Question

You have a class named AirConditioner that has a private boolean field named on. It has method named turnOn that sets the field to true and one named turnOff that set it to false. It also has a method named isOn that returns the value of the on field. Fill in the blank to complete the turnOff method.

public void turnOff() {
    ______________________
}

Answer 1

The given requirement is to fill in the blank to complete the method turnOff , So the C++ code filling the blank is below.

Note: Since the question did not specify the code fill should be in C++ or Java. i have provide both codes as screenshots below after this code section .

 void turnOff()
    {
        on =false;
        cout << "AirConditioner is set off. So the variable  on is " <<  on;
    }

Full code of C++ for your understanding below

#include <iostream>

using namespace std;
class AirConditioner
{
    private:
    
             bool on;
    public:
    void turnOff()
    {
        on =false;
        cout << "AirConditioner is set off. So the variable  on is " <<  on;
    }
    
};
int main()
{
    AirConditioner  obj;
    obj.turnOff();

    return 0;
}

Please find the screen shot of full code in C++ and output below

Please find the full code in java and output below for your understanding

public class Main
{
static class AirConditioner
{
   
   private static boolean on;
   
   public static void turnOff()
    {  
       on=false;
        System.out.println(" AirConditioner is set off. So the variable  on is "+ on);
    }
    
};

        public static void main(String[] args)
        {
            
            AirConditioner obj = new AirConditioner();
                obj.turnOff();
        }
}

Please find the screen shot of full code and output in java below