Unlock the Power of Matrix Multiplication in C++

Getting Started with the Basics

To tackle this example, you’ll need a solid grasp of fundamental C++ concepts, including:

• arrays
• multidimensional arrays
• passing arrays to functions
• looping structures (for, while, and do…while)

A Matrix Multiplication Program Like No Other

Imagine a program that asks users to input the size of a matrix, comprising rows and columns. Next, it prompts users to enter the elements of two separate matrices. Finally, it multiplies these matrices and displays the result in a seamless operation.

The Magic Happens with Three Essential Functions

To achieve this feat, our program relies on three crucial functions:

1. Gathering Matrix Elements from UsersThis function collects input from users, ensuring that the matrices are populated with the correct data.

   void getMatrixElements(int** matrix, int rows, int cols) {
     for (int i = 0; i < rows; i++) {
       for (int j = 0; j < cols; j++) {
         std::cin >> matrix[i][j];
       }
     }
   }

2. Multiplying Two MatricesThis function performs the actual matrix multiplication, leveraging C++’s powerful arithmetic capabilities.

   void multiplyMatrices(int** matrixA, int** matrixB, int** result, int rowsA, int colsA, int colsB) {
     for (int i = 0; i < rowsA; i++) {
       for (int j = 0; j < colsB; j++) {
         for (int k = 0; k < colsA; k++) {
           result[i][j] += matrixA[i][k] * matrixB[k][j];
         }
       }
     }
   }

3. Displaying the Resultant MatrixThis function showcases the resulting matrix, providing users with a clear and concise output.

   void displayMatrix(int** matrix, int rows, int cols) {
     for (int i = 0; i < rows; i++) {
       for (int j = 0; j < cols; j++) {
         std::cout << matrix[i][j] << " ";
       }
       std::cout << std::endl;
     }
   }

Experience the Power of Matrix Multiplication

Take a look at the example output below to see the program in action:

Enter the number of rows for matrix A: 2
Enter the number of columns for matrix A: 3
Enter elements of matrix A:
1 2 3
4 5 6

Enter the number of rows for matrix B: 3
Enter the number of columns for matrix B: 2
Enter elements of matrix B:
7 8
9 10
11 12

Resultant Matrix:
58 64
139 154

With these essential functions working in harmony, you’ll be able to harness the full potential of matrix multiplication in C++.