书上练习题:说是下面这段代码可以编译,就是不能像预期一样工作,让找出有关问题所在
书上练习题:说是下面这段代码可以编译,就是不能像预期一样工作,让找出问题所在
书上练习题:说是下面这段代码可以编译,就是不能像预期一样工作,让找出问题所在:
看了半天没看出来,大家伙帮忙看看,不知道是哪儿有问题呀
------解决方案--------------------
public bool ArePointsCoincident(XYZ otherXYZ)
{
return (X == otherXYZ.X && Y == otherXYZ.Y && Z == otherXYZ.Z);
}
public double X
{
get { return m_X; }
}
public double Y
{
get { return m_Y; }
}
public double Z
{
get { return m_Z; }
}
private double m_X, m_Y, m_Z;
这里的m_x m_y m_z 一直为0 没看到给他们赋值的地
------解决方案--------------------
既然能编译，自己运行单步跟踪一下不就行了？
书上练习题:说是下面这段代码可以编译,就是不能像预期一样工作,让找出问题所在:
namespace BuildingLibrary
{
class PropertyLine
{
bool SharesEndpointWith(PropertyLine other)
{
XYZ startPoint = other.GetEndPoint(0);
XYZ endPoint = other.GetEndPoint(1);
return startPoint.ArePointsCoincident(m_startPoint) ||
endPoint.ArePointsCoincident(m_endPoint);
}
XYZ GetEndPoint(int index)
{
return (index == 0 ? m_startPoint : m_endPoint);
}
private XYZ m_startPoint;
private XYZ m_endPoint;
}
class XYZ
{
public bool ArePointsCoincident(XYZ otherXYZ)
{
return (X == otherXYZ.X && Y == otherXYZ.Y && Z == otherXYZ.Z);
}
public double X
{
get { return m_X; }
}
public double Y
{
get { return m_Y; }
}
public double Z
{
get { return m_Z; }
}
private double m_X, m_Y, m_Z;
}
}
看了半天没看出来,大家伙帮忙看看,不知道是哪儿有问题呀
------解决方案--------------------
public bool ArePointsCoincident(XYZ otherXYZ)
{
return (X == otherXYZ.X && Y == otherXYZ.Y && Z == otherXYZ.Z);
}
public double X
{
get { return m_X; }
}
public double Y
{
get { return m_Y; }
}
public double Z
{
get { return m_Z; }
}
private double m_X, m_Y, m_Z;
这里的m_x m_y m_z 一直为0 没看到给他们赋值的地
------解决方案--------------------
既然能编译，自己运行单步跟踪一下不就行了？