I am new to racket (first year student) and since class has been pushed to
online only, I am having a harder time.
We are currently working on vectors and hash tables. I feel like I keep
overthinking it and keep getting stuck. I know that the first parameter in
the function will be the year and the second will be the (vector-ref months
x)that I pull from the defined vector.
The question I am having a hard time with and what I have actually done
below.
Create a function that calculates the number of days in a month given a
year and a month
- Call the function number-of-days-in-month, and it's signature is
number, number -> number
- Example:
(number-days-in-month 2016 1) -> 31
(number-days-in-month 2016 11) -> 30
(number-days-in-month 2016 12) -> 31
(number-days-in-month 1900 2) -> 28
(number-days-in-month 2000 2) -> 29
(number-days-in-month 2016 2) -> 29
(number-days-in-month 2200 2) -> 28
*What I have so far...*
;Leap Year
(define (leap-year? year)
(and (zero? (modulo year 4))
(or (not (zero? (modulo year 100)))
(zero? (modulo year 400))
)
)
)
;Months with days vector, beginning at an index of 0 since there is not 0th
month
(define months (vector 0 31 28 31 30 31 30 31 31 30 31 30 31))
(check-expect(number-days-in-month 2016 1)31)
(check-expect(number-days-in-month 2016 11)30)
(check-expect(number-days-in-month 2016 12)31)
(check-expect(number-days-in-month 1900 2)28)
(check-expect(number-days-in-month 2000 2)29)
(check-expect(number-days-in-month 2016 2)29)
(check-expect(number-days-in-month 2200 2)28)
*I need help with building the actual function and what conditionals I
should be using.*
(define (number-days-in month ?? ??)
(cond
[
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