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  1. #include <iostream>
  2.  
  3. class Point {
  4. private:
  5.     int x;
  6.     int y;
  7.     static int numPoints;
  8.  
  9. public:
  10.     // Constructors
  11.     Point() : x(0), y(0) {
  12.         numPoints++;
  13.     }
  14.  
  15.     Point(int x, int y) : x(x), y(y) {
  16.         numPoints++;
  17.     }
  18.  
  19.     // Copy constructor
  20.     Point(const Point &other) : x(other.x), y(other.y) {
  21.         numPoints++;
  22.     }
  23.  
  24.     // Destructor
  25.     ~Point() {
  26.         numPoints--;
  27.     }
  28.  
  29.     // Overloaded input stream operator
  30.     friend std::istream& operator>>(std::istream &in, Point &point) {
  31.         in >> point.x >> point.y;
  32.         return in;
  33.     }
  34.  
  35.     // Overloaded output stream operator
  36.     friend std::ostream& operator<<(std::ostream &out, const Point &point) {
  37.         out << point.x << " " << point.y;
  38.         return out;
  39.     }
  40.  
  41.     // Overloaded unary minus (-) operator
  42.     Point operator-() const {
  43.         return Point(-x, -y);
  44.     }
  45.  
  46.     // Overloaded binary plus (+) operator
  47.     Point operator+(const Point &other) const {
  48.         return Point(x + other.x, y + other.y);
  49.     }
  50.  
  51.     // Overloaded postfix increment (++) operator
  52.     Point operator++(int) {
  53.         Point temp(*this);
  54.         x++;
  55.         y++;
  56.         return temp;
  57.     }
  58.  
  59.     // Overloaded equality (==) operator
  60.     bool operator==(const Point &other) const {
  61.         return (x == other.x) && (y == other.y);
  62.     }
  63.  
  64.     // Overloaded subscript operator for access to x and y
  65.     int operator[](int index) const {
  66.         return (index == 0) ? x : ((index == 1) ? y : 0);
  67.     }
  68.  
  69.     // Const member function to get the number of points
  70.     static int getNumPoints() {
  71.         return numPoints;
  72.     }
  73. };
  74.  
  75. // Initialize static member numPoints
  76. int Point::numPoints = 0;
  77.  
  78. int main() {
  79.     std::cout << std::endl;
  80.  
  81.     Point p1;
  82.     Point p2(3, 5);
  83.  
  84.     std::cout << "Enter x and y values: ";
  85.     std::cin >> p1;
  86.     std::cout << p1 << " " << -p2 << std::endl;
  87.     std::cout << (p1 + p2) << std::endl;
  88.     std::cout << (p2++) << std::endl;
  89.     std::cout << p2 << std::endl;
  90.     std::cout << (p1 == p2) << std::endl;
  91.     std::cout << p1[1] << " " << p1[0] << std::endl;  // Corrected the order of indices
  92.     std::cout << Point::getNumPoints() << std::endl;
  93.  
  94.     std::cout << std::endl;
  95.     return 0;
  96. }
  97.  
Success #stdin #stdout 0.01s 5304KB
comments (?)
stdin
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20
30
stdout
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Enter x and y values: 20 30 -3 -5
23 35
3 5
4 6
0
30 20
2
https://ideone.com/wwKPjT
language:
C++14 (gcc 8.3)
created:
237 days ago
visibility:
public

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