int main (void) {
	int *x = new int;
	*x = 7;
	int *arr = new int[*x];
	arr[0] = 3;
	arr[6] = -2;
	delete arr; // legal but may cause memory leak; delete[] arr would be safer.
	delete[] x; // legal but doesn't make sense because x isn't really an array
	delete x; // compiles but doesn't make sense because x has already been deleted
	// If you're lucky, run-time library will catch the duplicate deletion.
	// If not, can get crashes, randomly-changing data, etc.
	}