Flow Control

Author: raluka

Fancy_Methods/angry_boss.rb Fancy_Methods/ex_angry_boss.rb

@@ -0,0 +1,44 @@
+# using if
+
+puts 'Hello, what\'s your name?'
+name = gets.chomp
+puts 'Hello, ' + name.capitalize + '.'
+
+if name.capitalize == 'Claudiu'
+  puts 'What a lovely name!'
+end
+
+
+# using if / else
+
+puts 'I\'m a fortune teller. Tell me your name.'
+name = gets.chomp.capitalize
+
+if name == 'Claudiu'
+  puts 'I see great things in your future.'
+else
+  puts 'Your future is ... Oh, my! Look at the time!'
+  puts 'I really have to go, sorry!'
+end
+
+
+# branches of branches
+
+puts 'Hello, and welcome to seventh grade English.'
+puts 'My name is Mr. Gabbard. And your name is...?'
+name = gets.chomp
+
+if name == name.capitalize
+  puts 'Please take a seat, ' + name + '.'
+else
+  puts name + '? You mean ' + name.capitalize + ', right?'
+  puts 'Don\'t you even know how to spell your name?'
+  reply = gets.chomp
+
+  if reply.downcase == 'yes' || reply == name.capitalize
+    puts 'Hmmph! Well, sit down!'
+  else
+    puts 'GET OUT!!!'
+  end
+end
+

Fancy_Methods/table_of_contents.rb Fancy_Methods/ex_table_of_contents.rb

@@ -0,0 +1,26 @@
+# less and greater < & >
+
+puts 1 > 2
+puts 1 < 2
+
+# less than or equal <=; greater than or equal >=
+
+puts 5 >= 5
+puts 5 <= 4
+
+# equal == & not equal !=
+
+puts 1 == 1
+puts 2 != 1
+
+# comparing strings = comparing their lexicographical ordering
+
+puts 'cat' < 'dog'
+puts ''
+
+puts 'bug lady' < 'Xander'
+puts 'bug lady'.downcase < 'Xander'.downcase
+puts ''
+
+puts 2 < 10
+puts '2' < '10'

Flow Control/branching.rb

@@ -0,0 +1,29 @@
+# Write a program that will print out the lyrics of "99 Bottles of Beer on the Wall".
+
+initial_number = 99
+current_number = initial_number
+
+
+while current_number > 0
+
+  puts current_number.to_s + ' bottles of beer on the wall, ' + current_number.to_s + ' bottles of beer.'
+  current_number = current_number - 1
+
+  if current_number > 1
+    puts 'Take one down and pass it around, ' + current_number.to_s + ' bottles of beer on the wall.'
+  else
+    puts 'Take one down and pass it around, ' + current_number.to_s + ' bottle of beer on the wall.'
+  end
+
+  puts '---------------------------------------'
+
+  if current_number == 1
+    puts current_number.to_s + ' bottle of beer on the wall, ' + current_number.to_s + ' bottle of beer.'
+    current_number = current_number - 1
+    puts 'Take it down and pass it around, no more bottles of beer on the wall.'
+    puts '---------------------------------------'
+    puts 'No more bottles of beer on the wall, no more bottles of beer.'
+    puts 'Go to the store and buy some more, ' + initial_number.to_s + ' bottles of beer on the wall.'
+  end
+
+end

Flow Control/comparison.rb

@@ -0,0 +1,56 @@
+=begin
+
+ Deaf grandma. Whatever you say to Grandma (whatever you type in), she should respond with this:
+  HUH? SPEAK UP, SONNY!
+unless you shout it (type in all capitals). If you shout, she can hear you (or at least she think so) and yells back:
+  NO, NOT SINCE 1938!
+To make program believable, have Grandma shout different year each time, maybe any year at random between 1930 and 1950.
+You can't stop talking with Grandma until you shout BYE.
+
+=end
+
+puts 'WHAT\'S UP, SONNY?'
+while true
+  response = gets.chomp
+  if response == 'BYE'
+    puts 'GOOD BYE, MY SON!'
+    break
+  elsif response == response.upcase
+    random_year = rand(20) + 1930
+    puts "NO, NOT SINCE #{random_year}!"
+  else
+    puts 'HUH? SPEAK UP, SONNY!'
+  end
+end
+
+=begin
+
+Deaf grandma extended. What if Grandma doesn't want you to leave? When you shout 'BYE' she could pretend not to hear you.
+Change your previous program so that you have to shout 'BYE' three times in a row. If you shout BYE three times, but not
+in a row, you should still be talking with Grandma.
+
+=end
+
+puts 'WHAT\'S UP, SONNY?'
+count = 0
+while true
+  response = gets.chomp
+  if response == 'BYE'
+    count = count + 1
+    puts 'HUH?'
+  else
+    count = 0
+    if response == response.upcase
+      random_year = rand(20) + 1930
+      puts "NO, NOT SINCE #{random_year}!"
+    else
+      puts 'HUH? SPEAK UP, SONNY!'
+    end
+  end
+  if count >=3
+    puts 'GOOD BYE, MY SON!'
+    break
+  end
+end
+
+

Flow Control/ex_99_bottles_of_beer.rb

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+# logical operators ||, &&, and !
+
+i_am_chris = true
+i_am_purple = false
+i_like_beer = true
+i_eat_rocks = false
+
+puts i_am_chris && i_like_beer
+puts i_like_beer && i_eat_rocks
+puts i_am_purple && i_eat_rocks
+puts
+puts i_am_chris || i_like_beer
+puts i_like_beer || i_eat_rocks
+puts i_am_purple || i_like_beer
+puts i_am_purple || i_eat_rocks
+puts
+puts !i_am_purple
+puts !i_am_chris

Flow Control/ex_grandma.rb

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+# while in loop
+
+input = ''
+while input != 'bye'
+  puts input
+  input = gets.chomp
+end
+puts 'Come again soon!'
+
+
+# looping forever until break
+
+while 'Spike' > 'Angel'
+  input = gets.chomp
+  puts input
+  if input == 'bye'
+    break
+  end
+end
+puts 'Come again soon!'
+
+while true
+  input = gets.chomp
+  puts input
+  if input == 'bye'
+    break
+  end
+end
+puts 'Come again soon!'

Flow Control/logic.rb

@@ -1,4 +1,3 @@
-
 # Full name greeting. Write a program that asks for a person's first name, then middle, and then last.
 #Finally, it should greet the person using their full name.
 puts 'Hello there, and what\'s your name?'