The sum of two points with the rectangular coordinates [a,b] and [c,d] is given by [a+c,b+d]. We therefore write: [a,b] + [c,d] = [a+c,b+d] For example [2,5]+ [6,2] = [8,7]. Design a C++ class called Points. Use the two integer numbers as your class private data. Create three constructors: a default constructor, a constructor that takes two integers, and a constructor that takes two sets of points. Provide at least two functions within the class: addPoints(Points x) that will add the two points and print the result print() that will print the sets of points Use the following C++ main() program below to minimally test your class design to verify that your design works accordingly. #include using namespace std; int main() { Points p1, p2(3,2), p3(4,2), p4(2,1); p1.print(); p2.print(); // add p2 to p1 p1.addPoints(p2); p1.print(); // add p3 and p4 Points p5(p3, p4); p5.print(); system("pause"); return 0; }

Answer

#include

using namespace std;

// class Points that contains the rectangular coordinates of a point

class Points{

// data members representing x- and y- coordinates of a point

private:

int x,y;

public:

// default constructor initializing to (0,0)

Points()

{

x=0;

y=0;

}

// parameterized constructor that takes two integers as input

Points(int x1,int y1)

{

x=x1;

y=y1;

}

// parameterized constructor that takes two sets of Points as input

// initializes the Points object with the sum of the rectangular coordinates of the two Points passed as inputs

Points(Points p1,Points p2)

{

x = p1.x + p2.x;

y = p1.y + p2.y;

}

// function to add Points x to the calling object

void addPoints(Points x)

{

this->x = this->x + x.x;

y = y +x.y;

}

// function to print the coordinates

void print()

{

cout<<"("<

}

};

int main() {

Points p1, p2(3,2), p3(4,2), p4(2,1);

p1.print();

p2.print();

// add p2 to p1

p1.addPoints(p2);

p1.print();

// add p3 and p4

Points p5(p3, p4);

p5.print();

system("pause");

return 0;

}

Please help me to understand

// parameterized constructor that takes two sets of Points as input

// initializes the Points object with the sum of the rectangular coordinates of the two Points passed as inputs

Points(Points p1,Points p2)

{

x = p1.x + p2.x;

y = p1.y + p2.y;

}

// function to add Points x to the calling object

void addPoints(Points x)

{

this->x = this->x + x.x;

y = y +x.y;

}

What does Points(Points p1,Points p2) Points p1 do and what the use of .(dot) operator?