#include <iostream>
#include <cstdlib>
#include <ctime>

#define DIV (rand() - 1) / 32766.0      // defining a macro - everytime when we put DIV, it's replaced by this formula (rand() - 1) / 32766.0

using namespace std;

int main()
{
    srand(time(nullptr));

    double x = DIV;
    cout << x << endl;
    return 0;
}