Abstract Sensor Debugging

#include <iostream>
using namespace std;

class Sensor {
public:
   virtual int readValue() const = 0; // abstract function
};

class TemperatureSensor : public Sensor {
private:
   int temperature;
public:
   TemperatureSensor(int t) : temperature(t) {}
   int readValue() const override
   {
      return temperature;
   }
};

int main() {
   int t;
   cin >> t;
   TemperatureSensor ts(t);
   Sensor* ptr = &ts;
   cout << "Temperature=" << ptr->readValue();
   return 0;
}