Passing 2d array by reference c++

template<int rows, int cols>
void print_array( int (&arr)[rows][cols] )
{
    for( int r{}; r < rows; r++ ) {
        for( int c{}; c < cols; c++ )
            std::cout << arr[r][c] << ' ';
        
        std::cout << '\n';
    }
}

Source: cplusplus.com

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