Qt封装C++11 随机数

头文件：#include <random>

dkrandom.h

#ifndef DKRANDOM_H
#define DKRANDOM_H

#include <QObject>
#include <random>
#include <ctime>

class DKRandom : public QObject
{
    Q_OBJECT
public:
    explicit DKRandom(QObject* parent = nullptr);
    int random(int min, int max);
    double random(double min, double max);
private:
    std::default_random_engine m_engine;

};

#endif // DKRANDOM_H

dkrandom.cpp

#include "dkrandom.h"

DKRandom::DKRandom(QObject* parent) : QObject(parent), m_engine(time(nullptr))
{

}

int DKRandom::random(int min, int max)
{
    std::uniform_int_distribution<> dis(min, max);
    int ret = dis(m_engine);
    return ret;
}

double DKRandom::random(double min, double max)
{
    std::uniform_real_distribution<> dis(min, max);
    double ret = dis(m_engine);
    return ret;
}

调用代码

    DKRandom r;
    for(int i = 0; i < 10; i++)
    {
        qDebug() << r.random(0, 100) << endl;
        qDebug() << r.random(0.0, 1.0) << endl;
    }