Software Applications Programming Errors and solutions.

FEATURES OF C++ Classes and Objects: Class defines the properties of an object. It is the group of similar objects. It defines data member and member functions. Variables of the class are called objects, each object has it own separate memory. Object is also called instance of a class when it is initialized. Encapsulation: It means binding of data members and member function in a class. Data hiding : We always the data members as private and member functions as public. Private members are not accessible outside the class they can only be accessed through the public member functions. Data Abstraction: We always define the essential properties of an object without going to the background details. ADT(abstract data types): A class defines only the essential properties of an object without going to the background details. Inheritance: We can inherit all the properties of a class instead of redefining all these properties again. Hence, inheritance provides the programmer with

Add a new project to you solution as class library. You can find class library under C# windows section. Name it as per your convenience. after adding, you will get a class file, with the name of you supplied. make this class public. Now you can write you logic in this class file, build it. it will create a dll file. add reference by right clicking on you main application project file select "Add reference", path of dll file. in your application, add the namespace of your class file and then call class and its methods. below is a sample class file using System; using System.Data; namespace myEncapsulatedNameSpace { public class myEncapsulatedClass { //property declaration //properties are used for passing values between application layers private string _myName = string.empty; public string myName { get { return _myName; } set { _myName = value; } public string myMethod() { return myName = "sk";