Pascal Programming

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# Pascal Programming - PowerPoint PPT Presentation

Pascal Programming. Complex Array Structures. Pascal Programming. Complex solutions, using Pascal or any other language, need to be reduced from the abstract to more concrete statements.

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### Pascal Programming

Complex Array Structures

Pascal Programming
• Complex solutions, using Pascal or any other language, need to be reduced from the abstract to more concrete statements.
• The example in the text of parallel arrays to award a score and letter grade illustrates the validity of the observation.
Pascal Programming

Index 1

Index 2

Pascal Programming
• The solution to the problem arises from dual arrays with a single index.
• Thus, data type notation and data structure become tightly related.
• Data structure– any construct to store and manipulate data in a program or algorithm.
Pascal Programming
• In this solution, each array type is a data type.
• The data structure combines the two arrays.
• With these examples we know that available structures can include arrays of arrays and parallel arrays.
Pascal Programming
• Complex solutions require complex data structures.
• An array’s component type can be comprised of any data type . . .so, it can be an array type. Thus we have an array or array types.
• Consider a spreadsheet example . . .
Pascal Programming
• If we substitute Sales for 1-3 and Territory for A-C, we reference 2C as …
• Sales [2] Territory
• Within the territory we have a monthly array of sales.
• This illustrates the use of an array of array type.
Pascal Programming
• An array with more than one index is called a multidimensional array.
• The declaration follows the form use to declare a simple or one dimensional array.
• Multidimensional arrays have more than one index but they have similar other properties.