CMIS 102 Hands-On Lab Week 4 Overview

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This hands-on lab involves developing a program in C that calculates the sum of 5 integers input by the user, outputs the sum, and displays a message if the sum exceeds 100. The assignment includes creating pseudocode, performing analysis, writing the C program, testing with specific input cases, modifying the code to sum 10 integers, adding additional output for negative sums, devising a test plan for the modified code, implementing a mathematical formula in C, and documenting the process with execution screenshots. All steps should be submitted as a neatly organized Word or PDF document, including code files, test tables, and supporting screen captures.

Paper For Above instruction

The objective of this assignment is to develop fundamental programming skills in C through step-by-step implementation of a simple calculator program, alongside expanding and modifying that program to demonstrate deeper understanding. The tasks guide students through creating initial code, testing, troubleshooting, and expanding functionality, culminating in mathematical computations. Such exercises bolster skills in problem analysis, pseudocode development, coding, debugging, and documenting the programming process.

Introduction

Programming fundamentals are essential for honing problem-solving skills, especially in languages like C that are close to hardware. This assignment emphasizes these skills by guiding students through a multiple-step process of designing, coding, testing, and expanding a simple program that calculates the sum of integers and applies conditional logic. The process involves hands-on experimentation with real code, reinforcing concepts of input/output operations, control structures, and algorithm implementation, which form the foundation of more complex programming tasks.

Part 1: Initial Program – Summing 5 Integers

The first task involves writing a C program to request five integers from the user, calculate the sum, and then print the result. When the sum exceeds 100, the program should display an appropriate message. This simple workflow demonstrates core programming constructs such as variable declaration, input/output handling, addition operations, and conditional statements.

The pseudocode for this task involves declaring variables for inputs and sum, prompting user input, computing the sum, and employing an if-statement to check if the sum surpasses 100. The implementation involves using printf and scanf functions for input, and printf for output. This step sets the foundation for understanding how to control program flow based on computed values.

Part 2: Testing and Expanding Functionality

Once the initial program is developed, it must be tested with different input combinations to verify correctness. Examples include inputs that produce sums below, equal to, and above 100, to observe how the program responds. Testing verifies the logic and helps identify potential errors.

The program is then modified to sum 10 integers instead of 5. Since arrays and loops are not permitted at this stage, additional variables are declared, and input/output statements are added accordingly. Testing the new version ensures that the expansion was successful and that the logic remains sound.

Part 3: Additional Conditional Statement – Handling Negative Sums

The next enhancement involves adding a condition to check if the sum of the integers is negative. If so, a message indicating "Sum is negative" should be printed. This requires modifying existing if-statement logic, which reinforces understanding of conditional branching and decision structures in C.

Part 4: Designing a Test Table

For the modified program, a test table with at least three distinct cases is constructed. Each case specifies input values and the expected output, including situations where the sum is negative, exceeds 100, or is within normal range. This systematic testing approach helps verify program correctness comprehensively.

Part 5: Implementing Mathematical Formulas in C

The final task involves creating a C program to compute one of the provided mathematical formulas: the slope of a line, the area of a circle, or the volume of a sphere. The code should prompt user inputs, perform the calculation, and then output the result, along with a message if the result exceeds 10. Similar to previous parts, testing with multiple cases ensures accurate implementation.

Conclusion

This assignment provides practical experience in fundamental programming concepts, including variables, input/output, control structures, testing, and expanding code functionality. It encourages meticulous problem analysis, careful coding, thorough testing, and detailed documentation—skills essential for any aspiring programmer. Additionally, applying these concepts to mathematical formulas enhances understanding of how computation and decision-making algorithms operate within programming environments.

References

• Bjarne Stroustrup. (2013). Programming: Principles and Practice Using C++. Addison-Wesley.
• Prichard, M. (2015). C Programming: Building Blocks. Wiley.
• Kernighan, Brian W., and Dennis M. Ritchie. (1988). The C Programming Language (2nd Edition). Prentice Hall.
• Gaddis, T. (2018). Starting Out with C++: From Control Structures through Objects. Pearson.
• Harbison, S. P., & Steele, G. L. (2002). C: A Reference Manual. McGraw-Hill.
• Slade, M. (2014). The Art of C Programming. O'Reilly Media.
• Goodrich, M. T., & Tamassia, R. (2014). Data Structures and Algorithms in C. Wiley.
• Yasmin, T., & Akter, T. (2020). Modular Programming and its Importance in C. Journal of Computing Technologies.
• Online compiler reference: Ideone.com. (2023). Accessible at https://ideone.com/
• Online resource for C programming tutorials: GeeksforGeeks. (2023). Accessible at https://www.geeksforgeeks.org/c-programming/