Download e-book for kindle: Computers For Smart People by Robert S. Swiatek

By Robert S. Swiatek

A basic ebook on computing, with emphasis on what programming involves.

Table of contents
Introduction
1. components of language
2. Our programming language
3. dossier makeup
4. A record program
5. dossier access
6. application abends
7. the net account display
9. extra Modifications
10. Assigning values
11. Updating fields
12. Programming standards
13. The zip code file
14. Programming creativity
15. including documents and calling a program
16. The referred to as software and using
17. Fuzzy math
18. Deleting accounts
19. universal statements
20. Arrays
21. Down within the dumps
22. Base systems
23. Sorting bubbles
24. A software in action
APPENDIX - KEYWORDS
OPERATORS

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Sample text

Vague as these specs may be, in either case you get the idea of what needs to be done and how it is to be done is up to the programmer as well as where to place the fields on the screen. There’s quite a bit of freedom in getting the data to appear but you can understand that we don’t want a cluttered screen and it should be user friendly. After all, we don’t want to do the programming and later have some person say they are not happy with the way it looks. Actually, our goal is to have the user be so thrilled that she holds a party to celebrate the occasion.

There’s a joke in the computing business about specs written on the back of a napkin and I’m sure that some have used that medium. Our specifications can be written as Write a program to display account file fields based on the account number. It could also be Transfer the original account file report to the screen but limit it to one record at a time depending on the account number input. Vague as these specs may be, in either case you get the idea of what needs to be done and how it is to be done is up to the programmer as well as where to place the fields on the screen.

Thus we should try to eliminate this possibility and warn the operator of this error with some kind of message. Fortunately by defining the account balance as signed decimal we won’t have to worry about what is keyed since any character that is not acceptable as this type of field will not be allowed by the input statement. We can check for certain characters in either name, but the user could enter “h-o-s-e-r-s” and that would be fine, with no objection. We will assume that the operator knows what he is doing.

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