Cmis 102 Hands-On Lab Week 3 Overview 310294

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This assignment involves developing and experimenting with a C program that calculates the area of a right triangle based on user-inputted base and height values. The task also includes modifying the program to calculate the perimeter, creating test cases for validation, understanding specific code lines and modifications, and analyzing variable behaviors through code execution.

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The primary goal of this lab is to apply fundamental programming concepts in C to develop a simple geometrical calculator while reinforcing understanding of variables, input/output functions, and program logic. It begins with designing a program that asks the user to input the base and height of a right triangle, computes its area, and displays the result. This involves defining appropriate variables, implementing input prompts, performing calculations, and outputting results, all structured through pseudocode for clarity before coding.

In detail, the program's core logic uses sequential programming statements. Two floating-point variables, base and height, are declared to allow for precise measurements, including non-integer values. The area is calculated using the formula: Area = ½ × base × height. An example with sample inputs illustrates how different base and height values influence the resulting area, emphasizing the flexibility and accuracy of floating-point computations.

The test plan involves creating a set of test cases with predefined input values and expected outputs to verify the program's correctness. For instance, with inputs (10.1, 12.2), the expected output area is approximately 61.61. Additional test cases include varying dimensions to ensure robustness. These tests help confirm that the program adheres to the mathematical formula and handles different inputs accurately.

Next, pseudocode demonstrates the step-by-step process: declaring variables, prompting the user for base and height, computing the area, and printing the outcome. The corresponding C code reflects these steps, including essential syntax such as include directives, variable definitions, input/output functions, and the calculation logic.

Furthermore, the lab prompts experimentation with modifying the code to compute the triangle's perimeter instead of the area. This involves understanding the geometry of a triangle, where the perimeter equals the sum of all three sides. Assuming knowledge of the third side or additional inputs, the code can be adjusted accordingly. Developing a new test table with at least three cases ensures comprehensive validation of the perimeter calculation.

Understanding the line scanf("%f", &height); is critical; it reads floating-point input from the user and stores it in the variable height. To input an integer instead, the format specifier should be changed to %d, and the variable type should be changed from float to int. This alteration is necessary to match the data type and prevent input errors.

The program snippet involving calculations with integer and floating-point variables introduces nuances in variable behavior. The code assigns integer values to i and j, and floating-point variables f and g. The computation f = f + j / i; performs integer division when both operands are integers, affecting the result stored in f. Similarly, g is derived from a floating-point expression. Running the program reveals the differences in their resulting values, illustrating the importance of data types and mathematical operations in C.

Execution of this program via online compilers like ideone.com demonstrates functionality with sample inputs, with captured screenshots validating correctness. These practical steps, along with detailed explanations, contribute to understanding how input, data types, and calculations interplay in C programming.

In addition, creating additional test cases with the pseudocode provided for pricing with taxes emphasizes proficiency in designing test scenarios to cover various inputs and expected outputs. Documenting the testing process, code adjustments, and results in a neat, organized manner ensures clarity and demonstrates comprehensive learning.

Overall, this lab consolidates foundational programming skills, includes practical experimentation, and fosters analytical thinking about code behavior, correctness, and validation strategies. Proper documentation of all these activities, including code snippets, test results, and explanations, fulfills the assignment's goals effectively.

References

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• OnlineCompiler. (n.d.). ideone.com. Retrieved from https://ideone.com.
• Tucker, A. (2013). Java and C++ Programming for the Absolute Beginner. Cengage Learning.
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