Plab 2002/2003 - 
Example for questions for the final exam.

Code segment A:
----------------

Class Point {
private:
	double m_x;
	double m_y;

public:
	Point(double x, double y): m_x(x), m_y(y) { }

	Point& operator*(Point const& p1, Point const& p2) {
		p1.m_x *= p2.m_x;
		p1.m_y *= p2.m_y;
		return p1;
	}

	void setX( double x) const {
		m_x = ix;
	}
	double getX() const {
		return m_x;
	}
	void print() {
		cout << m_x << "," << m_y << endl;
	}
};

(End of code segment A)


The following questions (a-c) relate to code segment A:

a.	Complete ALL the correct statements, if any: 
	1. The function setX will cause compilation errors because:
 
 
 
 
	2. The function getX will cause compilation errors because: 






 

b.	Consider the following code: 

	Point p1(3.0,2,0); 
	Point p2(4.0,5.0); 
	Point p3(2.0,3.0); 
	p1=(p3*p2)*p1; 
	p1.print();
 
  Complete the correct statement: 
  1. The operator* method compiles well, and the output of the 
     lines above is : _______________ 
  2. The operator* method doesn't compile, because ___________________





c. re-write the class Point as a template class (without the getX and 
   setX methods). Instead of doubles, it should be able to hold any 
   class (x and y are of the same class).