Ampers: Abinnet Ainalem

calculator.rb

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+
+def border
+  puts "-------------------------------"
+end
+border
+border
+
+# Welcomes User
+puts "Welcome! I will help you calculate simple math\n"
+
+# Gives user directions for input
+puts "\n INPUT DIRECTIONS: "
+puts "** Separate all values and symbols."
+puts "** Enter two numbers at a time"
+puts "** Use format: number operator number"
+puts "** Enter operators as symbols or names"
+puts " Use:\n"
+puts "+   add"
+puts "-   subtract"
+puts "*   multiply"
+puts "/   divide\n"
+
+# Arrays storing past equations, issues with user input, and current equation being calculated
+solved_equations = []
+points_of_confusion = []
+equation = []
+
+# Variables used to store total for solved equation and initiate while loop
+total = 0
+response = "y"
+
+# Evaluates user response for float, integer, word
+def float_or_integer value
+  if value.to_f.to_s == value
+    value = value.to_f
+  elsif value.to_i.to_s == value
+    value = value.to_i
+  else
+    value = false
+  end
+  return value
+end
+
+while response == "y"
+  puts "\nPlease enter your equation."
+  user_entry = gets.chomp.downcase.split(" ")
+
+  numbers = [user_entry[0], user_entry[2]]
+  numbers.each do |num|
+    if float_or_integer(num) == false && num != nil
+      points_of_confusion.push("I am unsure of the meaning of #{num}.")
+    elsif num == nil
+      points_of_confusion.push("Missing a number")
+    else
+      equation.push(float_or_integer(num))
+    end
+  end
+
+  operator = user_entry[1]
+  case operator
+  when "add", "+"
+    total = equation[0] + equation [1]
+  when "subtract", "-"
+    total = equation[0] - equation [1]
+  when "multiply", "*"
+    total = equation[0] * equation [1]
+  when "divide", "/"
+    if equation[1].to_i != 0
+      total = equation[0] / equation [1]
+    else
+      points_of_confusion.push("You cannot divide by 0.")
+    end
+  else
+    points_of_confusion.push("I am unsure of the meaning of #{operator}.")
+  end
+
+  if points_of_confusion.length > 0
+    puts "I was unable to solve your equation because:"
+    points_of_confusion.each {|issue| puts issue}
+    puts "\n"
+  else
+    solved_equation = "#{user_entry.join(" ")} = #{total}"
+    puts solved_equation
+    solved_equations.push(solved_equation)
+  end
+  equation.clear
+  points_of_confusion.clear
+  puts "\n"
+  border
+  puts "Type y to compute more equations. Type anything else to stop adding equations.\n"
+  response = gets.chomp.downcase
+end
+
+puts "Equations solved:"
+solved_equations.each {|equation| puts equation}
+puts "\n"