# include <iostream.h>
 # include <graphics.h>
 # include    <conio.h>
 # include     <math.h>


 void show_screen( );

 void Circular_arc(constint,constint,constint,constint,constint);


 int main( )
    {
       int driver=VGA;
       int mode=VGAHI;

       int h=0;
       int k=0;
       int r=0;
       int s=0;
       int e=0;

       do
      {
         show_screen( );

         gotoxy(8,10);
         cout<<"Central Point of the Arc : (h,k) :";

         gotoxy(8,11);
         cout<<"ÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ";

         gotoxy(12,13);
         cout<<"Enter the value of h = ";
         cin>>h;

         gotoxy(12,14);
         cout<<"Enter the value of k = ";
         cin>>k;

         gotoxy(8,18);
         cout<<"Radius of the Arc : r :";

         gotoxy(8,19);
         cout<<"ÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ";

         gotoxy(12,21);
         cout<<"Enter the value of r = ";
         cin>>r;

         gotoxy(8,25);
         cout<<"Starting & Ending Angle of Arc : (s,e) :";

         gotoxy(8,26);
         cout<<"ÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ";

         gotoxy(12,28);
         cout<<"Enter the value of s = ";
         cin>>s;

         gotoxy(12,30);
         cout<<"Enter the value of e = ";
         cin>>e;

             initgraph(&driver,&mode,"..\\Bgi");

         setcolor(15);
           Circular_arc(h,k,r,s,e);

         setcolor(15);
           outtextxy(110,460,"Press <Enter> to continue or any other key to exit.");

         int key=int(getch( ));

         if(key!=13)
        break;
      }
       while(1);

       return 0;
    }


 /*************************************************************************///--------------------------  Circular_arc( )  --------------------------///*************************************************************************/void Circular_arc(constint h,constint k,constint r,
                  constint start_angle,constint end_angle)
    {
       int color=getcolor( );

       float angle=(((start_angle<=end_angle)?start_angle:end_angle)*(M_PI/180));
       float range=(((end_angle>start_angle)?end_angle:start_angle)*(M_PI/180));

       float x=(r*cos(angle));
       float y=(r*sin(angle));

       do
      {
         putpixel((int)(h+x+0.5),(int)(k-y+0.5),color);

         angle+=0.001;

         x=(r*cos(angle));
         y=(r*sin(angle));
      }
       while(angle<=range);
    }

 /*************************************************************************///--------------------------  show_screen( )  ---------------------------///*************************************************************************/void show_screen( )
    {
       restorecrtmode( );
       textmode(C4350);

       cprintf("\n********************************************************************************");
       cprintf("*******************************-                -*******************************");
       cprintf("*------------------------------- ");

       textbackground(1);
       cprintf(" Circular Arc ");
       textbackground(8);

       cprintf(" -------------------------------*");
       cprintf("*-*****************************-                -*****************************-*");
       cprintf("*-****************************************************************************-*");

       for(int count=0;count<42;count++)
      cprintf("*-*                                                                          *-*");

       gotoxy(1,46);
       cprintf("*-****************************************************************************-*");
       cprintf("*------------------------------------------------------------------------------*");
       cprintf("********************************************************************************");

       gotoxy(1,2);
    }