我已经尝试了几件事情要修正这个错误,我只是似乎无法弄清楚这一个,我将不胜感激任何帮助,没有合适的方法。这个错误出现在Triangle和Square类中,Triangle中的错误是“没有从GeometricFigure实现继承的抽象成员”和“没有合适的方法被覆盖”,而Square只有“找不到合适的方法覆盖”错误。找到重写C#
namespace ShapesDemo
{
class Program
{
static void Main(string[] args)
{
Rectangle rec = new Rectangle(8,10);
Square squ = new Square(11, 12);
Triangle tri = new Triangle(10, 20);
Console.WriteLine("Computed area is {0}" + "\n\n" + "Computed Triangle is: {1}" + "\n", squ.ComputeArea(rec.Area), tri.ComputeArea(rec.Area));
}
}
abstract class GeometricFigure
{
public decimal _height, _width, _area;
public decimal Height
{
get { return _height; }
set { _height = value; }
}
public decimal Width
{
get { return _width; }
set { _width = value; }
}
public decimal Area
{
get { return _area; }
}
public abstract decimal ComputeArea();
}
class Rectangle : GeometricFigure
{
private decimal height, width;
public Rectangle(decimal sideA, decimal sideB)
{
this.height = sideA;
this.width = sideB;
}
public Rectangle()
{
}
public override decimal ComputeArea()
{
Console.WriteLine("The Area is" + _width.ToString(), _height.ToString());
return width * height;
}
}
class Square : Rectangle
{
public Square(decimal sideA, decimal sideB)
{
this._width = sideA;
this._height = sideB;
if (sideA != sideB)
this._height = this._width;
}
public Square(decimal xy)
{
this._width = xy;
this._height = this._width;
}
public override decimal ComputeArea(decimal _area)
{ return _area = this._width * this._height; }
}
class Triangle : GeometricFigure
{
public Triangle(int x, int y)
{
this.Width = x;
this.Height = y;
}
public override decimal ComputeArea(decimal _area)
{ return _area = (this.Width * this.Height)/2; }
}
}
值得强调的是,删除参数作为答案说可以解决您的问题*,而且如果它按照您目前的工作方式工作,将无法按预期工作。* _area不需要重新声明你的方法参数,因为它已经是一个类字段。你现在所拥有的是在功能范围内分配给_area的第二个声明,它基本上什么都不做,因为它对类字段没有做任何事情,而是在方法中分配给_area的本地声明。 – 2012-02-27 00:17:03