Program for DDA circle algorithm.

#include stdio.h
#include conio.h
#include graphics.h
#include math.h

void main()
{
float x1,y1,x,y,e;
int gd,gm=DETECT,i,val,r;
clrscr();
printf("Enter the radius\t");
scanf("%d",&r);
detectgraph(&gd,&gm);
initgraph(&gd,&gm,"c:\\tc\\bgi");
i=0;
do
{
val=pow(2,i);
i++;
}while(vale));
getch();
closegraph();
}