Crossover Team

2D Arrays FRQ (2018)

2018
Part A asked to find values in a certain column
Created a variable that stored all the values, iterated through each row in order to get all of the values and print them out
Part B asked to test whetehr or not it is allowed in sq
ContainsDuplicates, iterated through the arrays to test whether or not the valeus are in each separate array
Square should have all of the values in each row, but they cannot repeat in the same row or in the same column
Checked to see whether the square contained duplicates
Failure points, checked for errors in his code
Error shows that there are duplicates in the same row, which is the fourth row
Checks to see if there are duplicates in the same column

2019
Class for a lightboard
2D Array with some unspecified number of rows called lights
constructor lightboard, extantiate a new 2d array with the proper number of rows
evaluateLight returns true or false
Part A required use of a nested for loop and to iterate through num rows and num columns
Generate a random number using the random integer from 1-10 to see if it is greater than or equal to 6, four values return true while 6 return false
Testing method: created two countervariables on and off, both set to 0, used nested for loop, checked to see if each element was on or off
Part B requires counting through every column
Every column has the same index within a specified row
After calculating the number of rows in each column you can see if the value would be true or false
Tested the actual light board with true and false

Created a step tracker class to see if the number of steps per day would be counted
Needed to implement three methods
Steptracker has minimum stemps, totalsteps, activedays, and totaldays
constructor that sets the initial values for initial methods equal to 0
averageSteps goes on to add daily steps and divides by the total number of days
if steps was less than 10000 a day would not be added
if steps was greater than 10000 then a day would be added and would return a double value for the averagesteps

Creating functions related to a calendar
Part A returns the number of leap years between two years, the first one being the early year and the second one being the later year
increase number of leap years using an isLeapYear function, returns boolean value of true if it is a leap year, otherwise returns false
Part B will return the day of the week of a given date
a lot of fill in the blank
day of the week of the first day of the year, subtracting 1 to account for the fact that the first day of the year starts on the first day
represents days of the week as integer values from 0 to 6
isLeapYear function is a boolean conditional will determine if it is a leap year, has to be divisible by 400 and not by 100 or divisible by 100 (rule for centuries)
tests out the function with the year 2000

Guessing game (classes)
After a guess is made, a hint is given based on the comparison between the user’s guess and the real answer
Make sure to have a class, constructor, and method headers
Want us to see us access the list and the for loop
Tips: make sure to get constructor, class, and variables in