CG_koch curve

#include<conio.h>
#include<graphics.h>
#include<stdio.h>
#define SIN 0.86602540
void koch1(int x1,int y1,int x2,int y2,int m)
{
    int x[5],y[5];
    int lx,ly,offx=50,offy=300,xx,yy;
        lx=(x2-x1)/3;
    ly=(y2-y1)/3;
    x[0]=x1;
    y[0]=y1;
    x[4]=x2;
    y[4]=y2;

    x[1]=x[0]+lx;
    y[1]=y[0]+ly;
    x[3]=x[0]+2*lx;
    y[3]=y[0]+2*ly;
    xx=x[3]-x[1];
    yy=y[3]-y[1];
    x[2]=xx*0.5+yy*(SIN);
    y[2]=-(xx)*SIN+yy*0.5;
    x[2]=x[2]+x[1];
    y[2]=y[2]+y[1];

    if(m>0)
    {
        koch1(x[0],y[0],x[1],y[1],m-1);
        koch1(x[1],y[1],x[2],y[2],m-1);
        koch1(x[2],y[2],x[3],y[3],m-1);
        koch1(x[3],y[3],x[4],y[4],m-1);
    }
    else
    {
        line(offx+x[0],offy+y[0],offx+x[1],offy+y[1]);
        line(offx+x[1],offy+y[1],offx+x[2],offy+y[2]);
        line(offx+x[2],offy+y[2],offx+x[3],offy+y[3]);
        line(offx+x[3],offy+y[3],offx+x[4],offy+y[4]);
    }

}
/*
void koch1(int x1,int y1,int x2,int y2,int m)
{

int xx,yy,x[5],y[5],lx,ly,offx=50,offy=300;

lx=(x2-x1)/3;
ly=(y2-y1)/3;
//printf("hello'");
x[0]=x1;
y[0]=y1;
x[4]=x2;
y[4]=y2;
x[1]=x[0]+lx;
y[1]=y[0]+ly;
x[3]=x[0]+2*lx;
y[3]=y[0]+2*ly;
xx=x[3]-x[1];
yy=y[3]-y[1];
x[2]=xx*0.5+yy*(SIN);
y[2]=-(xx)*SIN+yy*0.5;
x[2]=x[2]+x[1];

y[2]=y[2]+y[1];
if(m>0)
{
    koch1(x[0],y[0],x[1],y[1],m-1);
    koch1(x[1],y[1],x[2],y[2],m-1);
    koch1(x[2],y[2],x[3],y[3],m-1);
    koch1(x[3],y[3],x[4],y[4],m-1);
    }
    else
    {
    line(offx+x[0],offy+y[0],offx+x[1],offy+y[1]);
    line(offx+x[1],offy+y[1],offx+x[2],offy+y[2]);
    line(offx+x[2],offy+y[2],offx+x[3],offy+y[3]);
    line(offx+x[3],offy+y[3],offx+x[4],offy+y[4]);
    }

}*/

void main()
{
    int gd=DETECT,gm;
    int n;
    int x1=0,y1=0,x2=550,y2=0;
    initgraph(&gd,&gm,"C:\\tc\\bgi");
    printf("enter n");

    scanf("%d",&n);
    printf("%d",n);
    koch1(x1,y1,x2,y2,n);
    getch();
}