double int, array operator overloading!

[dkdkrrp]

int main() {
    
    myvector a(2);
    myvector b(2);
    
    cout << a.size();
    
    a[0] = 0.0; a[1] = 2.0;
    b[0] = 1.0; b[1] = 2.0;
    
    cout<< a[0]<<endl;
    
    
    myvector e=a+b;          //operator+ error!
    cout << e << endl;
    

    
    double g = a.norm();
    cout << g << endl;// I want double g, but when I change int>double error! 

class myvector{

    private:
        double * arr;
        int arrlen;
        double xpos, ypos;
    
    public:
        myvector();
        myvector(int size);
        int size();
        double norm();             // norm() is double but result int
        void resize(int newsize);
  
    double&  operator[](int pos)
    {
        return arr[pos];
    }
    
    double& operator+(const myvector &ref)
    {
                             //this part, how to use arr[0], arr[1], return?
    }

//////////* myvector.ccp///////////////
    double myvector:: norm()
    {
    double normvalue;
    normvalue = (double)sqrt(arr[0]*arr[0] + arr[1]*arr[1]);
   
    return normvalue;
    }
*/

[kbw]

Is there a question in there somewhere?

[Ericool]

did you implemented a assignment operator ? (=) .