Сформировать массив из элементов матрицы - C++ - Ответ 1937781

#include <iostream>
#include <algorithm>
#include <functional>
#include <boost/multi_array.hpp>
#include <boost/random.hpp>
#include <boost/array.hpp>
#include <boost/bind.hpp>
#include <boost/function.hpp>
 
const int ROWS = 5;
const int COLS = 3;
 
boost::mt19937 rng;
boost::uniform_int <> range(0, 100);
boost::variate_generator <boost::mt19937, boost::uniform_int <> > gen(rng, range);
 
struct GenerateMatrix {
    int operator()() {
       return gen(); 
    }
};
 
typedef boost::multi_array <int, 2> Array2D;
 
 
struct GetArray {
    GetArray(Array2D::array_view <1>::type* _views, int _number) : views(_views), number(_number), index(-1) {  }
    int operator()() {
        this->index++;
        return std::count_if(this->views[this->index].begin(), this->views[this->index].end(), std::bind2nd(std::greater<int>(), this->number));
    }
 
private:
    Array2D::array_view <1>::type* views;
    int number, index;
};
 
int main() {
    typedef boost::multi_array_types::index_range range;
    Array2D matrix(boost::extents[ROWS][COLS]);
    boost::array <int, COLS> result_array;
    boost::multi_array_ref <int, 1> matrix_ref(matrix.data(), boost::extents[matrix.num_elements()]);
    int number = 60;
    
    std::generate(matrix_ref.begin(), matrix_ref.end(), GenerateMatrix());
    
    Array2D::array_view <1>::type views[COLS] = {
        matrix[boost::indices[range()][0]],
        matrix[boost::indices[range()][1]],
        matrix[boost::indices[range()][2]]
    };
 
    std::generate(result_array.begin(), result_array.end(), GetArray(views, number));
    
    std::cout << "Matrix: " << std::endl;
    for (std::size_t i = 0; i != matrix.size(); ++i) {
        std::copy(matrix[i].begin(), matrix[i].end(), std::ostream_iterator <int>(std::cout, "\t"));
        std::cout << '\n';
    }
    std::cout << "Final array: " << std::endl;
    std::copy(result_array.begin(), result_array.end(), std::ostream_iterator <int>(std::cout, "\t"));
    
    return 0;
}