#include <stdio.h>
#include <graphics.h>
#include <conio.h>
#include <math.h>
main()
{
 int gd=DETECT;
 int gm=DETECT;
 int xc,yc,r,loop,c;
 initgraph(&gm,&gd,"c:\\turboc\\bgi");
 cleardevice();
 printf("\n\n\n\n\n");
 about();
 startgr();
 printf("\n\n\n\n");
 horbar(640);
 printf("\n");
 cirgen();
 printf("\n");
 horbar(640);
 delay(10000);
 blackout();
 clrscr();
 cleardevice();
 while(1)
 {
  printf("\n\n\n\n\t\t   ");
  horbar(40);
  printf("\n");
  cirgen();
  printf("\n\t\t   ");
  horbar(40);
  printf("\n");
  printf("\n\n\t\t    Enter the center x - coordinates : ");
  scanf("%d",&xc);
  printf("\n\t\t    Enter the center y - coordinates : ");
  scanf("%d",&yc);
  printf("\n\t\t    Enter the radius of the circle : ");
  scanf("%d",&r);
  eval();
  cleardevice();
  drawcircle(xc,yc,r);
  getche();
  blackout();
  clrscr();
  cleardevice();
  printf("\n\n\n\n\t\t   ");
  horbar(40);
  printf("\n");
  cirgen();
  printf("\n\t\t   ");
  horbar(40);
  printf("\n\n");
  c=cont();
  if(c==1)
   break;
  clrscr();
  cleardevice();
 }
 clrscr();
 cleardevice();
 exitmod();
 clrscr();
 cleardevice();
 about();
 closegraph();
 printf("A_CIRCLE..program for generating circle by Ajay.\n");
 printf("Program normally terminated.\n");
}
/*FUNCTION TO DRAW CIRCLE*/
drawcircle(int x,int y,int ra)
{
 int d,xc,yc;
 xc=x;
 yc=y;
 x=0;
 y=ra;
 d=1-ra;
 while(x<=y)
 {
  if(d<0)
  {
   x++;
   d=d+2*x+1;
  }
  else
  {
   x++;
   y--;
   d=d+2*x+1-2*y;
  }
  plot(x,y,xc,yc);
 }
}

/*FUNCTION TO TURN ON PIXELS*/
plot(int x,int y,int xc,int yc)
{
 putpixel(x+xc,y+yc,RED);
 putpixel(-x+xc,y+yc,WHITE);
 putpixel(x+xc,-y+yc,MAGENTA);
 putpixel(-x+xc,-y+yc,CYAN);
 putpixel(y+xc,x+yc,YELLOW);
 putpixel(-y+xc,x+yc,YELLOW);
 putpixel(y+xc,-x+yc,WHITE);
 putpixel(-y+xc,-x+yc,RED);
}

/*FUNCTION FOR INTRODUCTORY COMMENTS*/
cirgen()
{
 printf("\t\t    Üßßß  ßßÛßß  ÛßßßÜ   Üßßß  Û      Ûßßßß \n");
 printf("\t\t   Û        Û    Û   Û  Û      Û      Û     \n");
 printf("\t\t   Û        Û    ÛßßßÜ  Û      Û      Ûßßß  \n");
 printf("\t\t    ßÜÜÜ  ÜÜÛÜÜ  Û   Û   ßÜÜÜ  ÛÜÜÜÜ  ÛÜÜÜÜ \n");
}

/*FUNCTION FOR DISPLAYING ABOUT*/
about()
{
 printf("\n\t\t                °±²Û®CIRCLE¯Û²±°\n");
 printf("\n\t\t          PROGRAM FOR GENERATING CIRCLE\n");
 printf("\n\t\t                       BY\n");
 printf("\n\t\t                 AJAY S. KUSHARE\n");
 printf("\n\t\t        T.Y DIPLOMA COMPUTER ENGINEERING\n");
 printf("\n\t\t     BABASAHEB GAWDE INSTITUTE OF TECHNOLOGY");
 delay(9000);
 blackout();
 clrscr();
 cleardevice();
}

startgr()
{
 printf("\n\n\n\n\n\n\n\n\n\n");
 printf("\n\t\t     PROGRAMMING LOGIC & PROGRAM DEVOLOPMENT\n");
 printf("\n\t\t     ßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßß\n\n");
 printf("\n\t\t                       BY\n\n");
 printf("\n\t\t                 AJAY S. KUSHARE\n");
 delay(4000);
 blackout();
 clrscr();
 cleardevice();
 printf("\n\n\n\n\n\n\n\n\n\n");
 printf("\n\t\t    GRAPHICS, PROGRAM DESIGN & SCREEN EFFECTS \n");
 printf("\n\t\t    ßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßß\n\n");
 printf("\n\t\t                       BY\n\n");
 printf("\n\t\t               SHEKHAR A. SHERIKAR\n");
 delay(6000);
 blackout();
 clrscr();
 cleardevice();
}

/*FUNCTION FOR BLACK SCREEN COLOR FILL*/
blackout()
{
 int i,j;
 for(i=0;i<480;i++)
 {
  for(j=0;j<640;j++)
  {
   putpixel(j,i,BLACK);
  }
 }
}

/*FUNCTION FOR BLUE SCREEN COLOR FILL*/
blueout()
{
 int i,j;
 for(i=0;i<480;i++)
 {
  for(j=0;j<640;j++)
  {
   putpixel(j,i,BLUE);
  }
 }
}

delay(int time)
{
 int i,j,p=0;
 for(i=0;i<22000;i++)
 {
  for(j=0;j<time;j++)
   p++;
 }
}

/*FUNCTION FOR LOOP CONTROL*/
cont()
{
 char as;
 printf("\n\n\n\n\t\t\t   WANT TO DRAW ANOTHER?²Y/N² ¯ ");
 as=getch();
 if(as==78||as==110)
  return(1);
 else
  return(0);
}

/*FUNCTION FOR GENERATING HORIZONTAL BAR*/
horbar(int j)
{
 int i;
 for(i=0;i<j;i++)
   printf("ß");
}

/*FUNCTION FOR MESSEGE ON EXITTING*/
exitmod()
{
 printf("\n\n\n\n\n\n\n\n\n\n\n\n\n");
 printf("\t\t\t  ÛßßßßßßßßßßßßßßßßßßßßßßßßßßßÛ\n");
 printf("\t\t\t  Û        THANK YOU!         Û\n");
 printf("\t\t\t  ßßßßßßßßßßßßßßßßßßßßßßßßßßßßß\n");
 delay(9000);
}

eval()
{
 int i;
 printf("\n\t\t     ÛßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßÛ");
 printf("\n\t\t     Û             PLOTTING             Û");
 printf("\n\t\t     Û           PLEASE WAIT!           Û");
 printf("\n\t\t     ÛÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÛ");
 printf("\n\t\t                                         ");
 printf("\n\t\t     0%------------------------------100%");
 printf("\n\t\t     ß                                  ß");
 printf("\n\t\t     ");
 for(i=0;i<36;i++)
 {
  printf("²");
  delay(200);
 }
 delay(200);
}