trangle.java

初学java,最近帮同学作的一些实验

public class trangle extends father{
  double ax,ay,bx,by,cx,cy;
  public trangle(double ax,double ay,double bx,double by,double cx,double cy)
  {
	this.ax=ax;this.ay=ay;
	this.bx=bx;this.by=by;
	this.cx=cx;this.cy=cy;
  }
  public double computC()
  {
	 c=computLadge(ax,ay,bx,by)+computLadge(ax,ay,cx,cy)+computLadge(bx,by,cx,cy);
	  return c;
  }
  public double computS()
  {
	  double a1=computLadge(ax,ay,bx,by);
	  double a2=computLadge(ax,ay,cx,cy);
	  double a3=computLadge(cx,cy,bx,by);
	  double p=(a1+a2+a3)/2;
	  s=Math.pow((p-a1)*(p-a2)*(p-a3),0.5);
	  return s;
  }
  public void computCenter()
  {
	  cx=(ax+bx+cx)/3;
	  cy=(ay+by+cy)/3;
  }
}