【菜鸟求助】程序错误,求大师指点,不甚感激。
新手学习Java,按照书上所说写了如下程序,目的是求两个点之间的距离。
public class point
{ public double x,y;
public double distance(point that)
{double xdiff,ydiff;
xdiff=x-that.x;
ydiff=y-that.y;
return Math.sqrt(xdiff*xdiff+ydiff*ydiff);
}
point point1=new point();
point point2=new point();
point1.x=0.0;
point1.y=0.0;
point2.x=5.0;
point2.y=10.0;
d=point1.distance(point2);
System.out.println(d);
}
编译时提示倒数第3行至倒数第六行的x和y有错误。