Simple Inheritance

#include <iostream>
using namespace std;

class Device {
public:
   void printType(void) { cout << "Generic Device" << endl; };
};

class Sensor: public Device {
public:
   void printSensor(void) { cout << "Sensor Device" << endl; };
};

int main() {
   Sensor s;
   s.printType();    // inherited method
   s.printSensor();  // derived method
   return 0;
}