Question

Answer the question after going through the following class.

class Book {
int BookCode ; char Bookname[20];float fees;
public:
Book( )   //Function 1
{ fees=1000;
BookCode=1;
strcpy(Bookname,"C++"); }
void display(float C) //Function 2
{ cout<<BookCode<<":"<<Bookname<<":"<<fees<<endl; }
~Book( )         //Function 3
{ cout<<"End of Book Object"<<endl; }
Book (intSC,char S[ ],float F) ; //Function 4
};

What is the use of Function 3?

Answer 1

Function 3 is the destructor of the class.

• Destructor (function3) will free resources if any that the object may have acquired during its lifetime
• The destructor function removes the memory of an object which was allocated by the constructor at the time of creating an object. Thus frees the unused memory.