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Programming Fundamentals/Practice: Object-Oriented Programming

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The latest reviewed version was checked on 24 January 2019. There are template/file changes awaiting review.

Chapter Summary

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  • Objects and Classes
  • Encapsulation
  • Inheritance and Polymorphism

Review Questions

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Answer the following statements as either true or false:

  1. Procedural programming and object-oriented programming cannot be done with the same compiler/IDE.
  2. Object-oriented programming encapsulates data and functions.

Answers:

  1. false
  2. true

Short Answer

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  1. Describe the fundamental differences between procedural (modular structured) programming and object-oriented programming.

Activities

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Complete the following activities using your selected programming language. Use separate functions for input, each type of processing, and output. Avoid global variables by passing parameters and returning results. Create test data to validate the accuracy of each program. Add comments at the top of the program and include references to any resources used.

  1. Review MathsIsFun: Area of Plane Shapes. Create a program that asks the user what shape they would like to calculate the area for. Use if/else conditional statements to determine their selection and then gather the appropriate input and calculate and display the area of the shape. Perform all area calculations using a ShapeArea class that has separate methods to calculate and return the area for different shapes. Include data validation in the class and error handling in the main program.
  2. Create a program that asks the user how old they are in years. Then ask the user if they would like to know how old they are in months, days, hours, or seconds. Use if/else conditional statements to display their approximate age in the selected timeframe. Perform all calculations using an AgeConverter class that accepts the age in years during initialization and has separate properties and methods to calculate and return the age in months, days, hours, and seconds. Include data validation in the class and error handling in the main program.
  3. Review Wikipedia: Zeller’s congruence. Create a program that asks the user for their birthday (year, month, and day) and then calculate and display the day of the week on which they were born. Use if/else conditional statements to convert the numeric day of the week to the correct string representation (Monday, Tuesday, Wednesday, etc.). Perform all calculations using a DayOfWeek class that accepts the year, month, and day during initialization and has separate properties and methods to calculate and return the day of week as a number, as an abbreviated string (Mon, Tue, etc.), and as a full string (Monday, Tuesday, etc.). Include data validation in the class and error handling in the main program.

References

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