Solution: Composite¶

Averaging (Composite) Sensor ¶

/trainings/material/soup/cxx-code/design-patterns-composite/sensors/sensor-avg.h¶

#pragma once

#include "sensor.h"

#include <vector>
#include <memory>


class AveragingSensor : public Sensor
{
public:
    AveragingSensor() = default;
    AveragingSensor(const std::initializer_list<Sensor*>&);

    void add(Sensor*);
    virtual double get_temperature() override;

private:
    std::vector<Sensor*> _sensors;
};

/trainings/material/soup/cxx-code/design-patterns-composite/sensors/sensor-avg.cpp¶

#include "sensor-avg.h"


AveragingSensor::AveragingSensor(const std::initializer_list<Sensor*>& init)
: _sensors(init) {}

void AveragingSensor::add(Sensor* sensor)
{
    _sensors.push_back(sensor);
}

double AveragingSensor::get_temperature()
{
    double sum = 0;
    int count = 0;

    for (auto s: _sensors) {
        sum += s->get_temperature();
        count++;
    }

    return sum/count;
}