CS214_Fall2015_LN3_Stacks - CS 214 DATA STRUCTURES FALL...

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CS 214 DATA STRUCTURES FALL 2015 Lecture 3 Stacks 19 th October 2015 Group A Dr. Mai Hamdalla [email protected]
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House Keeping Lecture and Lab Attendance Syllabus Piazza Signed up? Questions/Concerns should be posted there. Implementation Environment Code Blocks
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Abstract Data Type (ADT) Is a type defined in terms of its data items and associated operations , not it’s implementation. ADT = Organized data + Operations
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Why ADT? The implementation of the component can be changed without affecting some other component. The user only has to study the interface at a much higher level, rather than having to understand the detailed implementation of the set operations.
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STACKS
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What is a Stack?
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What is a Stack? Stack is LIFO Structure [Last in First Out] Stack is Ordered List of Elements of Same Type . Stack is a Linear List. In Stack, all Operations are permitted at only one end called Top.
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Stack Example - Trace the following example showing the how the
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