How do you dynamically allocate a matrix?

Question

How do you dynamically allocate a 2D matrix in C++? I have tried based on what I already know:

#include 

int main(){
    int rows;
    int c         


        

Answer 1

Try boost::multi_array

#include 

int main(){
    int rows;
    int cols;
    boost::multi_array arr(boost::extents[rows][cols] ;
}