An Abstract data type (ADT) combines the description of data structure, and associated operations
ADT has following characteristics:
Abstract Data Types Part (2) Coming..
ADT has following characteristics:
- Provides a description of element in terms of data types
- Defines relationship among individual elements
- Valid operations and parameters to be passed
- Error conditions associated with the operations
For Example an ADT stack can be defined by pakaging together the following operations
- Push - Inserts an item into the stack stk
- Pop - Returns a data item from stack stk
- Peek() - Returns top most element with out removing it from the stack
- Size() - Returns no of elements currently in the stack
- isEmpty() - Returns true if stack is empty, and false otherwise
- Set of operations associated with ADT is called interface
- Elements of ADT data structure are manipulated through an interface
- The figure shows how elements of ADT are accessed using interface
- Implementation of operations and data items are hidden from the application program
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