//---------------------------------------------------
//operator>
//overwrite the operator>
//@param book the book that compare to
//@return true if grater than, false if smaller
bool Periodical::operator>(const Publication& book)const{
if(year > book.getYear()) return true; //year is greater
else if(year == book.getYear()){ //year is equal -> check month
if(month > book.getMonth()) return true; //month is greater
else if(month == book.getMonth()){ //month is equal -> check title
return thisBookTitle > book.getTitle();
}else
return false; //month is smaller
}else //year is smaller
return false;
}
//---------------------------------------------------
//operator==
//overwrite the operator==
//@param book the book that compare to
//@return true if equals, false if not
bool Periodical::operator==(const Publication& book)const{
return (year == book.getYear() && month == book.getMonth()
&& thisBookTitle == book.getTitle() && thisBookType == book.getType());
}