2. C++ struct

• In C++, the struct may also contain functions as members. For example,

  
  struct Rectangle {
      int width;  // member variable
      int height; // member variable
  
      // C++
      void set_dimensions( int width_ , int height_ )
      {
          width = width_;
          height = height_;
      }
  
      int area() const
      {
          return ( width * height );
      }
  };
  
  

• Similar to variables, the struct must be defiend before it can be used.

• Notice that member function area( ) is declared const. The const modifier tells the compiler that the function does not modify the object's state, only reading its data.