C++ : Array of Objects of a Class with Overloaded Constructors

Suppose i have a class "myclass" -:

class myclass
{
public:
    int n;
    myclass(int n=0)
    {
        this->n=n;
    }
    myclass(myclass &a)
    {
        this->n=a.n;
    }
    ~myclass()
    {
        cout<<n<<"\n";
    }
};  

Now i want to create an array of objects of "myclass" as follows -:

int main()
{
    myclass arr[]= {5};  // Only 1 element for simplicity...
}

But when i do this , i get the following error -:

In function ‘int main()’:
|47|error: no matching function for call to ‘myclass::myclass(myclass)’
|47|note: candidates are:
|36|note: myclass::myclass(myclass&)
|36|note: no known conversion for argument 1 from ‘myclass’ to ‘myclass&’
|32|note: myclass::myclass(int)
|32|note: no known conversion for argument 1 from ‘myclass’ to ‘int’

But when i remove the copy constructor myclass(myclass &a) from the class , i don't get any errors and everything works fine...

So now my questions are -:

1). Why is this happening?? Isn't myclass(int n=0) a better match than the copy constructor here??

2). How to successfully compile it , considering I want both , the copy constructor as well as the integer constructor in my class??

NOTE: I am using GCC version 4.7.3 on Ubuntu 13.04 ( If it is of any relevance. )