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Chapter 2, Problem 14RQ

Explanation of Solution

Relational Diagram:

  • A relational diagram refers to a visual representation of the relational database’s entities, the relationships between those entities, and the attributes within those entities.
  • Therefore, it makes it easy to understand what the entities represent, what types of relationships exist and how these relationships are implemented.

Example of Relational Diagram:

  • The relational diagram given below shows the connecting fields that is, “AGENT_CODE” through 1:M relationship type.
  • To illustrate simple relational diagrams, use MS Access, Database tools, and “relationships” options on the main Access menu...

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Write a program that simulates a Magic 8 Ball, which is a fortune-telling toy that displays a random response to a yes or no question. In the student sample programs for this book, you will find a text file named 8_ball_responses.txt. The file contains 12 responses, such as “I don’t think so”, “Yes, of course!”, “I’m not sure”, and so forth. The program should read the responses from the file into a list. It should prompt the user to ask a question, then display one of the responses, randomly selected from the list. The program should repeat until the user is ready to quit. Contents of 8_ball_responses.txt:  Yes, of course! Without a doubt, yes. You can count on it. For sure! Ask me later. I'm not sure. I can't tell you right now. I'll tell you after my nap. No way! I don't think so. Without a doubt, no. The answer is clearly NO. (You can access the Computer Science Portal at www.pearsonhighered.com/gaddis.)
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