Private Access

#include <iostream>
using namespace std;

class Sensor {
private:
   int v;
public:

   void setValue(int value){
      v = value;
   }
   int getValue(){
      return v;
   }
};

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