Merge branch 'daisymarie128-master'

Author: epoch

hackers/daisy_smith/wk1d2/README.md

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+# Calculator
+
+###Objectives:
+- Practice with functions, loops, conditions, user-input, switch/case
+
+###Activity:
+- Students should work on this lab in groups.
+
+###Explanation
+- 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.
+- The instructor should carefully step through the lab with the students, as they type out the requirements for each specification.
+- Consider having the students make git commits as they finish each phase, so they can see the history
+
+###Specification:
+- A user should be given a menu of operations
+- A user should be able to choose from the menu
+- A user should be able to enter numbers to perform the operation on
+- A user should be shown the result
+- This process should continue until the user selects a quit option from the menu
+
+#####Phase 1
+- Calculator functionality
+  - Calculator should be able to do basic arithmetic (+,-, *, /)
+
+#####Phase 2
+- Advanced Calculator functionality
+  - Calculator should be able to do basic arithmetic (exponents, square roots)
+
+#####Phase 3
+- User should be given a menu of Calculator functionality
+- User should be able to choose indented functionality
+
+## Mortgage & BMI Calculators
+
+Add additional features to your calculators:
+
+* [Mortgage:](http://www.wikihow.com/Sample/Mortgage-Payment)
+  * Calculate the monthly payment when given the other variables as input.
+* [BMI:](http://www.wikihow.com/Image:BMI.jpg)
+  * Calculate the BMI when given the height and weight.
+
+## Trip Calculator
+
+* This option asks the user 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?
+
+* The output is a string: "Your trip will take 3.5 hours and cost $255.33."
+* 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/daisy_smith/wk1d2/calc.rb

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+def choice
+	puts "choose calculator"
+	print "(b)asic, (a)dvanced (m)ore : "
+	gets.chomp.downcase
+end
+
+def read_choice
+	gets.chomp.downcase
+end
+
+def basic_calc
+	print "(a)dd, (s)ubtract, (m)ultiply, (d)ivide: "
+	response = read_choice
+	if response == "a"
+		puts "first number you want to add?"
+		number1 = gets.chomp.to_i
+		puts "second number you want to add?"
+		number2 = gets.chomp.to_i
+		total = addition(number1, number2)
+	elsif response == "s"
+		puts "first number?"
+		number1 = gets.chomp.to_i
+		puts "second number?"
+		number2 = gets.chomp.to_i
+		total = subtract(number1, number2)
+	elsif response == "m"
+		puts "first number"
+		number1 = gets.chomp.to_i
+		puts "second number?"
+		number2 = gets.chomp.to_i
+		total = multiply(number1, number2)
+	elsif response == "d"
+		puts "first number?"
+		number1 = gets.chomp.to_i
+		puts "second number?"
+		number2 = gets.chomp.to_i
+		total = divide(number1, number2)
+	end
+
+	puts total
+	return choice
+end
+
+def addition(num1, num2)
+	num1 + num2
+end
+
+def subtract(num1, num2)
+	num1 - num2
+end
+
+def multiply(num1, num2)
+	num1 * num2
+end
+
+def divide(num1, num2)
+	num1 / num2
+end
+
+def adv_choice
+	gets.chomp
+end
+
+def advanced_calc
+	print "(p)ower, (s)qrt: "
+	adv_response = adv_choice
+	if	adv_response == "p"
+		puts "first number?"
+		number1 = gets.chomp.to_i
+		puts "second number?"
+		number2 = gets.chomp.to_i
+		total = power(number1, number2)
+	elsif adv_response == "s"
+		puts "what should we find the square root of?"
+		number1 = gets.chomp.to_i
+		total = sqrt(number1)
+	end
+
+puts total
+
+end
+
+
+def power(num1, num2)
+	num1 ** num2	
+end
+
+def sqrt(num1)
+	Math.sqrt(num1)
+end
+
+def additional_choice
+	gets.chomp
+end
+
+def additional_ft
+	print "(m)ortgage, (b)mi, (t)trips"
+	add_response = additional_choice
+	if add_response == 'm'
+		puts "What is the principal of the loan?"
+		principal = gets.chomp.to_i
+		puts "What is the interest rate?"
+		interest = gets.chomp.to_i
+		puts "What is the number of payments?"
+		payments = gets.chomp.to_i
+		total = monthly(principal, interest, payments)
+			elsif add_response == 'b'
+			puts "What is your weight?"
+			weight = gets.chomp.to_i
+			puts "What is your height?"
+			height = gets.chomp.to_i
+			total = bmi(weight, height)
+		elsif add_response == 't'
+			puts "How far will you drive?"
+			distance = gets.chomp
+			puts "What is the fuel efficiency of the car"
+			mpg = gets.chomp
+			puts "How much does gas cost per gallon?"
+			pg = gets.chomp
+			puts "How fast will you drive?"
+			speed = gets.chomp
+			total = trip_calc {"Your trip will take #{distance} and cost $#{pg}"}
+	end
+
+puts total
+
+end
+
+def monthly(principal, interest, payments)
+	principal * interest *( 1 + interest ) * payments / ( 1 + interest ) * payments - 1
+end
+
+def bmi(weight, height)
+	weight / height * height
+end
+
+def trip_calc(distance, mpg, pg,speed)
+	distance / speed * mpg * pg
+end
+
+# main program
+chosen = choice
+if chosen == "a"
+	advanced_calc
+elsif chosen == "b"
+	basic_calc
+elsif chosen == "m"
+	additional_ft
+end
+
+# return choice
+# return chosen
+chosen = choice
+puts "im here"
+
+while chosen != 'q'
+	chosen = choice
+end

hackers/daisy_smith/wk1d3/mta.rb

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+lines = {
+  :n => {'Times Square' => 1, '34th' => 2, '28th' => 3, '23rd' => 4, 'Union Square' => 5, '8th' => 6},
+  :l => {'8th' => 3, '6th' => 4, 'Union Square' => 5, '3rd' => 6, '1st' => 7},
+  :six => {'Grand Central' => 1, '33rd' => 2, '28th' => 3, '23rd' => 4, 'Union Square' => 5, 'Astor Place' => 6}
+}
+
+p "Are you on n, l or six?"
+  line1 = gets.chomp
+p "What Station are you at?"
+  current_location = gets.chomp
+p "Is your destination on n, l or six?"
+  line2 = gets.chomp
+p "What Station are you going to?"
+  destination = gets.chomp
+
+station = lines[line1.to_sym][current_location]
+station2 = lines[line2.to_sym][destination]
+list = lines[line1.to_sym][current_location]..lines[line2.to_sym][destination]
+
+stops = station2 - station
+if stops < 0
+  stops = stops + station
+  p "There are #{stops} stops between #{current_location} and #{destination} #{list}"
+else
+p "There are #{stops} stops between #{current_location} and #{destination}"
+end

homework/wk1d3/README.md

@@ -8,12 +8,14 @@
   - The 6 line has the following stops: Grand Central, 33rd, 28th, 23rd, Union Square, and Astor Place.
   - All 3 subway lines intersect at Union Square, but there are NO other intersection points.
     - For example, this means the 28th stop on the N line is different than the 28th street stop on the 6 line, so you'll have to differentiate this when you name your stops in the arrays.
+
 - The program takes the line and stop that a user is getting on at and the line 
+- The program takes the line and stop that a user is getting on at and the line
 and stop that user is getting off at and prints the total number of stops for the trip.
 
 ---
 
-###Hints: 
+###Hints:
 - Get the program to work for a single line before trying to tackle multiple lines.
 - Consider diagraming the lines by sketching out the subway lines and their stops and intersection.
 - Make subway lines keys in a hash, while the values are an array of all the stops on each line.