title: No matching function for call to Class Constructor
body: <p>I am practicing my OOP and I have the following classes: Point and Circle.  Specifically, Circle has a center Point, and a radius.  Here is the relevant code:</p>
  
  <pre><code>// Point.h
  class Point
  {
      public:
          Point(double x, double y);
          double x() const;
          double y() const;
          std::string as_string() const;
  
      private:
          double x_coord;
          double y_coord;
  };
  
  // Circle.h
  class Circle
  {
      public:
          Circle(const Point&amp; center, double radius);
          Point center() const;
          double radius() const;
          std::string as_string() const;
          std::string equation() const;
  
      private:
          Point center_pt;
          double radius_size;
  };
  
  // Circle.cpp
  Circle::Circle(const Point&amp; center, double radius)
  {
      center_pt = center;
      radius_size = radius;
  }
  </code></pre>
  
  <p>However, when I try to compile this code, I get the following error:</p>
  
  <pre><code>Circle.cpp: In constructor ‘Circle::Circle(const Point&amp;, double)’:
  Circle.cpp:3: error: no matching function for call to ‘Point::Point()’
  Point.h:10: note: candidates are: Point::Point(double, double)
  Point.h:8: note:                 Point::Point(const Point&amp;)
  </code></pre>
  
  <p>I am not sure how to interpret this error.  Is it telling me I need to provide the x_coord and y_coord for the Point parameter in my Circle constructor?</p>