private Cluster_Data(float gap = 0, int sn = 0, int en = 0, Cluster_Data next_d = null)
{
this.gap = gap;
this.sn = sn;
this.en = en;
this.next_d = next_d;
}
private Cluster_Set(Cluster_Data next_d = null, float ave = 0, int num = 0, int n = 0, Cluster_Set next_c = null)
{
this.next_d = next_d;
this.ave = ave;
this.num = num;
this.n = n;
this.next_c = next_c;
}
