Janmilosh solution

Gemfile

@@ -1,4 +1,5 @@
 source 'https://rubygems.org'
 
 gem 'rubocop', require: false
-gem 'rspec'
+gem 'rspec'
+gem 'pry'

Gemfile.lock

@@ -4,10 +4,16 @@ GEM
     ast (2.0.0)
     astrolabe (1.3.1)
       parser (~> 2.2)
+    coderay (1.1.1)
     diff-lcs (1.2.5)
+    method_source (0.8.2)
     parser (2.2.2.6)
       ast (>= 1.1, < 3.0)
     powerpack (0.1.1)
+    pry (0.10.3)
+      coderay (~> 1.1.0)
+      method_source (~> 0.8.1)
+      slop (~> 3.4)
     rainbow (2.0.0)
     rspec (3.3.0)
       rspec-core (~> 3.3.0)
@@ -29,10 +35,15 @@ GEM
       rainbow (>= 1.99.1, < 3.0)
       ruby-progressbar (~> 1.4)
     ruby-progressbar (1.7.5)
+    slop (3.6.0)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
+  pry
   rspec
   rubocop
+
+BUNDLED WITH
+   1.11.2

gem_city.rb

@@ -0,0 +1,62 @@
+# This class represents the town of GemCity
+# This is a town riddled with crime but we can find out how happy the town is
+class GemCity
+  attr_reader :population
+
+  def initialize
+    @people = { thieves: 5, Officers: 1 }
+    @population = 50
+  end
+
+  def thieves
+    @people[:thieves]
+  end
+
+  def thieves=(thieves_number)
+    @people[:thieves] = thieves_number
+  end
+
+  def officers
+    @people[:Officers]
+  end
+
+  def officers=(officers_number)
+    @people[:Officers] = officers_number
+  end
+
+  def civilians
+    @population - officers - thieves
+  end
+
+  def happiness_of_town
+    # happiness is random... people don't know what they want!
+    happiness_vals = []
+    happiness = 0
+    (1..@population).each do
+      happiness_vals.push(rand((100 - successful_crime_rate)..100))
+    end
+    happiness_vals.each do |value|
+      happiness += value
+    end
+    happiness / 100
+  end
+
+  def successful_crime_rate
+    thieves = @people[:thieves]
+    officers = @people[:Officers]
+    return 0 if thieves <= 0 || officers > thieves
+    odds = 1 - officers.to_f / thieves.to_f
+    odds * 100
+  end
+
+  def city_demographics
+    { thieves: percentage(@people[:thieves]),
+      officers: percentage(@people[:Officers]),
+      civilians: percentage(civilians)
+    }
+  end
+
+  def percentage(number_in_group)
+    "#{(100.0 * number_in_group / @population).round}%"
+  end
+end

gem_city_spec.rb

@@ -1,5 +1,6 @@
 require 'rspec'
-require_relative 'GemCity' # This line may need to be changed
+require 'pry'
+require_relative 'gem_city' # This line may need to be changed
 
 describe 'Gem City' do
   let(:city) { GemCity.new }
@@ -15,19 +16,19 @@
     end
 
     it 'officers = thieves' do
-      city.thieves 1
-      city.setOfficers 1 # This line may need to be changed
+      city.thieves = 1
+      city.officers = 1 # This line may need to be changed
       expect(city.successful_crime_rate).to eq(0)
     end
 
     it 'thieves = 0' do
-      city.thieves 0
+      city.thieves = 0
       expect(city.successful_crime_rate).to eq(0)
     end
 
     it 'officers > thieves' do
-      city.thieves 1
-      city.setOfficers 2 # This line may need to be changed
+      city.thieves = 1
+      city.officers = 2 # This line may need to be changed
       expect(city.successful_crime_rate).to eq(0)
     end
   end
@@ -38,26 +39,26 @@
     end
 
     it 'successful_crime_rate = 0' do
-      city.thieves 0
+      city.thieves = 0
       expect(city.happiness_of_town).to eq(50)
     end
   end
 
-  # context 'city_demographics' do
-  #   it 'initialize' do
-  #     demographics = city.city_demographics
-  #     expect(demographics[:thieves]).to eq('10%')
-  #     expect(demographics[:officers]).to eq('2%')
-  #     expect(demographics[:civilians]).to eq('88%')
-  #   end
-
-  #   it 'thieves = 10, officers = 25' do
-  #     city.thieves = 10
-  #     city.officers = 25
-  #     demographics = city.city_demographics
-  #     expect(demographics[:thieves]).to eq('20%')
-  #     expect(demographics[:officers]).to eq('50%')
-  #     expect(demographics[:civilians]).to eq('30%')
-  #   end
-  # end
+  context 'city_demographics' do
+    it 'initialize' do
+      demographics = city.city_demographics
+      expect(demographics[:thieves]).to eq('10%')
+      expect(demographics[:officers]).to eq('2%')
+      expect(demographics[:civilians]).to eq('88%')
+    end
+
+    it 'thieves = 10, officers = 25' do
+      city.thieves = 10
+      city.officers = 25
+      demographics = city.city_demographics
+      expect(demographics[:thieves]).to eq('20%')
+      expect(demographics[:officers]).to eq('50%')
+      expect(demographics[:civilians]).to eq('30%')
+    end
+  end
 end