random_double

cpp

#include <random>
class Random {
public:
    Random(double low, double high) {
        rd = new std::random_device;
        gen = new std::mt19937((*rd)());
        dis = new std::uniform_real_distribution<double>(low, high);
    }
    ~Random() {
        delete dis;
        delete gen;
        delete rd;
    }
    
    double next() const { return (*dis)(*gen); }
    
private:
    std::random_device *rd;
    std::mt19937 *gen;
    std::uniform_real_distribution<double> *dis;
};