Inheritance and STL vector

Question

let's say i got a class "Simple" with this private var : std::vector m_listePoint; which constructor is

Simple(EnumCouleur::tEnumCouleur c,vector<Point> listeP);

(couleur is inherited from her mother class)

i got another class which is "Circle" ( a child class of "Simple"), with 2 vars : 1 Point, 1 radius Here is the constructor i ve tried :

Cercle::Cercle( const Point centre, const double rayon, EnumCouleur::tEnumCouleur v)
{
        m_rayon = rayon;
        vector<Point> liste;
        liste.push_back(centre);
        __super::Simple(v,liste);

}

I got an error saying Simple doesnt have a default constructor.

I know that basically i should do this way :

 Cercle::Cercle( const Point centre, const double rayon, EnumCouleur::tEnumCouleur v) : m_rayon(rayon), Simple(...)

the problem is : how to build the vector then?

This might be a stupid question i don't know, i come from java, this is why i used super and might be bad way...

Answer 1

Use the vector constructor that makes a vector of n copies of an element:

Cercle::Cercle( const Point centre, const double rayon, EnumCouleur::tEnumCouleur v) 
       : m_rayon(rayon), Simple(v, std::vector<Point>(1, centre)) { /* ... */ }

Or, in C++11, use the initializer list constructor:

Cercle::Cercle( const Point centre, const double rayon, EnumCouleur::tEnumCouleur v) 
       : m_rayon(rayon), Simple(v, {centre}) { /* ... */ }