What is a COPY CONSTRUCTOR and when is it called?
What is a COPY CONSTRUCTOR and when is it called?
✍: fyicenter.com
A copy constructor is a method that accepts an object of the same class and copies it’s data members to the object on the left part of assignement:
class Point2D{
int x; int y;
public int color;
protected bool pinned;
public Point2D() : x(0) , y(0) {} //default (no argument) constructor
public Point2D( const Point2D & ) ;
};
Point2D::Point2D( const Point2D & p )
{
this->x = p.x;
this->y = p.y;
this->color = p.color;
this->pinned = p.pinned;
}
main(){
Point2D MyPoint;
MyPoint.color = 345;
Point2D AnotherPoint = Point2D( MyPoint ); // now AnotherPoint has color = 345
2012-02-14, 2921👍, 0💬
Related Topics:
What is an object? C++
What is an object? C++ Object is a software bundle of variables and related methods. Objects have state and behavior. 2012-02-08, 3054👍, 0💬
What are 2 ways of exporting a function from a DLL?
What are 2 ways of exporting a function from a DLL? 1.Taking a reference to the function from the DLL instance. 2. Using the DLL ’s Type Library 2012-02-17, 3033👍, 0💬