Draw a circle. Move a mark around on the circle (let it move a bit each time you

Question

Draw a circle. Move a mark around on the circle (let it move a bit each time you hit the “Next” button).

PLEASE FOLLOW THIS CODE. The code shoud be like this but i could not frigure it out what wrong on this.

int main()

   try
   {
   if(H112 != 201401L)error("Error: incorrect std_lib_facilities_4.h version ",
           H112);

   Point top_left {100,100};
      
   Simple_window canvas {top_left, 1000, 600, "Canvas"};
   Circle : Shape
   {   
   Circle(Point p, int rr);
   void draw_lines() const;
Point center() const ;
   int radius() const { return r; }
void set_radius(int rr)
   {
   set_point(0,Point{center().x–rr,center().y–rr}); // maintain   
   r = rr;
   }
   private:   
   int r;
   };
      
   Circle c1 {Point{100,200},50};
   Circle c2 {Point{150,200},100};
   Circle c3 {Point{200,200},150};
  
   Circle::Circle(Point p, int rr) // center and radius
   :r{rr}
   {
   add(Point{p.x–r,p.y–r}); // store top left corner
   }
   Point Circle::center() const
   {
   return {point(0).x+r, point(0).y+r};
   }
   void Circle::draw_lines() const
   {
if (color().visibility())
fl_arc(point(0).x,point(0).y,r+r,r+r,0,360);
   }

          
          
  
      
      
      
      
      
      
      
   return 0;
}
catch(exception& e) {
   cerr << "exception: " << e.what() << ' ';
   return 1;
}
catch (...) {
   cerr << "Some exception ";
   return 2;
}

Explanation / Answer

#include<stdio.h>
#include<graphics.h>
#include<conio.h>
int main(){
int gd = DETECT,gm;
int x ,y ,radius=80;
initgraph(&gd, &gm, "C:\TC\BGI");
x = getmaxx()/2;
y = getmaxy()/2;
outtextxy(x-100, 50, "CIRCLE Using Graphics in C");
circle(x, y, radius);
getch();
closegraph();
return 0;
}

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