Name: _____________________________

Honor Code Acknowledgment: ________________________

             Random Quiz # 10 
         CPS 08, Spring 1995
            March 1, 1995

Problem 1 : Elephants and Fences

The declaration of the ClockTime class is partially reproduced below

class ClockTime
{
  public:
    ClockTime(int h = 0, int m = 0, int s = 0);
    int Hours() const;
    int Minutes() const;
    int Seconds() const;
    ClockTime & operator +=(const ClockTime & ct);
  private:
    int hours;           
    int minutes;           // constrained: 0-59
    int seconds;           // constrained: 0-59
};


The definition ClockTime time(0,80,79); defines a variable
time whose internals are "not good", i.e., the value of
minutes will be 80 (not between 0 and 59) and the value
of seconds will be 79 (not between 0 and 59).

Write a member function Normalize that can be called to set the
values of hours, minutes, and seconds
appropriately.

For example, the constructor could be written as shown below

ClockTime::ClockTime(int h, int m, int s)
// postcondition: all data fields initialized     
{
    hours = h;
    minutes = m;
    seconds = s;
    Normalize();
}

The member function for operator += could be written as shown
below.

ClockTime & ClockTime::operator += (const ClockTime & ct)
// postcondition: add ct, return result (normalized for minutes, seconds)     
{
    seconds += ct.seconds;           // add seconds
    minutes += ct.minutes;           // add minutes
    hours +=   ct.hours;             // add hours
    Normalize();                     // fix up overflow
    
    return *this;
}

Write the function below:

    void ClockTime::Normalize()