Set array of object to null in C++

Question

Suppose I have an array of objects of type Foo in C++:

Foo array[10];

In Java, I can set an object in this array to null simply by:

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Answer 1

Other way that you have is using one dynamic array of pointers of Foo like this:

Foo** array = new Foo*[10];// Pointer of array of pointers.

Then you can initialize all this pointers to objects Foo

for(int i=0;i<10;i++)
    array[i] = new Foo();// Give memory to pointers of object Foo in array

assign null to one item of array:

array[0] = 0;

I think that in C++, NULL is 0. This means it can even be assigned to an int or anywhere a 0 is acceptable. Conventionally, it's only used with pointers.

For delete this memory:

for(int i=0;i<10;i++)
    delete array[i];

and finally

delete[] array;

Code Example:

#include 
#include 
class Foo
{
  private:
    int a;
  public:
    Foo()
    {
      a = 0;
    }
   void Set_V(int p){a = p;}
   int Get_V(){return a;}
};

int main()
{
  Foo **array = new Foo*[10];
  for(int i=0;i<10;i++)
   {
     array[i] = new Foo();
   }

  //array[0] = 0;
  for(int i=0;i<10;i++)
    array[i]->Set_V(i);
  for(int i=0;i<10;i++)
    cout<Get_V()<