Ambiguity Cases

Chances of ambiguity in the case of Constructors with default arguments:

Case:1
class complex
{
      float real;
      float imag;
   public:
      complex(void);
      complex(float a=1.5);
};

Case:2
class complex
{
      float real;
      float imag;
   public:
      complex(float a=1.5);
      complex(float, float b=2.5);
};

Welcome my dear students,

Here you can post your doubts, thoughts and ideas.