do hoa 2

#include <cstdlib>
#include <iostream>
#include <graphics.h>
#include <stdlib.h>
#include <stdio.h>
#include <conio.h>
#include "windows.h"
using namespace std;
void KhoiTaoDohoa()
{
    int driver=0,mode;
    initgraph(&driver,&mode,"");
}
void bcir(int xc, int yc, int Radius, int color)
{
  int x, y, d;
  x = 0;  y = Radius;
  d = 3 - 2 * Radius;
  while (x <= y)
{
       putpixel(xc + x, yc + y, color);
       putpixel(xc - x, yc + y, color);
       putpixel(xc + x, yc - y, color);
       putpixel(xc - x, yc - y, color);
       putpixel(xc + y, yc + x, color);
       putpixel(xc - y, yc + x, color);
       putpixel(xc + y, yc - x, color);
       putpixel(xc - y, yc - x, color);
       if (d < 0)
            d+=4*x+6;
       else       {
            d+=4*(x-y)+10;
            y--;
       }
       x++;
  }
}

void bline(int x1,int y1,int x2,int y2,int color)
// 0<m<1
{
 int x_max,x,y;
 int dx=abs(x1-x2);
 int dy=abs(y1-y2);
 int c1=2*dy;
 int c2=2*(dy-dx);
 int p=2*dy-dx;
 if (x1>x2)
 {
   x=x2; y=y2; x_max=x1;
 }
 else
  {
            x=x1; y=y1; x_max=x2;
  }
 putpixel(x,y,color);
 delay(5);
 while (x < x_max)
 {
  x=x+1;
  if (p<0) p=p+c1;
  else
        {
        y=y+1;
        p=p+c2;
        }
   putpixel(x,y,color);
    delay(5);
 }
}
int main(int argc, char *argv[])
{
    KhoiTaoDohoa();
    setbkcolor(1);
    setcolor(7);
    line(1,100,800,100);
    delay(1000);
    //bline(1,100,800,100,2);
    for (int i=1;i<=35;i++)
    {
    delay(2);
    setcolor(7);
    circle(300,300,i*5);
    delay(50);
    setcolor(BLACK);
    circle(300,300,i*5);
    };
            //bline(1,100,800,100,2);
    for (int i=35;i>=1;i--)
    {
    delay(2);
    setcolor(9);
    circle(300,300,i*5);
    delay(50);
    setcolor(BLACK);
    circle(300,300,i*5);
    };
     for (int i=1;i<=35;i++)
    {
    delay(2);
    setcolor(4);
    circle(300,300,i*5);
    delay(50);
    setcolor(BLACK);
    circle(300,300,i*5);
    };
             //bline(1,100,800,100,2);
    for (int i=35;i>=1;i--)
    {
    delay(2);
    setcolor(12);
    circle(300,300,i*5);
    delay(50);
    setcolor(BLACK);
    circle(300,300,i*5);
    };
    for (int i=17;i>=1;i--)
        {
        setcolor(i);
        setfillstyle(i%12,i%11);
        bcir(300,300,10*i,i);
        floodfill(300,300+6*i,i);
        delay(90);
        };
srand(time(NULL));
   int i=0;

  while (i<400)
  {
   putpixel(rand()%800, rand()%800, WHITE);
   delay(5);
  i++;
  }
    setcolor(7);                   // set text color
    outtextxy(250,100,"DRAW CIRCLES");// print text in window graphics
    /*setcolor(6);
    line(300,120,500,180);
    delay(50);
    line(100,180,300,120);
    delay(50);
    line(100,180,500,180);
    setcolor(6);
    line(160,180,160,400);
    delay(50);
    line(440,180,440,400);
    delay(50);
    line(160,400,440,400);
    setcolor(6);
    rectangle(250,240,350,399);
    setfillstyle(1,RED);
    floodfill(300,160,6);
    setfillstyle(1,BLUE);
    floodfill(300,230,6);
    setfillstyle(1,WHITE);
    floodfill(300,360,6);
    setcolor(6);
    setfillstyle(1,YELLOW);
    rectangle(180,200,220,240);
    rectangle(420,200,380,240);
    floodfill(200,220,6);
    floodfill(400,220,6);
    line(200,200,200,240);
    line(180,220,220,220);
    line(400,200,400,240);
    line(420,220,380,220);
    line(300,240,300,399);
    line(298,240,298,399);
    setfillstyle(1,BLACK);
    circle(310,320,5);
    circle(290,320,5);
    floodfill(310,320,6);
    floodfill(290,320,6);

    setfillstyle(1,YELLOW);
    for (int i=1;i<=20;i++)
    {
             setcolor(i%13);
             circle(300,50,40);
             setfillstyle(1,i%13);
             floodfill(300,50,i%13);
             delay(1000);
};*/
    while(!kbhit()) delay(1);       // pause screen
    system("PAUSE");
    return EXIT_SUCCESS;
}