Driver code
  57.     public static void main(String[] args)
  58.     {
  59.  
  60.         int row1 = 4, col1 = 3, row2 = 3, col2 = 4;
  61.  
  62.         int A[][] = { { 1, 1, 1 },
  63.                       { 2, 2, 2 },
  64.                       { 3, 3, 3 },
  65.                       { 4, 4, 4 } };
  66.  
  67.         int B[][] = { { 1, 1, 1, 1 },
  68.                       { 2, 2, 2, 2 },
  69.                       { 3, 3, 3, 3 } };
  70.  
  71.         multiplyMatrix(row1, col1, A, row2, col2, B);
  72.     }
  73. }
Success #stdin #stdout 0.13s 53636KB
comments (?)
stdin 
Standard input is empty
stdout 
Matrix A:
1 1 1 
2 2 2 
3 3 3 
4 4 4 

Matrix B:
1 1 1 1 
2 2 2 2 
3 3 3 3 

Resultant Matrix:
6 6 6 6 
12 12 12 12 
18 18 18 18 
24 24 24 24
https://ideone.com/hqvMtP
language:
Java (HotSpot 12)
created:
1 day ago
visibility:
public

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