c++ - Redefinition of class error -

I calculate the fourth to make'm designing a program that takes three points and parallel chart I By what I'm doing:

  struct Smantrlogram public polygon {Smantrbhuj (Point TL, Point Trash, Point blocks) Point bar; Int number = tr.y-tl.y; Int denom = tr.x-tl.x; Br.x = denom + bl.x; Br.y = number + bl.y; }}; Paralegal :: Paralegal (Point TL, Point Tr, Point Blow) {Joint (TL); (Tr); (BL); (Br); };   
 While compiling I get the following error:  
  hw6pr2.cpp: 15: 1: error: Parallagrag re-definition :: Paralelogram (Point, Point, Point) Ã ¢ hw6pr2.cpp: 6: 2: error: a Smantrlelagra :: Paralelogram (Point, Point, Point) is defined before   
 My question is: If The way I am right from the polygon class? If so, why am I getting this error?   
 
 
 You  Parallelogram :: There are two definitions of Parallelogram (Point, Point, Point) < / Code>; One out of the class and one out You can not have several definitions of the function.  
 Let's assume that  addition  adds a dot to your  polygon , it seems that you really want just to be a part of the definition first you can define it in your class:  
  struct Smantrlogram public polygon {Smantrbhuj (Point TL, Point Trash, Point blocks) {Point bar; Int number = tr.y-tl.y; Int denom = tr.x-tl.x; Br.x = denom + bl.x; Br.y = number + bl.y; (TL); (Tr); (BL); (Br); }}; Alternatively, you can declare it inside your class and then define it:  
  struct parallelogram: public polygon {parallelogram (point tl, point tr, point bl) ; }; Parallelogram :: Parallel Clause (Point TL, Point Tr, Point Blow) {Point Br. Int number = tr.y-tl.y; Int denom = tr.x-tl.x; Br.x = denom + bl.x; Br.y = number + bl.y; (TL); (Tr); (BL); (Br); }