Space - Yieni

calculator.rb

@@ -0,0 +1,82 @@
+def addition (number1, number2)
+    return (number1 + number2)
+end
+
+def subtract (number1, number2)
+    return (number1 - number2)
+end
+
+def multiply (number1, number2)
+    return (number1 * number2)
+end
+
+def divide (number1, number2)
+    return (number1 / number2)
+end
+
+def quit
+    puts "That is not a valid entry! Please try again"
+    exit
+end
+
+puts "Welcome to the Calculator program! Which program would you like to use?"
+puts "\n 1. add(+) \n 2. subtract(-) \n 3. multiply(*) \n 4. divide(/) \n"
+puts "Please choose one operator (name or symbol):"
+operator = gets.chomp.downcase
+
+case operator
+when "add", "+"
+  puts "What numbers would you like to add"
+  number1 = Integer(gets.chomp) rescue nil
+  number2 = Integer(gets.chomp) rescue nil
+
+  if number1.is_a?(Integer) && number2.is_a?(Integer)
+     puts "#{number1} + #{number2} = #{addition(number1,number2)}"
+  else 
+     quit
+  end
+
+when "subtract", "-"
+  puts "What numbers would you like to subtract?"
+  number1 = Integer(gets.chomp) rescue nil
+  number2 = Integer(gets.chomp) rescue nil
+
+  if number1.is_a?(Integer) && number2.is_a?(Integer)
+     puts "#{number1} - #{number2} = #{subtract(number1,number2)}"
+  else 
+     quit
+  end
+
+when "multiply", "*"
+    puts "What numbers would you like to multiply?"
+    number1 = Integer(gets.chomp) rescue nil
+    number2 = Integer(gets.chomp) rescue nil
+
+    if number1.is_a?(Integer) && number2.is_a?(Integer)
+       puts "#{number1} * #{number2} =  #{multiply(number1,number2)}"
+    else 
+       quit
+    end
+
+when "divide", "/"
+    puts "What numbers would you like to divide?"
+    number1 = Integer(gets.chomp) rescue nil
+    number2 = Integer(gets.chomp) rescue nil
+
+    if number1.is_a?(Integer) && number2.is_a?(Integer)
+        if number2 != 0
+            if number1 % number2 > 0
+              puts "#{number1} / #{number2} =  #{divide(number1.to_f,number2.to_f)}"
+            else
+              puts "#{number1} / #{number2} =  #{divide(number1,number2)}"
+            end
+        else
+          puts "Divide by zeo error!"
+        end
+    else 
+       quit
+    end
+
+else 
+    puts "That is not a valid option!"
+end