Private Access

#include <iostream>

using namespace std;

class Sensor{
    private:
    int value;

    public:
    void setValue(int v){
        value = v;
    }

    int getValue(){
        return value;
    }
};

int main(){
    Sensor sensor;
    sensor.getValue();
    sensor.setValue(75);

    cout << "Sensor value: " << sensor.getValue() << endl;
    return 0;
}