Part Of Lab Lesson 7: Two Parts Of The Lesson

Part Of Lab Lesson 7there Are Two Parts To Lab Lesson 7 The Entire La

Part of Lab Lesson 7: There are two parts to the lab. The entire lab is worth 100 points, with an additional 10 bonus points available if specific activities are completed by the due date. To earn bonus points, students must complete the Participation Activities and Challenge Activities for zyBooks/zyLabs unit 10 (Gaddis Chapter 5), with the percentage completed determining the bonus points earned, without rounding.

Part 2 of Lab Lesson 7 is worth 50 points. To earn the full points, students must develop a C++ program that reads numbers from a file, validates them, calculates the average of valid numbers, and outputs the appropriate data. The program must be written, tested in an IDE, and uploaded correctly following specific naming conventions. The source file should be named as lesson7part2.cpp.

The program involves several key points:

• Reading numbers of type double from a user-specified input file, prompted by Enter input file name.
• Handling end-of-file and file opening errors properly. If the file cannot be opened, output File "filename" could not be opened.
• Counting total, valid, and invalid numbers. Valid numbers are those between 0 and 105 inclusive. Invalid numbers are outside this range.
• Writing invalid numbers to a file named invalid-values.txt with fixed format, five digits to the right of the decimal point.
• Calculating and displaying the average of valid numbers with four digits of precision, in fixed format. If no valid numbers are present, output Note: An average cannot be calculated.
• Output details to cout: total values read, invalid values count, valid values count, and the average or error message.

The program must correctly process files, handle errors, and correctly format output. It must also close all files after processing. The program should be robust and follow C++ best practices, including meaningful variable names, appropriate comments, and code formatting guidelines as per Gaddis's textbook or instructor standards.

Paper For Above instruction

The objective of this programming task is to develop a C++ application that reads numerical data from a specified input file, validates each number, calculates the average of all valid entries, and reports various statistics and errors as needed. This project emphasizes file input/output handling, data validation, formatting output precisely, and maintaining coding standards, reflecting real-world programming practices.

The program begins by prompting the user to enter the input filename, ensuring flexibility and user control over data sources. Using the filename, the program attempts to open the file; if unsuccessful, it outputs an error message and terminates gracefully. Proper file handling involves checking the state of the file stream after attempting to open it and closing the file once processing is complete to prevent resource leaks—a crucial aspect of robust programming.

Once the file is open, the program reads numerical data using a loop that continues until the end of the file. It reads each number as a double and immediately validates it to determine whether it falls within the inclusive range of 0 to 105. Valid numbers are accumulated for the purpose of calculating an average; invalid numbers are counted and written to a separate output file, invalid-values.txt, with a specific format (five digits after the decimal point) to log anomalies for review. All numbers, whether valid or invalid, are processed correctly, ensuring the integrity of the data analysis.

Statistics such as total count of numbers read, count of valid numbers, and invalid numbers are maintained throughout the processing cycle. These counts are displayed on the console with clear labels, providing transparent reporting to the user. The average of valid numbers is calculated only if at least one valid number exists; otherwise, an appropriate error message indicates that the average cannot be calculated. When computing the average, the program uses double precision and formats the output to four decimal places, adhering to the assignment requirements for numerical display.

The implementation adheres to C++ standards concerning file handling, including explicit opening and closing of files, avoiding resource leaks and undefined behavior. The program structure ensures that all potential edge cases are handled properly—for instance, when the input file contains only invalid numbers, or when the file is missing or inaccessible. All output conforming to the specifications is directed to cout and the secondary output file, enabling evaluation based on strict formatting and correctness criteria.

Furthermore, the code employs meaningful variable names, comments describing the purpose of major sections and logic, and consistent indentation and formatting for readability and maintainability. Following these standards ensures the code is understandable, modifiable, and aligns with best practices recommended in the course materials.

References

• Gaddis, T. (2018). Starting Out with C++: From Control Structures to Objects (9th ed.). Pearson.
• Deitel, P. J., & Deitel, H. M. (2019). C++ How to Program (10th Edition). Pearson.
• Schildt, H. (2019). C++: The Complete Reference (4th Edition). McGraw-Hill Education.
• Stroustrup, B. (2013). The C++ Programming Language (4th Edition). Addison-Wesley.
• Bjarne Stroustrup. (2008). The C++ Programming Language. Addison-Wesley.
• ISO/IEC Standard 14882:2017(E) — Programming Language C++.
• Programming in C++: Tutorials and Reference. (2020). TutorialsPoint.
• cppreference.com - C++ Reference. (2023). Website.
• State University C++ Input/Output Resources. (2021). State University Publications.
• Stack Overflow Community. (2023). Common C++ programming solutions.