How do I multiply matrices in C++?

How do I multiply matrices in C++?

To multiply matrices in C++, you can use nested loops to iterate through the rows and columns. Would you like a code example?

Yes, please provide a code example.

Here's a simple example:

#include <iostream>
using namespace std;

void multiplyMatrices(int firstMatrix[10][10], int secondMatrix[10][10], int result[10][10], int rowFirst, int columnFirst, int rowSecond, int columnSecond) {
    for(int i = 0; i < rowFirst; ++i) {
        for(int j = 0; j < columnSecond; ++j) {
            result[i][j] = 0;
            for(int k = 0; k < columnFirst; ++k) {
                result[i][j] += firstMatrix[i][k] * secondMatrix[k][j];
            }
        }
    }
}

int main() {
    int firstMatrix[10][10] = {{1, 2}, {3, 4}};
    int secondMatrix[10][10] = {{5, 6}, {7, 8}};
    int result[10][10];
    multiplyMatrices(firstMatrix, secondMatrix, result, 2, 2, 2, 2);
    for(int i = 0; i < 2; ++i) {
        for(int j = 0; j < 2; ++j) {
            cout << result[i][j] << " ";
        }
        cout << endl;
    }
    return 0;
}

What if the matrices have different sizes?

If the matrices have different sizes, you need to ensure that the number of columns in the first matrix equals the number of rows in the second matrix. Otherwise, multiplication isn't possible.