public canshu xielv(zuobiao shou, zuobiao wei)//求斜率
{
double k, b;
canshu newcs = new canshu();
k = (wei.y - shou.y) / (wei.x - shou.x);
b = shou.y - k * shou.x;
newcs.k = k;
newcs.b = b;
return(newcs);
}
public double distance(zuobiao dot, canshu cs)//求点到直线距离
{
double dis = (Math.Abs(cs.k * dot.x - dot.y + cs.b)) / Math.Sqrt(cs.k * cs.k + 1);
return(dis);
}
