Question
Answer the question (i) and (ii) after going through the following class :
class Travel
{
int PlaceCode; char Place[20]; float Charges; public:
Travel( ) //Function 1
{
PlaceCode=1;strcpy(Place,”DELHI”);Charges=1000;
}
void TravelPlan(float C ) // Function 2
{
cout<<PlaceCode<<“:”<<Place<<”:”<<Charges<<endl;
}
~Travel( ) // Function 3
{
cout<<”Travel Plan Cancelled”<<endl;
}
Travel(int PC,char p[],float C) // Function 4
{
PlaceCode=PC;strcpy(Place,P);Charges=c;
}(i) In Object Oriented Programming, what are Function 1 and Function 4 combined together referred as?
(ii) In Object Oriented Programming, which concept is illustrated by Function 3? When is this function called/invoked?
Solution
(i) Polymorphism or Constructor Overloading
(ii) Function 3: Destructor
A destructor called/invoked when an object of that class is destroyed. When a variable goes out of scope, or a dynamically allocated variable is explicitly deleted using the delete keyword, the class destructor is called to help clean up the class before it is removed from memory.
