Cohort-Assignment 2

Write a read-only function that returns true if the given year is a leap year else return false

Prototype:

// returns bool (define-read-only (is-leap (year uint))

// your logic here

)

Test Cases:

Input: u1972 Output: True Input: u2022 Output: False

Note: You can make helper functions but they must act read-only as well.

Reference:

https://www.programiz.com/cpp-programming/examples/leap-year https://docs.stacks.co/write-smart-contracts/language-functions#if

Write a read-only function that returns the number of leap years between two years.

Prototype:

// returns uint (define-read-only (no-leap (year1 uint) (year2 uint))

// your logic here

)

Test Cases:

Input: u1972, u2020 Output: u13 Input: u2000, u2016 Output: u5 Note: Your function must return the number of leap years inclusive of the two years passed as arguments

Reference:

https://stackoverflow.com/questions/4587513/how-to-calculate-number-of-leap-years-between-two-years-in-c-sharp

https://miniwebtool.com/leap-years-list

Write a read-only function that returns the hour, minute and second represented by the given Unix epoch timestamp in GMT.

Prototype:

// returns tuple (define-read-only (get-date (timestamp uint))

// your logic here

)

Test Cases:

Input: u12345 Output: {hour: u3, min: u25, sec: u45}

Note: You don’t need to calculate the year, month, day.

Reference:

https://www.jotform.com/help/443-mastering-date-and-time-calculation https://docs.stacks.co/write-smart-contracts/language-functions#mod https://www.epochconverter.com

Write a read-only function that returns the missing number from a list of first 10 natural numbers starting from 1.

Prototype:

// returns uint (define-read-only (get-missing (numbers (list 10 uint)))

// your logic here

)

Test Cases:

Input: (list u1 u2 u3 u4 u6 u7 u8 u9 u10) Output: u5 Input: (list u1 u3 u4 u5 u6 u7 u8 u9 u10) Output: u2 Note: There will only be one number missing and all other numbers will be present.

Reference:

https://docs.stacks.co/write-smart-contracts/language-functions#fold Usage: (contract-call? . get-missing (list u1 …… u10))