如何实现两个二维数组相乘用C++

如何编写，使用C++，#include<iostream.h>

怎么相乘，按照矩阵相乘吗

#include <iostream>
using namespace std;

void mul_array_2d(float** a,int a_row,int a_col,float** b,int b_row,int b_col,float** result_array)
{

    if (a_col != b_row)
    {
        cout << "两个矩阵的大小不匹配，无法相乘" << endl;
    }
    else
    {
        for (int i = 0; i < a_row; i++)
        {
            for (int j = 0; j < b_col; j++)
            {
                for (int k = 0; k < a_col; k++)
                {
                    //result_array[i][j] += a[i][k] * b[k][i];
                    //a[i][j]=a[i*n+j]
                    //result_array[i * a_row + j] += a[i * a_col + k] * b[k * b_col + i];
                    *((float*)result_array + i * a_row + j) += *((float*)a + i * a_col + k) * *((float*)b + k * b_col + j);
                }
            }
        }
    }    
}


int main()
{
    float w[2][3] = {{1,2,3},{4,5,6}};
    float x[3][2] = { {1,2},{3,4},{5,6} };
    //cout << shape << endl;
    float wx[2][2] = { 0};


    mul_array_2d((float**)w,2,3, (float**)x,3,2, (float**)wx);
    

    for (int i = 0; i < 2; i++)
    {
        cout << endl;
        for (int j = 0; j < 2; j++)
        {
            cout << wx[i][j] << " ";
        }
    }
    
    return 0;
}