Dynamic Constant Assignment

Ruby
1

Good evening everyone,
I have posted my code below but am unable to determine what is causing a
persistent “Dynamic constant assignment” error at

“Console_Screen = Screen.new” and “SQ = Quiz.new”

on line 144 and 146. Any help or insight at all would be great. I’ve had
this issue before and it was fixed with “end”. I went through and to me
it seems like all of the end statements are in the appropriate place.

class Screen

def cls
puts (“\n” * 25)
puts “\a”

end

def pause
#Pauses the display until the player presses the enter
key
STDIN.gets

end

class Quiz

def display_greeting
Console_Screen.cls #Clears display
print “\t\t Welcome to the SUperman Movie Trivia Quiz!” +
“\n\n\n\n\n\n\n\n\n\nPress Enter to” +
“continue.”

  Console_Screen.pause  #Pauses the game

end
def display_instructions #Method to present quiz instructions

Console_Screen.cls

puts "INSTRUCTIONS:\n\n" #Displays a heading
puts "You will be presented with a series of" +
  "multiple-choice"
puts "questions. To answer a question, type in" +
  "the letter of"
puts " the corresponding answer and press the" +
  "Enter Key. Your"
puts "grade will be displayed at the end of the" +
  "test\n\n\n"
puts "Good luck!\n\n\n\n\n\n\n"
print "Press Enter to continue."

Console_Screen.pause    #Pause the game

end

def disp_q(question, q_A, q_B, q_C, q_D, answer)

  #loop until a valid answer is input
  loop do

    Console_Screen.cls
    #formats the display of the questions

    puts question + "\n\n"
    puts q_A
    puts q_B
    puts q_C
    puts q_D

    print "\nType the letter representing your answer:"

    reply = STDIN.gets #collect the answer
    reply.chop!

    #Analyze the input
    if answer == reply then
      $noRight += 1
    end


    if reply == "a" or reply == "b" or reply =="c" or
      reply == "d" then

      break
    end
 end



  #Method for grading the quiz
    def determine_grade


      Console_Screen.cls

      #To pass they must answer 3 questions correctly
      if $noRight >= 3 then
        print "You correctly answered " + $noRight.to_s + "
        question(s)."
        puts "You have passed the \nSuperman Movie Trivia" +
          "Quiz!\n\n"
        puts "You have earned a rank of: Good Citizen" if
        $noRight == 3
        puts "You have earned a rank of: Side Kick"
        if $noRight == 4
        puts "You have earned the rank of: SuperHero"
        if $noRight == 5
          print "\n\nPress Enter to continue."

        else #they failed

          print "You missed" + (5 - $noRight).to_s +
            "questions."
          puts "You have failed the Superman Movie Trivia Quiz."
          puts "Perhaps you should watch the movies again before
          returning to"
          puts "retake the quiz"
          print "\n\nPress Enter to continue"

        end



        Console_Screen.pause



        def display_credits

          Console_Screen.cls

          puts"\t\tThank you for taking the SUPERMAN MOVIE TRIVIA
          QUIZ!\n\n\n\n"
          puts "\n\t\t\t Developed by Glenn B Chamberlain\n\n"
          puts "\t\t\t\t Copyright 2017\n\n"
          puts "\t\t\tURL:

http://www.glennisthebestprogrammerever.com\n\n\n\n"

      end

#Main Script
Logic----------------------------------------------------------------

        #Keep track of the number of correct answers
          $noRight = 0

#Where the problem is shown when I try to run the code-------------
Console_Screen = Screen.new

          SQ = Quiz.new

#----------------------------------------------------------------
#Execute the display_greeting method

          SQ.display_greeting

          answer = ""
          #loop until the play enters y or n only

          loop do

            Console_Screen.cls
            print "Are you ready to take the quiz? (y/n): "

            answer = STDIN.gets
            answer.chop!

            break if answer == "y" || answer == "n"



          #analyze the players input
            if answer == "n"

              Console_Screen.cls

              puts "Okay, perhaps another time.\n\n"

            else

              SQ.display_instructions #executes the

display_instructions method

              #execute the disp_q method and pass it arguments

(questions, answers and correct answers)

          SQ.disp_q("What is the name of the Daily Planet's ace" +
            "photographer?", "a. Jimmy Olsen", "b. Clark Kent", +
                "c. Lex Luthor", "d. Lois Lane", "a")

   #Call upon the disp_q method and pass it the second questions

     SQ.disp_q("What is the name of Clark Kents home town?",
                 "a. Metropolis", "b. Gotham City", "c.Smallville",
                  "d. New York", "c")
                SQ.disp_q("In which movie did Superman battle" +
                  "General Zod?", "a. Super", "b. Superman II",
                  "c. Superman III", "d. Superman IV", "b")
                SQ.disp_q("What is the name of Superman's father?",
               "a. Nimo","b. Jarrell", "c. Lex Luthor",

“d.Krypton”,“b”)
SQ.disp_q("Where had Superman been at the start of "

  •     "Superman Returns?", "a. Moon", "b. Fortress of Solitude",
                "c. Earth's Core", "d. Krypton", "d")

    #call up the determine_grade method to display the grade

                SQ.determine_grade

                SQ.display_credits
          end
2

I was able to figure it out. And no my "end"s were not correct lol. I
need to pay better attention to their locations. This is the script that
works:

Define Custom

Class--------------------------------------------------------
class Screen

def cls
puts (“\n” * 25)
puts “\a”

end

def pause
#Pauses the display until the player presses the enter
key
STDIN.gets

end
end

class Quiz

def display_greeting
Console_Screen.cls #Clears display
print “\t\t Welcome to the SUperman Movie Trivia Quiz!” +
“\n\n\n\n\n\n\n\n\n\nPress Enter to” +
“continue.”

  Console_Screen.pause  #Pauses the game

end
def display_instructions #Method to present quiz instructions

Console_Screen.cls

puts "INSTRUCTIONS:\n\n" #Displays a heading
puts "You will be presented with a series of" +
  "multiple-choice"
puts "questions. To answer a question, type in" +
  "the letter of"
puts " the corresponding answer and press the" +
  "Enter Key. Your"
puts "grade will be displayed at the end of the" +
  "test\n\n\n"
puts "Good luck!\n\n\n\n\n\n\n"
print "Press Enter to continue."

Console_Screen.pause    #Pause the game

end

def disp_q(question, q_A, q_B, q_C, q_D, answer)

  #loop until a valid answer is input
  loop do

    Console_Screen.cls
    #formats the display of the questions

    puts question + "\n\n"
    puts q_A
    puts q_B
    puts q_C
    puts q_D

    print "\nType the letter representing your answer:"

    reply = STDIN.gets #collect the answer
    reply.chop!

    #Analyze the input
    if answer == reply then
      $noRight += 1
    end


    if reply == "a" or reply == "b" or reply =="c" or
      reply == "d" then

      break

    end
 end

end

  #Method for grading the quiz
    def determine_grade


      Console_Screen.cls

      #To pass they must answer 3 questions correctly
      if $noRight >= 3 then
        print "You correctly answered " + $noRight.to_s + "
        question(s)."
        puts "You have passed the \nSuperman Movie Trivia" +
          "Quiz!\n\n"
        puts "You have earned a rank of: Good Citizen" if  $noRight

== 3
puts “You have earned a rank of: Side Kick” if $noRight
== 4
puts “You have earned the rank of: SuperHero” if $noRight
== 5
print “\n\nPress Enter to continue.”

        else #they failed

          print "You missed" + (5 - $noRight).to_s +
            "questions."
          puts "You have failed the Superman Movie Trivia Quiz."
          puts "Perhaps you should watch the movies again before
          returning to"
          puts "retake the quiz"
          print "\n\nPress Enter to continue"

        end


        Console_Screen.pause

 end


        def display_credits

          Console_Screen.cls

          puts"\t\tThank you for taking the SUPERMAN MOVIE TRIVIA
          QUIZ!\n\n\n\n"
          puts "\n\t\t\t Developed by Glenn B Chamberlain\n\n"
          puts "\t\t\t\t Copyright 2017\n\n"
          puts "\t\t\tURL:

http://www.glennisthebestprogrammerever.com\n\n\n\n"

      end

#Main Script
Logic----------------------------------------------------------------

        #Keep track of the number of correct answers
          $noRight = 0

         Console_Screen = Screen.new

         SQ = Quiz.new

          #Execute the display_greeting method

          SQ.display_greeting

          answer = ""
          #loop until the play enters y or n only

          loop do

            Console_Screen.cls
            print "Are you ready to take the quiz? (y/n): "

            answer = STDIN.gets
            answer.chop!

            break if answer == "y" || answer == "n"
          end



          #analyze the players input
            if answer == "n"

              Console_Screen.cls

              puts "Okay, perhaps another time.\n\n"

            else

              SQ.display_instructions #executes the

display_instructions method

              #execute the disp_q method and pass it arguments

(questions, answers and correct answers)

              SQ.disp_q("What is the name of the Daily Planet's ace" 

  •               "photographer?", "a. Jimmy Olsen", "b. Clark Kent", 

  •               "c. Lex Luthor", "d. Lois Lane", "a")

              #Call upon the disp_q method and pass it the second

questions

                SQ.disp_q("What is the name of Clark Kents home

town?",
“a. Metropolis”, “b. Gotham City”, “c.Smallville”,
“d. New York”, “c”)
SQ.disp_q(“In which movie did Superman battle” +
“General Zod?”, “a. Super”, “b. Superman II”,
“c. Superman III”, “d. Superman IV”, “b”)
SQ.disp_q(“What is the name of Superman’s father?”,
“a. Nimo”,“b. Jarrell”, “c. Lex Luthor”, “d.
Krypton”,“b”)
SQ.disp_q("Where had Superman been at the start of "
+
“Superman Returns?”, “a. Moon”, “b. Fortress of
Solitude”,
“c. Earth’s Core”, “d. Krypton”, “d”)

                  #call up the determine_grade method to display the

grade

                  SQ.determine_grade

                  SQ.display_credits
            end

end

3

Props for the effort - that actually was a lot of code.

I you are tired of the various puts, you can always do:

alias e puts

Or something like that. I like it because it is so
short. Ruby has Kernel#p too I think but it is a bit
different, when you do “p object”, I think it calls
the #inspect method. But for debugging it can be
nice, and pp is even better (though it requires a
require ‘pp’ line before you can use pp, unortunately)

4

Thanks Robert.

Another thing I need to do with this code is make it to where the player
is given an option to press a key for a more detailed set of
instructions from within the “instructions” screen. My question is how
to make the script pull the new method when the user presses the key.

def display_instructions #Method to present quiz instructions

Console_Screen.cls

puts "INSTRUCTIONS:\n\n" #Displays a heading
puts "You will be presented with a series of" +
  "multiple-choice"
puts "questions. To answer a question, type in" +
  "the letter of"
puts " the corresponding answer and press the" +
  "Enter Key. Your"
puts "grade will be displayed at the end of the" +
  "test\n\n\n"
puts "Good luck!\n\n\n\n\n\n\n"
print "Press Enter to continue or press (I) for grading

instructions"

end

def disp_scale
puts “this is a test”
Console_Screen.pause

end

5

Here’s my final script! I got it all to work. Let me know what you
think! I know some of the words are pushed together and there may be
some spelling but I was aiming for function.

#---------------------------------------------------------------------------------

Script Name: SupermanQuiz.rb

Version: 1.0

Author: Glenn B. Chamberlain

Date: March 6, 2017

#-----------------------------------------------------------------------------------

Define Custom

Class--------------------------------------------------------
class Screen

def cls
puts (“\n” * 25)
puts “\a”

end

def pause
#Pauses the display until the player presses the enter
key
STDIN.gets

end
def instructionpause
gets

end
end

class Quiz

def display_greeting
Console_Screen.cls #Clears display
print “\t\t Welcome to the SUperman Movie Trivia Quiz!” +
“\n\n\n\n\n\n\n\n\n\nPress Enter to” +
“continue.”

  Console_Screen.pause  #Pauses the game

end
def display_instructions #Method to present quiz instructions

Console_Screen.cls

puts "INSTRUCTIONS:\n\n" #Displays a heading
puts "You will be presented with a series of" +
  "multiple-choice"
puts "questions. To answer a question, type in" +
  "the letter of"
puts " the corresponding answer and press the" +
  "Enter Key. Your"
puts "grade will be displayed at the end of the" +
  "test\n\n\n"
puts "Good luck!\n\n\n\n\n\n\n"
print "Press Enter to continue or press (i) for grading

instructions"

Console_Screen.instructionpause
answer = gets
answer.chop!

if answer == "i"

  puts disp_scale
else

end

end

#Created for step 5
def disp_scale
Console_Screen.cls

puts “You will be graded based on the number of questions you answer
correctly\n” +
“You will be a SUPER HERO for 8 or more.\n” +
“A SIDE KICK for 7.\n” +
“And a GOOD CITIZEN for 6.\n\n\n” +
“You will fail if you answer fewer than 6.\n\n\n” +
“Press Enter to proceed to the quiz\n\n\n\n”
Console_Screen.pause

end
def disp_q(question, q_A, q_B, q_C, q_D, answer)

  #loop until a valid answer is input
  loop do

    Console_Screen.cls
    #formats the display of the questions

    puts question + "\n\n"
    puts q_A
    puts q_B
    puts q_C
    puts q_D

    print "\nType the letter representing your answer:"

    reply = STDIN.gets #collect the answer
    reply.chop!

    #Analyze the input
    if answer == reply then
      $noRight += 1
    end


    if reply == "a" or reply == "b" or reply =="c" or
      reply == "d" then

      break

    end
 end

end

  #Method for grading the quiz
    def determine_grade


      Console_Screen.cls

      #To pass they must answer 6 questions correctly per section 1
      if $noRight >= 6 then
        print "You correctly answered " + $noRight.to_s + "
        question(s)."
        puts "You have passed the \nSuperman Movie Trivia" +
          "Quiz!\n\n"
        puts "You have earned a rank of: Good Citizen" if  $noRight

== 6
puts “You have earned a rank of: Side Kick” if $noRight
== 7
puts “You have earned the rank of: Super Hero” if $noRight

= 8
print “\n\nPress Enter to continue.”

        else #they failed

          print "You missed" + (5 - $noRight).to_s +
            "questions."
          puts "You have failed the Superman Movie Trivia Quiz."
          puts "Perhaps you should watch the movies again before
          returning to retake the quiz"
          #Section 4
          puts " Here is a link to brush up on some facts"
          puts " http://en.wikipedia.org/wiki/Superman_movies"
          print "\n\nPress Enter to continue"

        end


        Console_Screen.pause

 end


        def display_credits

          Console_Screen.cls

          puts"\t\tThank you for taking the SUPERMAN MOVIE TRIVIA

QUIZ!\n\n\n\n"
puts “\n\t\t\t Developed by Glenn B Chamberlain\n\n”
puts “\t\t\t\t Copyright 2017\n\n”
puts “\t\t\tURL:
http://www.glennisthebestprogrammerever.com\n\n\n\n”

      Console_Screen.pause

      end

#Main Script
Logic----------------------------------------------------------------

        #Keep track of the number of correct answers
          $noRight = 0

         Console_Screen = Screen.new

         SQ = Quiz.new

          #Execute the display_greeting method

          SQ.display_greeting

          answer = ""
          #loop until the play enters y or n only

          loop do

            Console_Screen.cls
            print "Are you ready to take the quiz? (y/n): "

            answer = STDIN.gets
            answer.chop!

            break if answer == "y" || answer == "n"
          end



          #analyze the players input
            if answer == "n"

              Console_Screen.cls
             #Added for step 3 to present the credits if the player

decides not to play
SQ.display_credits

              Console_Screen.pause

            else


              SQ.display_instructions  #executes the

display_instructions method

              #execute the disp_q method and pass it arguments

(questions, answers and correct answers)

              SQ.disp_q("What is the name of the Daily Planet's ace" 

  •               "photographer?", "a. Jimmy Olsen", "b. Clark Kent", 

  •               "c. Lex Luthor", "d. Lois Lane", "a")

              SQ.disp_q("What is the name of Clark Kents home

town?",
“a. Metropolis”, “b. Gotham City”, “c.Smallville”,
“d. New York”, “c”)
SQ.disp_q(“In which movie did Superman battle” +
“General Zod?”, “a. Super”, “b. Superman II”,
“c. Superman III”, “d. Superman IV”, “b”)
SQ.disp_q(“What is the name of Superman’s father?”,
“a. Nimo”,“b. Jarrell”, “c. Lex Luthor”, “d.
Krypton”,“b”)
SQ.disp_q("Where had Superman been at the start of "
+
“Superman Returns?”, “a. Moon”, “b. Fortress of
Solitude”,
“c. Earth’s Core”, “d. Krypton”, “d”)
SQ.disp_q(“What is the name of the Daily Planet’s ace”
+
“photographer?”, “a. Jimmy Olsen”,
“b. Clark Kent”, +
“c. Lex Luthor”, “d. Lois Lane”,
“a”)

                    #Addition questions for section 1

                           SQ.disp_q("What can Superman travel

faster than?“,
“a. Speeding Bullet”, “b. Crawling
Baby”, “c. Springing Springs”,
“d. Jumping Frogs”, “a”)
SQ.disp_q(“What can Superman shoot
from his eyes?”,
“a. Skittles”, “b. Rainbows”,
“c. Lasers”, “d. Other Superman”,
“c”)
SQ.disp_q(” What is Supermans home
planet?",
“a. Saturn”,“b. Mars”, “c.
Avatar”, “d. Krypton”,“d”)
SQ.disp_q(“Who is Superman in love
with?”, “a. Mary Jane”, “b. Himself”,
“c. Barbara”, “d. Louis”, “d”)
SQ.disp_q(“Who created the Superman
story?”, “a. Jerry Siegel”, “b. Himself”,
“c. Joe
Shuster”, “d. Both A and C”, “d”)

                  #call up the determine_grade method to display the

grade

                  SQ.determine_grade

       #Causes the player to be prompted to do the quiz again until

they can get over 6 correct answers for
#part 2
until $noRight >= 6
print “Would you like to try again?(y/n)”

     answer = STDIN.gets
     answer.chop!
     if answer == "y"
       SQ.display_instructions  #executes the display_instructions

method

                         #execute the disp_q method and pass it

arguments (questions, answers and correct answers)

                         SQ.disp_q("What is the name of the Daily

Planet’s ace" +
“photographer?”, “a. Jimmy Olsen”, “b.
Clark Kent”, +
“c. Lex Luthor”, “d. Lois Lane”, “a”)

                           SQ.disp_q("What is the name of Clark

Kents home town?",
“a. Metropolis”, “b. Gotham City”,
“c.Smallville”,
“d. New York”, “c”)
SQ.disp_q(“In which movie did Superman
battle” +
“General Zod?”, “a. Super”, “b.
Superman II”,
“c. Superman III”, “d. Superman IV”,
“b”)
SQ.disp_q(“What is the name of Superman’s
father?”,
“a. Nimo”,“b. Jarrell”, “c. Lex
Luthor”, “d. Krypton”,“b”)
SQ.disp_q("Where had Superman been at the
start of " +
“Superman Returns?”, “a. Moon”, “b.
Fortress of Solitude”,
“c. Earth’s Core”, “d. Krypton”, “d”)
SQ.disp_q(“What is the name of the Daily
Planet’s ace” +
“photographer?”, “a.
Jimmy Olsen”, “b. Clark Kent”, +
“c. Lex Luthor”, “d. Lois
Lane”, “a”)

                               #Addition questions for section 1

                                      SQ.disp_q("What can Superman

travel faster than?“,
“a. Speeding Bullet”,
“b. Crawling Baby”, “c. Springing Springs”,
“d. Jumping Frogs”,
“a”)
SQ.disp_q(“What can
Superman shoot from his eyes?”,
“a. Skittles”, “b.
Rainbows”,
“c. Lasers”, “d. Other
Superman”, “c”)
SQ.disp_q(” What is
Supermans home planet?",
“a. Saturn”,“b.
Mars”, “c. Avatar”, “d. Krypton”,“d”)
SQ.disp_q(“Who is
Superman in love with?”, “a. Mary Jane”, “b. Himself”,
“c. Barbara”, “d.
Louis”, “d”)
SQ.disp_q(“Who created
the Superman story?”, “a. Jerry Siegel”, “b. Himself”,
“c.
Joe Shuster”, “d. Both A and C”, “d”)

                             #call up the determine_grade method to

display the grade

                             SQ.determine_grade


     else



       SQ.display_credits
       Console_Screen.pause

     end
   end
end

end