Question

1) (Classes – 20 Points) Consider the following class declaration for Time to complete the questions below: DO NOT WRITE MORE THAN ASKED FOR. class Time private: int hours; int minutes; public: Time(); Time (int , int m = 0); void addMin(int m); void addHr(int h); void reset(int h = 0, int m = 0); Time operator+(const Time & t) const; Time operator-(const Time & t) const; Time operator*(double n) const; friend Time operator*(double m, const Time & t) { return t * m; } // inline definition friend std::ostream& operator<<(std::ostream& os, const Time & t); (1) (5 Points) Write the code for the functions addMin and operator+ above, as they would be defined in Time.cpp file.

Please answer all the questions thank you

Answer 1

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1) addMin and operator+ methods.

//definition for addMin() method

void Time::addMin(int min){

                //adding min to minutes

                minutes+=min;

                //checking if minutes exceed 59

                if(minutes>59){

                                //adding extra minutes that make up hour(s) to hours

                                hours+=minutes/60;

                                //removing extra minutes that make up hour(s) from minutes

                                minutes=minutes%60;

                }

}

//definition of operator+ method

Time Time::operator+(const Time &t) const{

                //creating a Time object with this object's time

                Time result(hours,minutes);

                //converting object t's time into minutes only

                int extra_minutes=t.hours*60+t.minutes;

                //adding the above minutes to result using addMin()

                result.addMin(extra_minutes);

                //returning the result

                return result;

}

2) code for testing the above two methods

int main(){

                //creating two Time objects

                Time t1(1,50);

                Time t2(2,20);

               

                //adding 25 minutes to t1 (testing addMin())

                t1.addMin(25);

                //adding t1 and t2 to get t3 (testing operator+ method)

                Time t3=t1+t2;

               

                //displaying the three times

                cout<<t1<<endl;

                cout<<t2<<endl;

                cout<<t3<<endl;

                return 0;

}

3) Option D. z is available to code that is written outside the class. This is not true because z is a private variable in Point class, which can be only accessed by member methods only. All the other options are true.