C%20%20%20Interview%20Questions%20and%20Answers
Question: What is a COPY CONSTRUCTOR and when is it called?Answer: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 |
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