Allocate an array of objects using new operator : object array « Class « C++ Tutorial

1. C++ Tutorial
2. Class
3. object array

#include <iostream> 
#include <new> 
using namespace std; 
 
class Rectangle { 
  int width; 
  int height; 
public: 
  Rectangle() {  
    width = height = 0; 
    cout << "Constructing " << width << " by " << height << " rectangle.\n"; 
  } 
 
  Rectangle(int w, int h) { 
    width = w; 
    height = h; 
    cout << "Constructing " << width << " by " << height << " rectangle.\n"; 
  } 
 
  ~Rectangle() {  
     cout << "Destructing " << width << " by " << height << " rectangle.\n"; 
  }  
 
  void set(int w, int h) { 
    width = w; 
    height = h; 
  } 
 
  int area() { 
    return width * height; 
  } 
}; 
 
int main() 
{ 
  Rectangle *p; 
 
  try { 
    p = new Rectangle [3]; 
  } catch (bad_alloc xa) { 
    cout << "Allocation Failure\n"; 
    return 1; 
  } 
 
  cout << "\n"; 
 
  p[0].set(3, 4); 
  p[1].set(10, 8); 
  p[2].set(5, 6); 
 
  for(int i=0; i < 3; i++) 
    cout << "Area is " << p[i].area() << endl; 
 
  delete [] p; 
 
  return 0; 
}

Constructing 0 by 0 rectangle.
Constructing 0 by 0 rectangle.
Constructing 0 by 0 rectangle.

Area is 12
Area is 80
Area is 30
Destructing 5 by 6 rectangle.
Destructing 10 by 8 rectangle.
Destructing 3 by 4 rectangle.