Chapter 13, Problem 8SA

Explanation of Solution

The class dateType has a friend function declared in its definition. The friend function is then defined with two parameters of dateType and a bool return type. The logic of the function is explained with the in-lined comments in the program given below.

//class definition

class dateType

{

    //declare the friend function in the class definition

    friend bool before(dateType d1, dateType d2);

    public:

        void setDate(int month, int day, int year);

        int getDay() const;

        int getMonth() const;

        int getYear() const;

        void printDate() const;

        bool isLeapYear(int) const;

        dateType(int month = 1, int day = 1, int year = 1900);

    private:

        int dMonth; //variable to store the month

        int dDay; //variable to store the day

        int dYear; //variable to store the year

};

//define the friend function

bool before(dateType d1, dateType d2){

    //if the year of first object is strictly less

    //than the year of second object return true

    //else if the year of the first object is

    //strictly more than the year of the second

    //object return false else if there is a tie

    //then compare the months

    if (d1...