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Merge branch 'master' of github.com:epoch/wdi5_homework
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‎hackers/xaun_lopez/wk1d2/README.md ‎hackers/david mesaros/wk1d2/README.md

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‎hackers/david mesaros/wk1d2/cal.rb

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def greet
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print "Welcome, would you like to use (b)asic, (a)dvance, ,(m)ortgage repayment ,check your bm(i) or (t)rips"
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greet = gets.chomp.downcase
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end
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def menu_one
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greeting = greet
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if greeting == 'b'
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puts "basic calc"
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basic_calc
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elsif greeting == 'a'
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puts "advance calc"
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advance_calc
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elsif greeting == 'm'
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puts "mortgage repayment"
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mortgage_repayment
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elsif greeting == "i"
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puts "BMI"
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bmi
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elsif greeting == "t"
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puts "Trip Calculator"
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trip_calc
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elsif greeting == 'q'
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puts "Quitting"
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Kernel.exit
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end
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end
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def basic_calc
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print "(a)dd, (s)ubtract, (m)ultiply, (d)ivide: "
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basic_response = gets.chomp
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case basic_response
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when "a"
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print ""
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x = gets.to_i
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print ""
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y = gets.to_i
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puts "= " + (x + y).to_s
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when "s"
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print ""
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x = gets.to_i
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print ""
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y = gets.to_i
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puts "= " + (x - y).to_s
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when "m"
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print ""
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x = gets.to_i
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print ""
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y = gets.to_i
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puts "= " + (x * y).to_s
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when "d"
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print ""
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x = gets.to_i
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print ""
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y = gets.to_i
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puts "= " + (x / y).to_s
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end
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end
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def advance_calc
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print "(p)ower, sq(r)t: "
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advance_response = gets.chomp
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case advance_response
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when "p"
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print ""
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x = gets.to_i
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print ""
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y = gets.to_i
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puts "= " + (x ** y).to_s
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when "r"
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print ""
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x = gets.to_f
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puts "= " + Math.sqrt(x).to_s
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end
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end
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def mortgage_repayment
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print " Principal of the loan($) = "
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p = gets.chomp.to_f
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print " Interest rate(%) = "
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i = gets.chomp.to_f/100
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print " Number of payments = "
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n = gets.chomp.to_i
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puts "Monthly payments = $#{ p * i * (1 + i) ** n / ((1 + i) ** n - 1)}".to_f.round(2)
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end
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def bmi
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# print " Weight in Kilograms ="
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# x = gets.chomp.to_f
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# print " Height in Meters ="
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# y = gets.chomp.to_f
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# puts "Your BMI is = #{x/(y * y)}"
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print "Height(m) = "
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x = gets.chomp.to_f
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print "Weight(kg) = "
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y = gets.chomp.to_f
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puts "BMI = #{y / x ** 2}."
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end
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def trip_calc
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print "How far will you drive? "
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dist = gets.chomp.to_i
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print "What is the fuel efficiency of the car? "
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mpg = gets.chomp.to_i
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print "How much does gas cost per gallon? ($) "
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cpg = gets.chomp.to_f
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print "How fast will you drive? "
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speed = gets.chomp.to_i
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new_mpg = ((speed - 60) * 2 - mpg).abs
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cost = ((dist / new_mpg) * cpg).abs
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time = dist / speed.to_f
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puts "Your trip will take #{time} hours and cost $#{cost}."
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end
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while true
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menu_one
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end
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‎hackers/david mesaros/wk1d3/mta.rb

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lines = {
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:n =>["Times Square", "34th", "28th", "23rd", "Union Square", "8th" ],
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:l => ["8th", "6th", "Union Square", "3rd", "1st"],
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:"L6" => ["Grand Central" , "33rd", "28th", "23th", "Union Square", "Astor Place"]
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}
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def user_choice
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puts "Welcome, which NYC Subway line would like to go on"
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puts "(n) line "
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puts "(l) line "
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puts "(L6) line "
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user_pick = gets.chomp.downcase
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end
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user_pick = user_choice.downcase
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# Try changing 'n' to 'l' below to see the other line:
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user_choice = 'n' # pretend we read this from the keyboard with gets.chomp
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stops = lines[ user_choice.to_sym ] # need to convert 'n' string to :n symbol
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stops.each do |stop|
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puts "Here is the stop on this line: #{stop}"
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end
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‎hackers/david_mesaros/wk1d2/README.md

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# Calculator
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###Objectives:
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- Practice with functions, loops, conditions, user-input, switch/case
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###Activity:
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- Students should work on this lab in groups.
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###Explanation
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- You will be building a calculator. A calculator can perform multiple arithmetic operations. Your function should allow the user to choose which operation is expected, enter in the values to perform the operation on, and ultimately view the result.
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- The instructor should carefully step through the lab with the students, as they type out the requirements for each specification.
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- Consider having the students make git commits as they finish each phase, so they can see the history
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###Specification:
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- A user should be given a menu of operations
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- A user should be able to choose from the menu
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- A user should be able to enter numbers to perform the operation on
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- A user should be shown the result
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- This process should continue until the user selects a quit option from the menu
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#####Phase 1
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- Calculator functionality
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- Calculator should be able to do basic arithmetic (+,-, *, /)
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#####Phase 2
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- Advanced Calculator functionality
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- Calculator should be able to do basic arithmetic (exponents, square roots)
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#####Phase 3
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- User should be given a menu of Calculator functionality
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- User should be able to choose indented functionality
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## Mortgage & BMI Calculators
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Add additional features to your calculators:
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* [Mortgage:](http://www.wikihow.com/Sample/Mortgage-Payment)
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* Calculate the monthly payment when given the other variables as input.
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* [BMI:](http://www.wikihow.com/Image:BMI.jpg)
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* Calculate the BMI when given the height and weight.
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## Trip Calculator
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* This option asks the user for four inputs:
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* Distance – how far will you drive?
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* MPG – what is the fuel efficiency of the car?
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* $PG – how much does gas cost per gallon?
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* Speed – how fast will you drive?
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* The output is a string: "Your trip will take 3.5 hours and cost $255.33."
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* For every 1 MPH over 60 MPH, reduce the the MPG by 2 MPG. (i.e. a car that normally gets 30 mpg would only get 28 mpg if its speed were 61 mph. Yes this gets silly at high speed where mpg goes to zero or gets negative.)

‎hackers/david_mesaros/wk1d2/cal.rb

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def greet
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print "Welcome, would you like to use (b)asic, (a)dvance, ,(m)ortgage repayment ,check your bm(i) or (t)rips"
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greet = gets.chomp.downcase
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end
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def menu_one
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greeting = greet
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if greeting == 'b'
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puts "basic calc"
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basic_calc
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elsif greeting == 'a'
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puts "advance calc"
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advance_calc
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elsif greeting == 'm'
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puts "mortgage repayment"
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mortgage_repayment
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elsif greeting == "i"
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puts "BMI"
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bmi
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elsif greeting == "t"
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puts "Trip Calculator"
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trip_calc
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elsif greeting == 'q'
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puts "Quitting"
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Kernel.exit
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end
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end
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def basic_calc
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print "(a)dd, (s)ubtract, (m)ultiply, (d)ivide: "
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basic_response = gets.chomp
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case basic_response
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when "a"
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print ""
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x = gets.to_i
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print ""
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y = gets.to_i
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puts "= " + (x + y).to_s
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when "s"
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print ""
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x = gets.to_i
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print ""
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y = gets.to_i
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puts "= " + (x - y).to_s
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when "m"
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print ""
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x = gets.to_i
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print ""
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y = gets.to_i
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puts "= " + (x * y).to_s
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when "d"
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print ""
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x = gets.to_i
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print ""
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y = gets.to_i
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puts "= " + (x / y).to_s
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end
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end
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def advance_calc
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print "(p)ower, sq(r)t: "
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advance_response = gets.chomp
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case advance_response
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when "p"
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print ""
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x = gets.to_i
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print ""
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y = gets.to_i
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puts "= " + (x ** y).to_s
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when "r"
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print ""
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x = gets.to_f
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puts "= " + Math.sqrt(x).to_s
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end
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end
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def mortgage_repayment
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print " Principal of the loan($) = "
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p = gets.chomp.to_f
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print " Interest rate(%) = "
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i = gets.chomp.to_f/100
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print " Number of payments = "
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n = gets.chomp.to_i
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puts "Monthly payments = $#{ p * i * (1 + i) ** n / ((1 + i) ** n - 1)}".to_f.round(2)
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end
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def bmi
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# print " Weight in Kilograms ="
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# x = gets.chomp.to_f
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# print " Height in Meters ="
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# y = gets.chomp.to_f
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# puts "Your BMI is = #{x/(y * y)}"
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print "Height(m) = "
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x = gets.chomp.to_f
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print "Weight(kg) = "
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y = gets.chomp.to_f
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puts "BMI = #{y / x ** 2}."
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end
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def trip_calc
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print "How far will you drive? "
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dist = gets.chomp.to_i
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print "What is the fuel efficiency of the car? "
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mpg = gets.chomp.to_i
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print "How much does gas cost per gallon? ($) "
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cpg = gets.chomp.to_f
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print "How fast will you drive? "
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speed = gets.chomp.to_i
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new_mpg = ((speed - 60) * 2 - mpg).abs
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cost = ((dist / new_mpg) * cpg).abs
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time = dist / speed.to_f
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puts "Your trip will take #{time} hours and cost $#{cost}."
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end
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while true
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menu_one
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end
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