C++ clock and delta time

clock.cpp

#include "clock.h"

#include <chrono>

Clock::Clock() : lastTick { std::chrono::steady_clock::now() }, deltaTime { 0 }
{
}

void Clock::tick()
{
    using namespace std::chrono;

    auto now { steady_clock::now() };
    duration<float> elapsed { lastTick - now };
    deltaTime = elapsed.count();
    lastTick = now;
}

float Clock::getDeltaTime() const { return deltaTime; }

clock.h

#ifndef CLOCK_H
#define CLOCK_H

#include <chrono>

class Clock
{
public:
    Clock();

    /**
     * @brief Updates clock one tick.
     */
    void tick();

    /**
     * @brief Gets delta time.
     * @return delta time.
     */
    float getDeltaTime() const;

private:
    std::chrono::steady_clock::time_point lastTick {};
    float deltaTime {};
};

#endif