Program to design flowerpot

#include<stdio.h>
#include<dos.h>
#include<graphics.h>
#include<stdlib.h>
#include<math.h>
#include<conio.h>
#define PI 3.14159
#define NUME 30
#define DENOM 100
#define NUMBER 7
#define RAD 2.0
#define DTHETA 0.1
#define REDUX 3
#define SEGS 60
#define MIN 1
void init_graph();
void tdisplay(int, float, int, int, int);
void cdisplay(int, int, int);
void bucket();
int gd, gm, maxcolor, errorcode;
int xo, yo, maxx, maxy, xasp, yasp;
double aspectratio;
void init_graph()
{
    detectgraph(&gd, &gm);
    initgraph(&gd, &gm, "");
    errorcode = graphresult();
    if (errorcode != grOk) {
 printf("graphics system eror : %s", grapherrormsg(errorcode));
 exit(1);
    }
    maxcolor = getmaxcolor() + 1;
    getaspectratio(&xasp, &yasp);
    aspectratio = (double) (yasp) / (double) (xasp);
    maxx = getmaxx();
    maxy = getmaxy();
}

void cdisplay(int size, int x, int y)
{
    int i, rc;
    float theta;
    for (i = 0; i < NUMBER; i++) {
 theta = i * 2 * PI / NUMBER;
 rc = random(16);
 tdisplay(size, theta, x, y, rc);
    }
}

void tdisplay(int size, float theta, int x, int y, int rcolor)
{
    int i, chg, newsize;
    for (i = 0; i < size; i++) {
 chg = (random(DENOM) < NUME) ? -1 : 1;
 theta += chg * DTHETA;
 x += RAD * sin(theta);
 y += RAD * cos(theta);
 if (size < 4)
     setcolor(rcolor);
 else if (size < 13)
     setcolor(GREEN);
 else if (size < 40)
     setcolor(LIGHTGREEN);
 else
     setcolor(YELLOW);
 lineto(x, y);
    }
    if (size > MIN) {
 newsize = size / REDUX;
 cdisplay(newsize, x, y);
    }
}

void bucket()
{
    setcolor(WHITE);
    ellipse(xo, yo, 0, 360, 30, 9);
    setfillstyle(SOLID_FILL, RED);
    fillellipse(xo, yo, 30, 9);
    setfillstyle(LTBKSLASH_FILL, BROWN);
    ellipse(xo + 30, yo + 28, 90, 252, 12, 25);
    delay(1150);
    ellipse(xo - 30, yo + 28, -70, 94, 12, 25);
    delay(1150);
    ellipse(xo + 25, yo + 83, -69, 90, 12, 30);
    delay(1150);
    ellipse(xo - 25, yo + 83, 88, 252, 12, 30);
    delay(1150);
    ellipse(xo, yo + 116, 151, 388, 32, 9);
    delay(1150);
    floodfill(xo, yo + 50, WHITE);
}

void main()
{
    int size;
    init_graph();
    xo = maxx >> 1;
    yo = (maxy >> 1) - 80;
    xo++;
    yo++;
    bucket();
    randomize();
    size = SEGS;
    delay(1150);
    cdisplay(size, xo, yo);
    getch();
    closegraph();
}