Untitled

#include <iostream>

using namespace std;

// Class declaration -- declared outside the main() function
class Point {
	private:
		int x, y;
	public:
		Point() {} 						// default constructor 
		Point(int new_x); 				// alternate constructor 
		Point(int new_x, int new_y); 	// ordinary constructor 
	
	// other member functions
		void set(int new_x);
		void set(int new_x, int new_y);		// These are the function prototypes, but 
		int get_x();						//  we still need function definitions
		int get_y();
	};	

int main() {
    Point pt1, pt2;		// Create two new objects, both of type Point, using the default constructor
    Point pt3(5, 10);	// Create another object, using the regular constructor
    Point pt4(1000);	// Try out the new constructor!
    
    cout << "The value of pt1 is " << pt1.get_x() << ", " << pt1.get_y() << endl;
    cout << "The value of pt3 is " << pt3.get_x() << ", " << pt3.get_y() << endl;
    cout << "The value of pt4 is " << pt4.get_x() << ", " << pt4.get_y() << endl;
    
    cin.get();
    return 0;
}

// Set & get function definitions
// The set function simply accepts a value from the calling function, and
//  sets that value for x & y. If the args are negative, it will reverse the sign.
//
Point::Point(int new_x) {
	set(new_x);
}

Point::Point(int new_x, int new_y) {
	set(new_x, new_y);
}


void Point::set(int new_x, int new_y) {
	if (new_x < 0)
		new_x *= -1;
	if (new_y < 0)
		new_y *= -1;
	x = new_x;
	y = new_y;
}


// Must have a function definition for the alternate constructor as well as the 
//  regular constructor.
//
void Point::set(int new_x) {
	if (new_x < 0)
		new_x *= -1;
	
	x = new_x;
	y = 0;
}

// The get functions will simply return the x & y values that have been set above
//
int Point::get_x() {
	return x;
}

int Point::get_y() {
	return y;
}