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Lecture 8 - The ADT List Create(L This creates a new empty...

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1 The ADT List • No such thing exists in C++ • Metaphor: A shopping list • Define Operations • Implement the ADT 2 Create(L) This creates a new empty list “L”. Always write a create function, even if it seems unnecessary. The C++ function Create(L) is the constructor for the class listClass. So, to create a list L, instantiate it as a variable of type listClass. listClass L; // creates a list L 3 Length(L) Tells us how many elements there are in the list L. Always write a function (like this) that permits you to find out whether the data type is “empty”, or, in some cases, “full”. The C++ function call is: x = L.Length( ); 4 Insert(L, i, newitem) This inserts the new item “newitem” at position “i” into “L”. You always need at least one function that puts something INTO an abstract data type. Sometimes you have several such functions. The C++ function call is: L.Insert(i, newitem); 5 We need to specify more about the behavior of Insert. What if we are trying to insert
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