Interested to Buy Any Domain ? << Click Here >> for more details...
when can we use copy constructor?
- 6 Answers
- 17677 Views
- HP, I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / richa
A copy constructor is used in 3 cases.They are listed below:
a)When an object is created from another object of the same
type.
b)When an object is passed by value as a parameter to a
function.
c)When an object is returned from a pointer.
| Is This Answer Correct ? | 38 Yes | 9 No |
Answer / amar
Copy constructors is used in following cases.
1) When object is passed by values to a fucntion
2) when function returns object by value
3) When new object is created from exixting object using
overlaoded = operator.
If user has not defined its own copy constructor, compiler
synthesised constructor would be called which will do
shallow copy. So if you have pointer in your class then only
the pointer value is copied and not the contents which
pointer points to.
| Is This Answer Correct ? | 12 Yes | 5 No |
Answer / sagarson
Copy constructors are called in following cases:
a) when a function returns an object of that class by value
b) when the object of that class is passed by value as an
argument to a function
c) when you construct an object based on another object of
the same class
d) When compiler generates a temporary object
| Is This Answer Correct ? | 7 Yes | 1 No |
Answer / namitha
A copy constructor is used in the following cases.
-When an object is created from another object of the same
type.
-When an object is passed by value as a parameter to a
function.
-When an object is returned from a pointer.
-when we want to set a default value for the data members.
| Is This Answer Correct ? | 4 Yes | 3 No |
Answer / ram
ishwarya rai is so beautiful but now she is wife of bachan so how to get another ishwarya very simple by using copy constructor we will get another ishwarya rai
| Is This Answer Correct ? | 1 Yes | 0 No |
Answer / praveen
A copy constructor is used in the following cases.
* When compiler generates a temporary object.
* When an object is return type of pointer.
* This is a temporary object.
| Is This Answer Correct ? | 2 Yes | 3 No |
What is size of string in c++?
Can notepad ++ run c++?
what are the iterator and generic algorithms.
What function initalizes variables in a class: a) Destructor b) Constitutor c) Constructor
Differentiate between the message and method?
Find out the bug in this code,because of that this code will not compile....... #include <iostream> #include <new> #include <cstring> using namespace std; class balance { double cur_bal; char name[80]; public: balance(double n, char *s) { cur_bal = n; strcpy(name, s); } ~balance() { cout << "Destructing "; cout << name << "\n"; } void set(double n, char *s) { cur_bal = n; strcpy(name, s); } void get_bal(double &n, char *s) { n = cur_bal; strcpy(s, name); } }; int main() { balance *p; char s[80]; double n; int i; try { p = new balance [3]; // allocate entire array } catch (bad_alloc xa) { cout << "Allocation Failure\n"; return 1; }
What is an incomplete type in c++?
What is the use of lambda in c++?
What is an associative container in c++?
Should a constructor be public or private?
What is meant by a delegate?
Why do we use constructor?
STL 
