Question

(a) A sequence of random numbers can be generated by repeating the statement n- (5*n+3) mod 256 starting from the initial value n-0. Write the-Ruby function rng that each time when it is called returns a new random value from that sequence, generating the following values: 3, 18, 93, 212.39. (b) Write the Ruby function makearray(size) which returns a random array ajk] mg. k-o....size- (c) Traditional sort programs sort an array so that at0] s afl]s al2]s al3] s al4]s. Write the Ruby function zigzagsort(a) which sorts numbers so that at0)2 a[l]s a[2]2 a3]sal4)2, ie. the numbers are going down-up-down-up-down-up, etc. For example if a-[9.8,7.6,5.4,3.2.1] then the zigzagsort function returns [2.1,4,3,6,5,8,7,9]. (d) Show a main Ruby program that creates an array of 21 random numbers, displays that array, then sorts that array using zigzagsort, and displays the resulting zigzag sorted array Hint: Ruby has global variables, and useful library fanctions that yow can sse

Answer 1

Answer:

A)

B)

#1 /usr/bin/ruby 2 $n-0#global variable 3- def rng 4 $n- (5*$n +3) % 256 #calculate return $n 6 end 8 puts rng #calling method rng 9 puts rng 10 puts rng I.lı Result $ruby main.rb 18 93

C)

$n-0 #global variable 3 def rng 4 sn- (5*$n +3) % 256 #calculate return $n 6 end 7 def makearray(size) a-Array.nen(size) #create array of size 'size for i in o..size-1 #looping a[i]- rng end return a 13 end 15 var-makearray 10 16 puts var I.ll Result $ruby main.rb 3 18 93 212 39 198 225 104 58

D)

def zigzag(a) n- a.length for iin 0..n-2 for j if a[j]〉a[j+1] temp-a[j] in 0..n-i-2 a [j +1 ]=temp end end end while i<n-1 do temp-a[i] a[i+1]-temp i-i+2 end return a end

#1 /usr/bin/ruby $n-0 #global variable 3 def rng $n = (5*$n +3) % #calculate 256 4 return $n 6 end 7 def makearray(size) a-Array.nen( size) #create array of size 'size' for i in 0..size-1 #looping a[i]- rng end return a 13 end 14 def zigzag(a) n- a.length for i in O..n-2 for j in 0..n-i-2 18 temp-a[j] 20 a [j +1 ]=temp end 23 24 end 25 i-0 26 27 while i<n-1 do temp-a[i] aril-a[i+11 28

14 def zigzag(a) n- a.length for iin 0..n-2 16 for j in 0..n-i-2 18 temp-a[j] 20 alj+1]-temp end end 23 24 end 25 1-0 while i<n-1 do temp-a[i] aril-ali+11 26 27 28 29 a[i+1]-temp i-i+2 end 30 32 return a 33 end 34 35 var- makearray 21 36 puts var 37 a zigzag var 38 puts a

$ruby main.rb 3 18 93 212 39 198 225 104 58 37 188 175 110 41 208 19 98 237 164

4 408588527 9897513808618709213 131133549519111121222
this is not a copy paste answer may i know what factor is incorrect in your point of view after your rely i will repost the answer