Ashton's Calculator

calculator.rb

@@ -0,0 +1,97 @@
+
+# The program should ask the user for an operation (string or numeric symbol) and two numbers.
+
+
+puts "Hey! Let's do some math!"
+print "Enter the first number: "
+first_number = gets.chomp
+has_first_number = false #attempted to use these variables and the below loop to ensure the inputs are numbers
+#has_second_number = false
+
+
+#checks for erroneous inputs
+#this doesn't work exactly as intended. It will catch if the first input  is not a number but will loop "Oops! Enter the First Number: " x times before moving on to the next block of code. (x = length of string ). The end of the loop does not veryify the the input contains a number
+
+#i attempted using a rang here, and went into a rabbit hole of regular expressions *regex* and only confused myself more.
+#I believe im overlooking a obvious/simple solution
+unless has_first_number == true
+  first_number.length.times do |pos|
+    if first_number[pos] == "0" || first_number[pos].to_i != 0
+      has_first_number = true
+    end
+    if has_first_number == false
+      print "Oops! That is not a valid number. Enter the first number: "
+      first_number = gets.chomp
+    end
+  end
+end
+
+#now that first_number is verified to be a number, this changes the class from string to integer
+first_number = first_number.to_i
+
+# first_number = first_number.to_i
+# else
+#   puts "#{first_number} is not a valid number"
+  # while first_number != /^d{0,9}$/
+  #   puts "#{first_number} is not a valid number. Please enter the first number: "
+  # first_number = gets.chomp
+# end
+
+#accepts equation operator
+print "Would you like to add, subtract, multiply or divide? "
+operator = gets.chomp
+
+#accepts second number #because i could not get the erroneous number test to work properly above, i did not use it down here. If user inputs "clown", "clown" = 0
+print "enter your second number: "
+second_number = gets.chomp.to_i
+
+
+
+# The program should use the input operation and two numbers to provide the result of applying the operation to the two numbers.
+
+#define operators
+
+# creating addtion method
+def plus(num_one, num_two)
+  return num_one + num_two
+end
+
+#substraction method
+def minus(num_one, num_two)
+  return num_one - num_two
+end
+
+#multiplication method
+def multiplied_by (num_one, num_two)
+  return num_one * num_two
+end
+
+#division method
+def divided_by (num_one, num_two)
+  return num_one / num_two
+end
+
+
+# The program should have support for these four operations: addition, subtraction, multiplication, and division.
+# The program should accept both the name (add) and the symbol (+) for each possible operation.
+
+
+case operator
+
+  # accepts either name or symbol for addtion, subtraction, multiplication, and division.
+  #prints equation and solution
+  when "add", "addition", "+"
+    puts "#{first_number} + #{second_number} = #{plus(first_number, second_number)}"
+  when "subtract", "subtraction", "-"
+    puts "#{first_number} - #{second_number} = #{minus(first_number, second_number)}"
+  when "multiply", "multiplication", "*"
+    puts "#{first_number} * #{second_number} = #{multiplied_by(first_number, second_number)}"
+  when "divide", "division", "/"
+    if second_number == 0
+      puts "Silly, can't divide by Zero!"
+    else
+      puts "#{first_number} / #{second_number} = #{divided_by(first_number, second_number)}"
+    end
+  else
+    puts "something is not right"
+end