Error: pure virtual method called terminate called without an active exception

class A
{
public:
  static const int value1 = 1024;

  enum AuthType
  {
    AuthType0 = 0;
    AuthType1 = 1;
    AuthType2 = 2;
  };

  virtual ~A() {}
  virtual bool init() = 0;
  virtual AuthType getAuthtype() = 0;
  virtual int getSize() = 0;
}

class B : public A
{
public:
    B();
    bool init();
    Authtype getAuthType();
    int getSize();
private:
    static std::atomic_uint s_ref;
    uint8_t* m_cert;
}

B::B()
{
  m_cert = nullptr;
}

bool B::init()
{
  if(s_ref == 0)
  {...}
  s_ref++;
  ...
  if(!m_cert)
  {...}
  return true;
}

A::AuthType
B::getAuthType()
{return AuthType1;}

int B::getSize()
{return ... }

I made a sample code for testing the action of these Classes. (Class A, and Class B)

The sample code is below.

int main(int argc, char* argv[])
{
  B *pB = new B();
  B ppB;
  A::Authtype aa = A::AuthType0;
  A::Authtype ab = A::Authtype0;

  printf("%d", A::Authtype0);
  printf("%d", pB->value1);

  pB->init();
  ppB.init();

  aa = pB->getAuthtype();
  printf("%d", aa);
  ...
  return 0;
}

After init, I called getAuthtype(), and the error occurred. The error is below.

pure virtual method called terminate called without an active exception Aborted

I googled the error, and I found the reason. When a function which includes virtual keyword was called in constructor, this error may occur even if compile was good. But I don't think my problem is same as that. Could you guys find the cause of my problem?