Point.cpp

Code

#include <iostream>
using std::cout;
using std::endl;

class Point {
private:
    int x, y;
    void init(const int x, const int y);
public:
    Point();
    Point(const int x, const int y);
    ~Point();
    void setX(const int x);
    void setY(const int y);
    int getX() const;
    int getY() const;
    void print() const;
};

Point::Point() {
    init(0, 1);
    cout << "In default constructor" << endl;
}

Point::Point(int x, int y) {
    init(x, y);
    cout << "In (int, int) constructor" << endl;
}

Point::~Point() {
    cout << "Destructing: ";
    print();
    cout << endl;
}

void Point::init(const int x, const int y) {
    setX(x);
    setY(y);
}

void Point::setX(const int x) {
    // bounds checking only allows positive values
    this->x = x>=0 ? x : 0;
}

void Point::setY(const int y) {
    // bounds checking only allows positive values
    this->y = y>=0 ? y : 0;
}

int Point::getX() const { return x; }

int Point::getY() const { return y; }

void Point::print() const {
    cout << "(" << x << "," << y << ")";
}

int main(void) {
    Point* ptr;

    Point p;
    cout << "Default point: ";
    p.print();
    cout << endl;

    p.setX(8);
    p.setY(-7);
    cout << "After setting to (8,-7): ";
    p.print();
    cout << endl;

    ptr = new Point(47, 2);
    cout << "New point: ";
    ptr->print();
    cout << "\nx = " << ptr->getX() << ",  "
        << "y = " << ptr->getY() << endl;

    delete ptr;

    return 0;
}

/*
    Sample output:

    In default constructor
    Default point: (0,1)
    After setting to (8,-7): (8,0)
    In (int, int) constructor
    New point: (47,2)
    x = 47,  y = 2
    Destructing: (47,2)
    Destructing: (8,0)
*/