#include <iostream>
#include <ctime>
#include <cstdio>
#include <cstdlib>
using namespace std;

void los(double *tab, int n) {
  srand(time(0));
  for (int i = 0; i < n; i++) {
    *(tab + i) = (double)rand() / RAND_MAX * 2 - 1;
  }
}

   int main()
   {
    double tab[10];
    los(tab, 10);
    for (int i = 0; i < 10; i++) {
        cout << tab[i] << endl;
    }
    return 0;
    }