Create a simple Point class Members: int x, y These should be private Instance M

Question

• Create      a simple Point class
• Members:
  •   
  • int       x, y
  •   
  • These       should be private
• Instance      Methods:
  •   
  • Constructor       1
  •   
    •    
    • Takes        no parameters
    •    
    • Sets        x and y to 0.
    •   
  •   
  • Constructor       2
  •   
    •    
    • Takes        two int parameters, x and y
    •    
    • Sets        x and y to the given values
    •   
  •   
  • Add
  •   
    •    
    • Takes        another Point and adds its x and y values to this Point
    •    
    • Does        not return anything.
    •   
  •   
  • Subtract
  •   
    •    
    • Takes        another Point and subtracts its x and y values from this Point
    •    
    • Does        not return anything.
    •   
  •   
  • Print
  •   
    •    
    • Takes        no parameters.
    •    
    • Prints        the point in the following format: (x, y)
    •    
    • Does        not return anything.
    •   
• Driver
  •   
  • Make       several Points and add / subtract them.  Print out the values of the       Points before and after the additions / subtractions.

Explanation / Answer

#include <iostream>

using namespace std;

class Point

{

public:

Point(void)

{

x = 0;

y = 0;

}

Point(int X, int Y)

{

x = X;

y = Y;

}

~Point(void)

{

}

void add(Point p)

{

x += p.x;

y += p.y;

}

void Subtract(Point p)

{

x -= p.x;

y -= p.y;

}

void Print(void)

{

cout << "(" << x << "," << y << ")" << endl;

}

private:

int x;

int y;

};

int main()

{

Point p(1,2), q(3,4);

/**** Add point p to q ****/

cout << "P = ";

p.Print();

cout << "Q = ";

q.Print();

p.add(q);

cout << "P + Q = ";

p.Print();

/**** Subtract point p to q ****/

cout << "P = ";

p.Print();

cout << "Q = ";

q.Print();

p.Subtract(q);

cout << "P - Q = ";

p.Print();

return 0;

}

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