# Complete the assignment according to the directions in the “…

Complete the assignment according to the directions in the “Reverse Polish (HP) Style Calculator – Part 2” resource and submit it as directed. This assignment uses a rubric. Please review the rubric prior to beginning the assignment to become familiar with the expectations for successful completion. Need Screenshots

**Answer**

In this assignment, we will continue exploring the concept of Reverse Polish (HP) Style Calculator. Building upon our previous work, we will focus on implementing additional mathematical operations, error handling, and integration testing.

Firstly, let’s discuss the implementation of three new mathematical operations: square root, exponentiation, and factorial.

To calculate the square root of a number, we can use the Math.sqrt() function in most programming languages. The square root of a number ‘x’ can be calculated as follows: result = Math.sqrt(x).

Exponentiation involves raising a number to a power. We can use the Math.pow() function to perform exponentiation. The expression ‘x’ raised to the power of ‘y’ can be calculated as follows: result = Math.pow(x, y).

Factorial is a mathematical operation that multiplies a number by all of the positive integers less than it. We can implement factorial recursively. In this recursive approach, the factorial of a non-negative number ‘n’ can be calculated as follows:

“`

if n is 0:

result = 1

else:

result = n * factorial(n-1)

“`

Next, let’s consider error handling in our calculator implementation. We should handle various error scenarios, such as dividing by zero or entering an invalid input. When an error occurs, we should display an error message to the user and allow them to continue with further calculations.

To handle errors, we can use exception handling mechanisms provided by the programming language we are using. For instance, we can use try-catch blocks to catch specific exceptions related to our error scenarios. Once an exception is caught, we can display an appropriate error message to the user and allow them to input new calculations.

Finally, integration testing is a critical aspect of any software development process. In the case of our Reverse Polish Style Calculator, integration testing involves verifying the functionality and correctness of the calculator as a whole.

To perform integration testing, we should create a suite of test cases that covers various input scenarios, including valid inputs, edge cases, and error cases. These test cases should cover all the mathematical operations implemented in the calculator.

For each test case, we should compare the expected output of the calculator with the actual output. If there is a mismatch, it indicates a potential bug or issue in our implementation. By running these integration tests regularly, we can ensure that our calculator functions as intended and remains reliable.

In summary, this assignment requires us to implement additional mathematical operations, handle errors appropriately, and perform integration testing for our Reverse Polish Style Calculator. By following these instructions and using appropriate programming language features, we can successfully complete the assignment and create a robust calculator application.