Answer:
Check the explanation
Explanation:
#include <iostream>
#include <string>
using namespace std;
//class declaration
class NumDays{
private:
double hours;
double days;
public:
//constructor
NumDays(double h = 0){
hours = h;
days = h/(8.00);
}
//getter functions
double getHours(){
return hours;
}
double getDays(){
return days;
}
//setter functions
void setHours(double h){
hours = h;
days = h/(8.00);
}
void setDays(double d){
days = d;
hours = d*(8.00);
}
//overload + operator
double operator+ (const NumDays &right){
return hours+right.hours;
}
//overload - operator
double operator- (const NumDays &right){
//check if subtraction will give negative value
if(hours < right.hours){
cout << "ERROR! Cannot subtract! Now terminating!\n";
exit(0);
}
return hours-right.hours;
}
//overload prefix ++ operator
NumDays operator++(){
//pre-increment hours member
++hours;
//update days member
days = hours/(8.00);
//return modified calling object
return *this;
}
//overload postfix ++ operator
NumDays operator++(int){
//post-increment hours member
hours++;
//update days member
days = hours/(8.00);
//return modified calling object
return *this;
}
//overload prefix -- operator
NumDays operator--(){
//pre-decrement hours member
--hours;
//update days member
days = hours/(8.00);
//return modified calling object
return *this;
}
//overload postfix -- operator
NumDays operator--(int){
//post-decrement hours member
hours--;
//update days member
days = hours/(8.00);
//return modified calling object
return *this;
}
};
int main()
{
//create first object
cout << "Creating object with 12 hours...\n";
NumDays obj1(12);
cout << obj1.getHours() << " hours = " <<obj1.getDays() << " days.\n";
//create second object
cout << "\nCreating object with 18 hours...\n";
NumDays obj2(18);
cout << obj2.getHours() << " hours = " <<obj2.getDays() << " days.\n";
//test overloaded + operator
cout << endl << "Adding hours... " << obj1 + obj2 << " hours.\n";
//test overloaded - operator
cout << endl << "Subtracting hours... " << obj2 - obj1 << " hours.\n\n";
//test overloaded ++ operators
cout << "Pre- and post-incrementing first object...\n";
++obj1;
cout << obj1.getHours() << " hours = " <<obj1.getDays() << " days.\n";
obj1++;
cout << obj1.getHours() << " hours = " <<obj1.getDays() << " days.\n";
//test overloaded -- operators
cout << "\nPre- and post-decrementing second object...\n";
--obj2;
cout << obj2.getHours() << " hours = " <<obj2.getDays() << " days.\n";
obj2--;
cout << obj2.getHours() << " hours = " <<obj2.getDays() << " days.\n";
return 0;
}
