Allocate memory for an object : new « Development « C++ Tutorial

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3. new

#include <iostream> 
#include <new> 
using namespace std; 
 
class Rectangle { 
  int width; 
  int height; 
public: 
  Rectangle(int w, int h) { 
    width = w; 
    height = h; 
    cout << "Constructing " << width << " by " << height << " rectangle.\n"; 
  } 
 
  ~Rectangle() {  
     cout << "Destructing " << width << " by " << height << " rectangle.\n"; 
  }  
 
  int area() { 
    return width * height; 
  } 
}; 
 
int main() 
{ 
  Rectangle *p; 
 
  try { 
    p = new Rectangle(10, 8); 
  } catch (bad_alloc xa) { 
    cout << "Allocation Failure\n"; 
    return 1; 
  } 
 
  cout << "Area is " << p->area(); 
 
  delete p; 
 
  return 0; 
}

Constructing 10 by 8 rectangle.
Area is 80Destructing 10 by 8 rectangle.