C++ Matrix Allocation, Printing, Deallocation example

#include <cstdint>
#include <iostream>

constexpr uint32_t M_ROWS = 5, M_COLS = 5;

uint32_t** reserve_matrix(uint32_t const rows, uint32_t const cols) {
    uint32_t** m = new uint32_t*[rows];
    for (std::size_t i{0}; i < rows; ++i) {
        m[i] = new uint32_t[cols];
    }

    return m;
}

void free_matrix(uint32_t** m, uint32_t const rows) {
    for(std::size_t i{0}; i < rows; ++i) {
        delete[] m[i];
    }
    delete[] m;
}

void populate_matrix(uint32_t** m, uint32_t const rows, uint32_t const cols) {
    for(std::size_t j{0}; j < rows; ++j) {
        for(std::size_t i{0}; i < cols; ++i) {
            m[j][i] = j+i;
        }
    }
}

void print_matrix(uint32_t** m, uint32_t const rows, uint32_t const cols) {
    for(std::size_t j{0}; j < rows; ++j) {
        for(std::size_t i{0}; i < cols; ++i) {
            std::cout << m[j][i] << " ";
        }
        std::cout <<"\n";
    }
}

int main() {
    uint32_t** m = reserve_matrix(M_ROWS, M_COLS);
    populate_matrix(m, M_ROWS, M_COLS);
    print_matrix(m, M_ROWS, M_COLS);
    free_matrix(m, M_ROWS);
}