Thread: constructor problem

As a part of an exercise I need to built Drawing class that contains an array
of pointers to objects from other classes (different types of shapes)
I have a few problems with the constructor.
at first I tried:

Code:

typedef shape* pshape;
...

Drawing(int n=10) :size_(n)
  {
	drawing_ = new pshape[n];
	for (int i=0; i<n; i++)
	     drawing_[i] = new shape();
  }

but after the line: drawing_ = new pshape[n]; the program returns to main()
without entering the for loop;
so I tried this instead:

Code:

Drawing(int n=10) :size_(n)
  {
	pshape* temp;
       temp = new pshape[n];
       if (temp==NULL) exit(-1);
	for (int i=0; i<n; i++)
        {
	      temp = new shape();
              if (temp[i]==NULL) exit(-1);
         }
       drawing_=temp;
  }

and this time it returns to main right after pshape* temp;
what wrong with the code?