Basic Concept Of Data Strcuture

Basic Concept Of Data Strcuture

⫸ Data :

        Data is input given to a system, which is the system processes. thus data is row , unprocessed

input given to system.

                                   DATA======>>>SYSTEM=====>>>OUTPUT

  Types of Data

1]Atomic Data:

        It's  a single or non-decomposable entity.

        ex; character 'a'

               numeric '10'

2]Composite Data:

        Grouped data item which consist of  sub-fields of which is atomic.

        ex;  Phone Number

⫸Data Types:

• The set of values and the set of operations that operate on those values.
• The data storage format that a variable  can store data to perform a specific operation

Types Of Data Types:

1] Built-In Data Type

        The data types provide by programming language are known as built-in data types.

2] User-Defined Data Type

        Those data types which are defined by the user as per his requierments are called as user-defined             data types.

Types of User-Defined  Data Type

• Enumeration(enum)
• Structure
• Union

3] Derived Data Type

        Derived data types are the data types that are derived from primitive data types.

        'C' language provides derived data types such as Array, Pointer.,etc..

• Array:

1. Assign a single name to whole group.
2. For Example, int a[10];
3. Above example defines an array of a size 10.

• Pointers:

1. A pointer is a memory location that holds a memory address.
2. Pointer are efficient in handling complex data structures and data tables.
3. Pointer increase the execution speed. 
4. There are two special pointers operators  * and &.

⫸ Data Object:

• A data represents a container for data values a place where data values are strored and later retrieved.
• A data object is characterized by a set of attributes. One of the most important of which is the data type.
• Data object are the entities that actually contain the information. Data objects are the implementations of the data structure by the programmer/user.