Structures in C#

Question

Hi I am beginner in C# i am currently working on Structures in C# i found the following stmt in MSDN for structures in C# It is an error to declare a default (parameterless) constructor for a struct. A default constructor is always provided to initialize the struct members to their default values. i was able o catch the first sentence of it. But the second sentence i am not able to understand i tried with following example like public struct xxx { public int ik; public xxx() { i=0; /* as per second sentence i feel this should excute but its giving error */ k=0; } } can anyone help me Thanks in advance Gets

caepo3 · Answer

In addition the second sentence means that a default constructor is always provided and you cannot overload it. This default constructor always assigns the default value (e.g. i = k = 0) to the fields. In the function in which you create an instantiation of the struct just add the code xxx XXX = new xxx(); and both xxx.i and xxx.k will be set to 0. Note: You do not have to create a constructor at all (and just use the built-in default constructor) but you will get a warning for each of the fields worded something like: Field 'StructTest.xxx.k' is never assigned to and will always have its default value 0. Here is a quick example: class StructTest{ struct xxx { public int i k; public xxx(int iValue int kValue) { i = iValue; k = kValue; } } public static void Main() { xxx NParam = new xxx(); xxx Params = new xxx(5 10); System.Console.WriteLine(NParam.i); System.Console.WriteLine(NParam.k); System.Console.WriteLine(Params.i); System.Console.WriteLine(Params.k); } } The output of this program should look like: 0 0 5 10 Hope this helps!

spgilmore · Answer

It is saying that all the members of a struct must be initialized during its creation so you must take a parameter in the constructor for each member in your struct. Your members are int i and int k. That means that your constructor must be public xxx(int ivalue int kvalue) { i = ivalue; k = kvalue; } A default (parameterless) constructor is what you've used: public xxx() { }