#include <iostream>
#include <random>
#include <iomanip>
using namespace std;
using box_t = pair<int*, const size_t>;
class Array {
public:
    static void fill(box_t& box, const int a, const int b) {
        auto[sequence, length] = box;
        for (auto i = 0U; i < length; ++i) sequence[i] = generate(a, b);
    }
    static void show(const box_t& box, const streamsize width = 2U) {
        auto[sequence, length] = box;
        for (auto i = 0U; i < length; ++i) cout << setw(width) << sequence[i];
        cout.put('\n');
    }
    static void replace(box_t& box, const int dest, const int src) {
        auto[sequence, length] = box;
        for (auto i = 0U; i < length; ++i) if (sequence[i] == dest) sequence[i] = src;
    }
private:
    static int generate(int a, int b) {
        if (a > b) swap(a, b);
        const uniform_int_distribution<> uid(a, b);
        random_device rd;
        mt19937 gen(rd());
        return uid(gen);
    }
};
int main() {
    int sequence[10U];
    box_t box{ sequence, size(sequence) };
    Array::fill(box, 7, 14);
    Array::show(box, 4U);
    Array::replace(box, 7, 0);
    Array::show(box, 4U);
    system("pause");
}