***مهندسی کامپیوتر***

do

}

putpixel(h+x,(k+y

putpixel(h+y+,(k+x

putpixel(h+y,(k-x

putpixel(h+x,(k-y

putpixel(h-x,(k-y

putpixel(h-y,(k-x

putpixel(h-y,(k+x

x++

if(p<0

p+=(2*x)+1

else

}

y--

p+=(2*(x-y))+1

{

while(x<=y

{

putpixel(h-x,(k+y