Question

I have a class:

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;     
}

This is a quite simple C++ sample. I compiled in Linux g++ and run it.
Suddenly I found the delete p did not call ~Rectangle() …
I should see string like "Destructing " << width << " by " << height << " rectangle."
but I did not ….

but why?
Deleting an object should call that object’s destructor, shouldn’t it?

Answer 1

You haven’t ended the line, so the line was not output. Add << endl to your printing.