Question

Show your results all planning tools (algorithm, IPO chart, desk checking, pseudocode, flowchart) for an application that allows a user to enter the price of an item and computes 6.25 percent sales tax on the item.

Answer 1

The above images describe the constant calculation, algorithm, IPO chart, pseudocode, and the flow chart for the given problem.

For desk checking, you could dry run various use-cases (with price in some currency unit) on the given algorithm as illustrated below:

1. Input price given as 100. The ST as calculated by above algorithm would be 100 * 0.0625, that is 6.25. When using a calculator for the same calculation, the answer comes out to be 6.25.
2. Input price given as 200. The ST as calculated by above algorithm would be 200 * 0.0625, that is 12.5. When using a calculator for the same calculation, the answer comes out to be 12.5.
3. Input price given as 150. The ST as calculated by above algorithm would be 150 * 0.0625, that is 9.375. When using a calculator for the same calculation, the answer comes out to be 9.375.
4. Input price given as 300. The ST as calculated by above algorithm would be 300 * 0.0625, that is 18.75. When using a calculator for the same calculation, the answer comes out to be 18.75.

You could assume other cases as well, as per your imagination and try desk checking the given algorithm.