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@amy-mac

amy-mac/Calculator.rb Secret

Last active Dec 24, 2015
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What would you like to do?
Calculator I had to create for the WDI homework first week. The instructions are at the top.
# Create a command line calculator. It should have a basic and advanced mode.
#
# * basic calculator (+, -, *, /)
# * advanced calculator (exponents, square root)
#
# * For a basic calculator, press 1.
# * For an advanced calculator, press 2. To quit, press Q.
# * For calculators, first enter type of calculation, then enter 2 numbers.
#
# Create methods for each operation, and each one to show and interact with a text menu.
# ----------------------------------------------------------------------------
# Add a trip calculator to your program. Ask the user (politely) for four inputs:
#
# **Distance** – how far will you drive?
# **MPG** – what is the fuel efficiency of the car?
# **$PG** – how much does gas cost per gallon?
# **Speed** – how fast will you drive?
#
# Your output is a string: “Your trip will take 3.5 hours and cost $255.33.”
#
# Add this as a menu choice.
def add(num1, num2)
num1 = num1.to_f
num2 = num2.to_f
if (num1 && num2).is_a? Float
answer = num1 + num2
puts "#{num1} + #{num2} = #{answer}"
else
puts 'You did not enter valid numbers. Please try again.'
end
end
def subtract(num1, num2)
num1 = num1.to_f
num2 = num2.to_f
if (num1 && num2).is_a? Float
answer = num1 - num2
puts "#{num1} - #{num2} = #{answer}"
else
puts 'You did not enter valid numbers. Please try again.'
end
end
def multiply(num1, num2)
num1 = num1.to_f
num2 = num2.to_f
if (num1 && num2).is_a? Float
answer = num1 * num2
puts "#{num1} * #{num2} = #{answer}"
else
puts 'You did not enter valid numbers. Please try again.'
end
end
def divide(num1, num2)
num1 = num1.to_f
num2 = num2.to_f
if (num1 && num2).is_a? Float
answer = num1 / num2
puts "#{num1} / #{num2} = #{answer}"
else
puts 'You did not enter valid numbers. Please try again.'
end
end
def exponent(num, exp)
num = num.to_i
exp = num.to_i
if (num && exp).is_a? Fixnum
answer = num ** exp
puts "#{num} to the power of #{exp} is #{answer}"
else
puts 'You did not enter valid numbers. Please try again.'
end
end
def square_root(num)
num = num.to_i
if num.is_a? Fixnum
answer = Math.sqrt(num.to_i)
puts "The square root of #{num} is #{answer}"
else
puts 'You did not enter valid numbers. Please try again.'
end
end
def trip_time(distance, speed)
distance = distance.to_f
speed = speed.to_i
unless (distance || speed).zero?
time = distance / speed
time = time.round(2)
return time
else
puts 'You did not enter valid numbers. Please try again.'
end
end
def trip_cost(distance, mpg, gas_cost)
distance = distance.to_f
mpg = mpg.to_f
gas_cost = gas_cost.to_f
if ((distance && mpg && gas_cost).is_a? Float) && ((distance && mpg && gas_cost).zero? == false)
gas_for_trip = distance / mpg
trip_cost = gas_cost * gas_for_trip
trip_cost = trip_cost.round(2)
return trip_cost
else
puts 'You did not enter valid numbers. Please try again.'
end
end
def bmi(height, weight)
height = height.to_i
weight = weight.to_f
unless (height || weight).zero?
bmi = (weight / (height * height)) * 703
bmi = bmi.round(2)
puts "Your BMI is #{bmi}."
else
puts 'You did not enter valid numbers. Please try again.'
end
end
def basic
puts 'What type of calculation would you like to perform:'
puts 'add, subtract, multiply, or divide?'
calc_type = gets.chomp.downcase
puts "Please enter 2 numbers that you would like to #{calc_type} separated by comma."
nums = gets.chomp
nums = nums.split(',')
case calc_type
when 'add'
add(nums[0], nums[1])
when 'subtract'
subtract(nums[0], nums[1])
when 'multiply'
multiply(nums[0], nums[1])
when 'divide'
divide(nums[0], nums[1])
else
puts 'I didn\'t understand your command.'
basic
end
puts ''
start
end
def advanced
puts 'What type of calculation would you like to perform:'
puts 'square root, or exponent?'
calc_type = gets.chomp.downcase
if calc_type == 'exponent'
puts 'Enter 2 numbers separated by a comma:'
nums = gets.chomp.split(',')
elsif calc_type == 'square root'
puts 'What is the number you\'d like the square root of?'
num = gets.chomp
else
puts 'I didn\'t understand your command.'
advanced
end
case calc_type
when 'square root'
square_root(num)
when 'exponent'
exponent(nums[0], nums[1])
else
puts 'I didn\'t understand your command.'
advanced
end
puts ''
start
end
def trip_calc
puts 'How many miles are you going to drive?'
distance = gets.chomp
puts 'What is the fuel efficiency of the car?'
mpg = gets.chomp
puts 'How much does gas cost per gallon?'
gas_cost = gets.chomp
puts 'What is the speed you will you drive? (Please enter number only)'
speed = gets.chomp
time = trip_time(distance, speed)
cost = trip_cost(distance, mpg, gas_cost)
if (time && cost).is_a? Float
puts "Your trip will take #{time} hours and cost $#{cost}."
end
puts ''
start
end
def bmi_calc
puts 'Please enter your height in inches:'
height = gets.chomp
puts 'Please enter your weight in lbs:'
weight = gets.chomp
bmi(height, weight)
puts ''
start
end
def start
puts '---------------------------------------------------'
puts 'For a basic calculator, press 1.'
puts 'For an advanced calculator, press 2.'
puts 'For a trip calculator, press 3.'
puts 'For a BMI calculator, press 4. To quit, press Q.'
puts '---------------------------------------------------'
choice = gets.chomp.downcase
if choice == '1'
basic
elsif choice == '2'
advanced
elsif choice == '3'
trip_calc
elsif choice == '4'
bmi_calc
elsif choice == 'q'
Process.exit(0)
else
puts 'I didn\'t understand your command.'
start
end
end
start
@Richard-Gutierrez

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@Richard-Gutierrez Richard-Gutierrez commented Oct 3, 2015

Holy smokeys' looks very eleganté

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