clocktype.h

C++编成数据结构与程序设计方法 D.S.Malk编著

//clockType.h, the specification file for the class clockType

class clockType
{
public:
    void setTime(int hours, int minutes, int seconds);
      //Function to set the time.
      //The time is set according to the parameters.
      //Postcondition: hr = hours; min = minutes; 
      //               sec = seconds;
      //               The function checks whether the 
      //               values of hours, minutes, and seconds 
      //               are valid. If a value is invalid, the 
      //               default value 0 is assigned.

    void getTime(int& hours, int& minutes, int& seconds) const;
      //Function to return the time.
      //Postcondition: hours = hr; minutes = min;
      //               seconds = sec;

    void printTime() const;
      //Function to print the time.
      //Postcondition: The time is printed in the form
      //               hh:mm:ss.

    void incrementSeconds();
      //Function to increment the time by one second.
      //Postcondition: The time is incremented by one second.
      //               If the before-increment time is 
      //               23:59:59, the time is reset to 00:00:00.

    void incrementMinutes();
      //Function to increment the time by one minute.
      //Postcondition: The time is incremented by one minute. 
      //               If the before-increment time is 
      //               23:59:53, the time is reset to 00:00:53.

    void incrementHours();
      //Function to increment the time by one hour.
      //Postcondition: The time is incremented by one hour.
      //               If the before-increment time is 
      //               23:45:53, the time is reset to 00:45:53.

    bool equalTime(const clockType& otherClock) const;
      //Function to compare the two times.
      //Postcondition: Returns true if this time is equal to 
      //               otherClock; otherwise, returns false.

    clockType(int hours, int minutes, int seconds);
      //Constructor with parameters
      //The time is set according to the parameters.
      //Postcondition: hr = hours; min = minutes; 
      //               sec = seconds;
      //               The constructor checks whether the 
      //               values of hours, minutes, and seconds 
      //               are valid. If a value is invalid, the 
      //               default value 0 is assigned.

    clockType();
      //Default constructor
      //The time is set to 00:00:00.
      //Postcondition: hr = 0; min = 0; sec = 0;

private:
    int hr;  //variable to store the hours
    int min; //variable to store the minutes
    int sec; //variable to store the seconds
};