использование одномерных массивов

#include <iostream>
#include <time.h>
using namespace std;
 
int main()
{
int const x = 5;
int A[x];
int B[x];
 
srand(time(NULL));
 
for (int i = 0; i < x; i++)
A[i] = rand() % 8 + 4;
 
for (int i = 0; i < x; i++)
{
if (i == x - 1)
B[i] = A[0];
else
B[i] = A[i + 1];
}
 
cout << "A: "; 
for (int i = 0; i < x; i++)
cout << A[i] << " ";
cout << endl;
cout << "B: ";
for (int i = 0; i < x; i++)
cout << B[i] << " ";
cout << endl;
 
system("pause");
}

#include <iostream>
#include <vector>
#include <iterator>
#include <algorithm>
#include <ctime>
#include <boost/random/mersenne_twister.hpp>
#include <boost/random/uniform_int_distribution.hpp>
 
void gen_(std::vector<int>& vec, int a, int b)
{
    boost::random::mt19937 gen;
    gen.seed(static_cast<unsigned> (std::time(0)));
    boost::random::uniform_int_distribution<> dist(a, b);
    std::generate(std::begin(vec), std::end(vec), [&] () { return dist(gen); });;
}
 
int main()
{
   std::vector<int> v(5);
   gen_(v, 4, 11);
   std::copy(std::begin(v), std::end(v), std::ostream_iterator<int> (std::cout, " ")); 
   std::cout << std::endl;
   std::rotate(std::begin(v), std::begin(v) + 1, std::end(v));
   std::copy(std::begin(v), std::end(v), std::ostream_iterator<int> (std::cout, " ")); 
   std::cout << std::endl;   
}