Private Access

#include <iostream>
using namespace std;

class Sensor {
private:
   int m_sensorValue;
   
public:
   int getValue(void) { return(m_sensorValue); };
   void setValue(int val) { m_sensorValue = val; }
};

int main() {
   Sensor s;
   s.setValue(75);
   cout << "Sensor value: " << s.getValue();
   return 0;
}