Question

I have a C++ class with two member variables

std::map<int, Node*> a;

and

std::set<Node*> b;

A style checker used at my University requires all member variables to be initialized in the constructor of the class. How can these member variables a and b be initialized to empty in the constructor of the class they are in?

Answer 1

Like this:

class A
{
  public :

  A() : s(),
        m()
  {
  }


  std::set< int > s;
  std::map< int, double > m;
};