CS $1100-$ Computer Science and Its Applications

T$4$: Conditional Logic

Use the DATE$(...)$ function to add months to the previous audit date. You are not allowed to use the EDATE$(dots)$ function.

Document your function NextAudit$\_$CSA using the design recipe linked in the syllabus prefix. Improve your function NextAudit$\_$CSA by making it modular. We want to separate the concern of the business rule from the concern of how to apply it to the data. Define a function NextAudit$2\_$CSA which takes the business rule as a function argument.

NextAudit$2\_$CSA has the arguments as shown in this LAMBDA:

LAMBDA$($last$\_$audit,company$\_$size,audit$\_$result,business$\_$rule,LET$(...)),$

where business$\_$rule is defined by the above LAMBDA. Make use of the LAMBDA helper function MAP to implement NextAudit$2\_$CSA.

The modular function NextAudit$2\_$CSA has the benefit that it is easy to change the business rule simply by giving another business$\_$rule function as an actual argument.

Appendix

We use a systematic way to document our functions. For each function XYZ that you write, provide the following information $($adapted from the HtDP Function Recipe$)$ in worksheet XYZ$\_$info.

Function name

$(5\%)$ State what kind of data the desired function consumes and produces.

$(10\%)$ Formulate a concise answer to the question what the function computes.

$(20\%)$ Work through examples that illustrate the function's purpose. Important: do this step before you implement your function.

$(30\%)$ Provide the function definition $($using a LAMBDA$).$

$1$ formula for all cells horizontally, vertically

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