cg13

#include <iostream>
#include <math.h>
#include <graphics.h>
using namespace std;
class kochCurve
{
public:
void koch(int it, int x1, int y1, int x5, int y5)
{
int x2, y2, x3, y3, x4, y4;
int dx, dy;
if (it == 0)
{
line(x1, y1, x5, y5);
}
else
{
delay(10);
dx = (x5 - x1) / 3;
dy = (y5 - y1) / 3;
x2 = x1 + dx;
y2 = y1 + dy;
x3 = (int)(0.5 * (x1 + x5) + sqrt(3) * (y1 - y5) / 6);
y3 = (int)(0.5 * (y1 + y5) + sqrt(3) * (x5 - x1) / 6);
x4 = 2 * dx + x1;
y4 = 2 * dy + y1;
koch(it - 1, x1, y1, x2, y2);
koch(it - 1, x2, y2, x3, y3);
koch(it - 1, x3, y3, x4, y4);
koch(it - 1, x4, y4, x5, y5);
}
}
};
int main()
{
kochCurve k;
int it;
cout << "Enter Number Of Iterations : " << endl;
cin >> it;
int gd = DETECT, gm;
initgraph(&gd, &gm, NULL);
k.koch(it, 150, 20, 20, 280);
k.koch(it, 280, 280, 150, 20);
k.koch(it, 20, 280, 280, 280);
getch();
closegraph();
return 0;
}