C＃委托字符串和双精度数组

Question

I got a problem, I'm studying С# . I'm begginer then.

I have 1 abstract class Figure and 2 classes inherited: Circle and Rectangle

On each class, I calculate the surface of each figure.

And I have to return SurfaceTotal = Circle.Surface() + Rectangle.Surface()

My problem is I need to have this surface with other string values in my array for display them in the console.

See some function to understand it:

From Figure :

 abstract public double Surface();

From Rectangle :

public override double Surface()
  {
     double resultat = longueur * largeur;  
     return resultat;
  }

From Circle :

public override double Surface()
{
    double resultat = Math.PI * (rayon * rayon);
    return resultat; 
}

So I decide to use delegate for it,

public delegate string resultat();

and then I did this array :

resultat[] res = new resultat[4];

            res[0] = new resultat(rectangle.Informations);
            res[1] = new resultat(cercle.Informations);
            res[2] = new resultat(rectangle.Surface);
            res[3] = new resultat(cercle.Surface);

And for the display :

        Console.WriteLine("Rectangle centré au point  : {0} \n", res[0]());
        Console.WriteLine("Cercle centré au point  : {0} \n", res[1]());
        Console.WriteLine("Surface total   : {0} \n", res[2]() + res[3]());

The problem is : in res[2] and res[3] I have double values, but in the other ones I have strings values.

So like that, the values aren't added.

And I have to use 1 array, then I wanted added the 2 values before to insert in this array. But I don't know how... Do you have an idea guys ? Thanks

Answer 1

It's unclear why you are using delegates here at all. You could simply use a string array.

string[] res = new string[4];
res[0] = rectangle.Informations();
res[1] = cercle.Informations();
res[2] = rectangle.Surface().ToString();
res[3] = cercle.Surface().ToString();