8 replies to this topic

[KevzJD]

Hi, I'm on the MDSN on c# for kids on the OOP bit (calling a method ).

class Person

    {

        public string firstName;

        public string lastName;


        public void showFullName()

        {

            Console.WriteLine("Name is " + this.firstName + " " + this.lastName);

        }

    }

When trying to call a instance of this object by doing

    class Person

    {

        public string firstName;

        public string lastName;


        public void showFullName()

        {

            Console.WriteLine("Name is " + this.firstName + " " + this.lastName);

        }

    }


    Person Kevin;

    Kevin = new Person();


}

It doesnt seem to recognize the Person object? It highlights in red as if it doesnt exist. Please help?

[gregwarner]

Where did you put the "Person Kevin;" declaration? Is it in another source file in a main method, or is it literally under the class definition as depicted above? It should be in a main method somewhere.

[Momerath]

Your code looks to be outside of a class. You can't put code outside of a class.

[KevzJD]

Ah i see, so you need to declare the object within the class it was made?

[Momerath]

No, it doesn't have to be in the class that declares it, but it has to be within a class. For example

class MyClassA {

    public int PropertyA { get; set; }

    public int MethodA(int mul) {

        return mul * PropertyA;

    }

}


class MyClassB {

    MyClassA myFirstA = new MyClassA();


    public void MyBMethod() {

        MyClassA mySecondA = new MyClassA();


        myFirstA.PropertyA = 3;

        mySecondA.PropertyA = 12;

        Console.WriteLine("The value is {0}", myFirstA.MethodA(4));

        Console.WriteLine("The other value is {0}", mySecondA.Method(1));

    }

}

Notice that everything is inside a class. That's one of the 'rules' for object oriented programming, everything belongs to a class.

[KevzJD]

Ah right i see, that makes sence thanks Momerath. Do you have any good tutorials for beginners starting out with C#?

[Tonchi]

what is different between class and structure???

[gregwarner]

Tonchi said:

what is different between class and structure???

Refer to this thread for the answer:
http://forum.codecal...s-struct-c.html

[Tonchi]

tnx