In the first stage, you have to add delegates. While you could put these into a separate file, for our purposes let's just place them here. So, enter the following above the line beginning with public partial class...
:
public delegate bool Compare(double x, double y);
Remember, delegates are function or method wrappers, actually. Then, directly below this line, enter the following:
public delegate double Multiply(double x, double y);
You can see here that we have two delegates. One returns a Boolean
data type, and the other one returns a double
data type.
Next, inside the event handler for Button1_Click
, we'll make two variables: x
(which we set to 10
), and y
, which equals 25
. So, enter the following between the set of curly braces:
double x = 10, y = 25;