Chapter 3 Building Physical Diagrams

Using abstract data types in a physical diagram

An abstract data type (ADT) is a user-defined data type which can encapsulate a range of data values and functions. The functions can be both defined on, and operate on the set of values.

Example

An abstract data type for the Gregorian calendar which has functions defined to do the following:

• Read and write roman numerals
• Convert dates from the Julian calendar to the Gregorian calendar
• Convert dates from the Gregorian calendar to the Julian calendar

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