Bezier Curve

#include
#include
#include
int gd,gm,maxx,maxy;
float xxx[1][2]={0.0,0.0,
         };
void line1(float x2,float y2)
{
int d1,d2,d3,d4;
d1=maxx*xxx[0][0];
d2=maxy*xxx[0][1];
d3=maxx*x2;
d4=maxy*y2;
line(d1,d2,d3,d4);
xxx[0][0]=x2;
xxx[0][1]=y2;
}
bezier(float xb,float yb,float xc,float yc,float xd,float yd,int n)
{
float xab,yab,xbc,ybc,xcd,ycd;
float xabc,yabc,xbcd,ybcd;
float xabcd,yabcd;
if (n==0)
    {
     line1(xb,yb);
     line1(xc,yc);
     line1(xd,yd);
    }
else
    {
     xab = (xxx[0][0]+xb)/2;
     yab = (xxx[0][1]+yb)/2;
     xbc = (xb+xc)/2;
     ybc = (yb+yc)/2;
     xcd = (xc+xd)/2;
     ycd = (yc+yd)/2;
     xabc = (xab+xbc)/2;
     yabc = (yab+ybc)/2;
     xbcd = (xbc+xcd)/2;
     ybcd = (ybc+ycd)/2;
     xabcd = (xabc+xbcd)/2;
     yabcd = (yabc+ybcd)/2;
     n=n-1;
     bezier(xab,yab,xabc,yabc,xabcd,yabcd,n);
     bezier(xbcd,ybcd,xcd,ycd,xd,yd,n);
    }
}
void igraph()
    {
    detectgraph(&gd,&gm);
    if(gd<0)
        {
        puts("CANNOT DETECT A GRAPHICS CARD");
        exit(1);
        }
    initgraph(&gd,&gm,"c:\\tc\\bgi");
    }
main()
    {
    igraph();
    maxx = getmaxx();
    maxy = getmaxy();
    xxx[0][0] = 0.5;
    xxx[0][1] = 0.5;
    setcolor(12);
    bezier(0.15,0.5,0.25,0.2,0.5,0.5,8);
    setfillstyle(1,12);
    floodfill(0.45*maxx,0.45*maxy,12);
    xxx[0][0] = 0.5;
    xxx[0][1] = 0.5;
    setcolor(12);
    bezier(0.35,0.3,0.6,0,0.5,0.5,4);
    setfillstyle(1,12);
    floodfill(0.5*maxx,0.45*maxy,12);
    xxx[0][0] = 0.5;
    xxx[0][1] = 0.5;
    setcolor(12);
    bezier(0.90,0.45,0.64,0.2,0.5,0.5,4);
    setfillstyle(1,12);
    floodfill(0.55*maxx,0.45*maxy,12);
    xxx[0][0] = 0.5;
    xxx[0][1] = 0.5;
    setcolor(12);
    bezier(0.15,0.6,0.25,0.87,0.5,0.5,4);
    setfillstyle(1,12);
    floodfill(0.45*maxx,0.55*maxy,12);
    xxx[0][0] = 0.5;
    xxx[0][1] = 0.5;
    setcolor(12);
    bezier(0.85,0.75,0.57,0.8,0.5,0.5,4);
    setfillstyle(1,12);
    floodfill(0.55*maxx,0.55*maxy,12);
    xxx[0][0] = 0.5;
    xxx[0][1] = 0.5;
    setcolor(2);
    bezier(0.5,0.75,0.57,0.8,0.5,1,4);
    setcolor(14);
    circle(0.5*maxx,0.5*maxy,10);
    setfillstyle(11,14);
    floodfill(0.5*maxx,0.5*maxy,14);
    xxx[0][0] = 0.534;
    xxx[0][1] = 0.9;
    setcolor(2);
    bezier(0.85,0.75,0.57,0.78,0.534,0.9,4);
    setfillstyle(2,2);
    floodfill(0.60*maxx,0.85*maxy,2);
    getch();
    closegraph();
    }