Question

Design a class called NumDays. The class’s purpose is to store a value that represents a number of work hours and convert it to a number of days. For example, 8 hours would be converted to 1 day, 12 hours would be converted to 1.5 days, and 18 hours would be converted to 2.25 days. The class should have a constructor that accepts a number of hours, as well as member functions for storing and retrieving the hours and days. The class should also have the following overloaded operators:

+ addition operator: When two NumDays objects are added together, the overloaded + operator should return the sum of the two objects hours members.
-subtraction operator: When one NumDays object is subtracted from another, the overloaded- operator should return the difference of the two objects hours members.
++ prefix and postfix increment operators. These operators should increment the number of hours stored in that object. When incremented, the number of days should automatically be recalculated.
-- Prefix and postfix decrement operators. These operators should decrement the number of hours stored in that object. When decremented, the number of days should automatically be recalculated.

Answer 1

See explaination

Step-by-step explanation:

#include <iostream>

using namespace std;

class NumDays{

int hours;

float day;

public:

NumDays()

{

hours=0;

day=0.0;

};

NumDays(int h)

{

hours=h;

day=float(h/8.0);

};

int getHour()

{

return hours;

}

float getDay()

{

return day;

}

NumDays operator +(NumDays obj)

{

int h=getHour()+obj.getHour();

NumDays temp(h);

return temp;

}

NumDays operator -(NumDays obj)

{

int h=getHour()-obj.getHour();

NumDays temp(h);

return temp;

}

const NumDays& operator++() //prefix

{

++hours;

day=float(hours/8.0);

return *this;

}

const NumDays& operator--() //prefix

{

--hours;

day=float(hours/8.0);

return *this;

}

const NumDays operator++(int) //postfix

{

NumDays temp(*this);

++hours;

day=float(hours/8.0);

return temp;

}

const NumDays operator--(int) //postfix

{

NumDays temp(*this);

--hours;

day=float(hours/8.0);

return temp;

}

};

int main()

{

NumDays obj(2),obj2(10),obj3,obj4;

obj3=obj2-obj;

cout<<"'obj3=obj2-obj'=> Day:"<<obj3.getDay()<<"##Hour:"<<obj3.getHour()<<"\\";

obj3=obj+obj2;

cout<<"'obj3=obj+obj2'=> Day:"<<obj3.getDay()<<"##Hour:"<<obj3.getHour()<<"\\";

obj4=obj3++;

cout<<"'obj4=obj3++' => Day:"<<obj4.getDay()<<"##Hour:"<<obj4.getHour()<<"\\";

obj4=++obj3;

cout<<"'obj4=++obj3' => Day:"<<obj4.getDay()<<"##Hour:"<<obj4.getHour()<<"\\";

obj4=obj3--;

cout<<"'obj4=obj3--' => Day:"<<obj4.getDay()<<"##Hour:"<<obj4.getHour()<<"\\";

obj4=--obj3;

cout<<"'obj4=--obj3' => Day:"<<obj4.getDay()<<"##Hour:"<<obj4.getHour()<<"\\";

};