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InterviewSolution
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What Is A Copy Constructor And When Is It Called? |
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Answer» <P>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 = 345A 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: |
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