DELHI 2006:
2.b) Answer the following questions (i) and (ii) after going through the following class.
class Interview { int Month;
public:
interview(int y) {Month=y;}
//constructor 1
interview(Interview&t);
//constructor 2
};2
(i) create an object, such that it invokes Constructor .
1
Ans: Interview A(10); //invoking constructor 1 by passing a number.
(ii) write complete definition for Constructer .
2
Ans: Interview(Interview &t) //This is a copy constructor.
{ Month=t.Month;
}
OUTSIDE DELHI 2006:
1.f) What is a default constructor? How does it differ from destructor?
2
a) Default constructor: A constructor that accepts no parameter is called the default constructor.
With a default constructor, objects are created just the same way as variables of other data types are created.
class X
{ int i ;
public:
int j, k ;
------ //Members
Functions
------
};
Eg: X ob1;
Student s1;
If a class has no explicit constructor defined, the compiler will supply a default constructor. This implicitly declared default constructor is an inline public members of its class. Declaring a constructor with arguments hides the default constructor.There can be a default constructor as well as another constructor with arguments for a class, having multiple constructors is called as constructor overloading.
2.b) Answer the following questions (i) and (ii)after going through the following class.
class Exam
{ int Year;
public:
Exam(int y) //Constructor 1
{ Year=y;
}
Exam(Exam &t);
//Constructor 2
};2
(i) Create an object, such that it invokes Constructor .
1
Ans: Exam E((2008);
(ii) Write complete definition for constructor .
2
Ans: Exam(Exam &t)
//Copy Constructor.
{ Year=t.Year;
}
CBSE Computer Science Solved Revision Tour By Mr. Ravi Kiran ( [email protected] )
