c 2b 2b base constructor

1class Derived: public Base
2{
3public:
4    double m_cost;
5 
6    Derived(double cost=0.0, int id=0)
7        : Base{ id }, // Call Base(int) constructor with value id!
8            m_cost{ cost }
9    {
10    }
11 
12    double getCost() const { return m_cost; }
13};