C++ :: Array Or Vector Of Widgets?

I am trying to create an array of objects. I have to be abstract unfortunately (can't show you all my code), but this is the general gist of what I'm doing. Let's say these objects will be Widgets.

I would assume a vector of widgets would be better than an array due to it's flexibility. So if I use an array, let's say that my widjet is called MY_WIDGET and MY_WIDGET has a constructor of MY_WIDGET(int x, int y);

I have tried using an array to hold several widgets like this.

int i = 10; // obviously this number will be decided dynamically.
int x = 10;
int y = 10;
MY_WIDGET *array[i];
for(int x = 0; x < i; x++)
{
arr[x] = new MY_WIDGET(x,y);
y +=30; // moves the next widget down so they don't cover each other.
}

So now I have an array of objects or Widgets in this case. I'm only using widgets for this example because I want to display the use of a constructor.

So, while my compiler (MinGW) will let me do this, I still get an error at runtime because of the way I have dynamically sized my array 'arr[i]'.

The usual way of doing this, let's say for an int (see below), I can't apply for an object with a constructor requiring multiple parameters to construct it. Maybe I can't, I'm not sure.

int *x = 0;
x = new int[10];

This begs the question, should I be using a vector and if so, how do I dynamically push_back constructed objects into a vector without running into the same problem above. I have tried the below and get problems at compile time telling me that 'the base class is private within this context'. Not sure how to go about this but if I can understand how to dynamically create objects with constructors and add them to a vector or array I should be able to do this.

vector<MY_WIDGET> myvec;
MY_WIDGET the_widget(x,y);
myvec.push_back(the_widget);
y+=30;