Programming Challenge 14.4 - NumDays Class

Example Files: NumDaysClass.7z

NumDaysClass.h

#ifndef NUM_DAYS_H_
#define NUM_DAYS_H_

class NumDays
{
private:
    double workHours;            // To hold a number of hours

public:
    NumDays(double hours = 0.0)       
    {    workHours = hours; }

    void setHours(double hours)       
    { workHours = hours; }

    void print();

    double getHours() const
    { return workHours; }

    double getDays() const
    { return workHours / 8; }

    // Overloaded operator functions
    NumDays operator + (const NumDays &);                // Overloaded +
    NumDays operator - (const NumDays &);                // Overloaded -
    NumDays operator ++();                                    // Overloaded Prefix ++                       
    NumDays operator ++(int);                                // Overloaded Postfix ++
    NumDays operator --();                                    // Overloaded Prefix --
    NumDays operator --(int);                                // Overloaded Postfix --
};

#endif

NumDaysClass.cpp

#include "NumDays.h"

#include <iostream>
using std::cout;

/* **********************************************************
            NumDays NumDays::operator +(const obj &)
   ********************************************************** */

NumDays NumDays::operator + (const NumDays &right)
{
    NumDays temp;
   
    temp.workHours = (workHours + right.workHours);

    return temp;
}

/* **********************************************************
            NumDays NumDays::operator -(const obj &)
   ********************************************************** */

NumDays NumDays::operator - (const NumDays &right)
{
    NumDays temp;

    if (workHours < right.workHours)
    {
        temp.workHours = (right.workHours - workHours);
    }
    else
    {
        temp.workHours = (workHours - right.workHours);
    }
    return temp;
}

/* **********************************************************
            NumDays NumDays::operator ++() : Prefix ++
   ********************************************************** */

NumDays NumDays::operator ++()
{
    return ++workHours;
}

/* **********************************************************
            NumDays NumDays::operator ++(int) : Postfix ++
   ********************************************************** */

NumDays NumDays::operator ++(int)
{
    return workHours++;
}

/* **********************************************************
            NumDays NumDays::operator --() : Prefix --
   ********************************************************** */

NumDays NumDays::operator --()
{
    return --workHours;
}

/* **********************************************************
            NumDays NumDays::operator --(int) : Postfix --
   ********************************************************** */

NumDays NumDays::operator --(int)
{
    return workHours--;
}

/* **********************************************************
            NumDays::print()
    Outputs the hour(s) and day(s) worked to screen.
   ********************************************************** */

void NumDays::print()
{
    cout << "Total: " << (getHours()) << " hour(s) or "
          << getDays() << " day(s).\n\n";
}

NumDaysDm.cpp

#include "NumDays.h"

#include <iomanip>
using std::fixed;
using std::showpoint;
using std::setprecision;

#include <iostream>
using std::cin;
using std::cout;

int main()
{
    NumDays thisWeek(26);
    NumDays lastWeek(15);
    NumDays total;

    cout << "YAMAGATA 4th JUNIOR HIGH SCHOOL BIWEEKLY WORKSHEET SUMMARY\n\n";

    // Demonstrating the overloaded postfix ++, -- operators
    cout << fixed << showpoint << setprecision(2);
    cout << "You worked " << thisWeek.getHours() << " hour(s) in total this week.\n";
    cout << "This makes " << thisWeek.getDays() << " day(s) of work.\n\n";

    cout << "We increased this amount by 1 hour\n";
    thisWeek++;
    thisWeek.print();

    cout << "We detucted 1 hour from this amount\n";
    thisWeek--;
    thisWeek.print();

    // Demonstrating the overloaded prefix ++, --, + and - operators
    cout << "You worked " << lastWeek.getHours() << " hour(s) in total last week.\n";
    cout << "This makes " << lastWeek.getDays() << " day(s) of work.\n\n";

    cout << "We increased this amount by 1 hour\n";
    ++lastWeek;
    lastWeek.print();

    cout << "We detucted 1 hour from this amount\n";
    --lastWeek;
    lastWeek.print();

    cout << "This week and last week you worked\n";
    total = thisWeek + lastWeek;
    total.print();

    cout << "The difference in hours and days is\n";
    total = thisWeek - lastWeek;
    total.print();

    cin.get();
    cin.ignore();
    return 0;
}

Example Output: