Asks for your hw and exam scores, calculates your 3203 grade

3203_grade.rb

#!/usr/bin/env ruby

if __FILE__ == $PROGRAM_NAME

	hw_weights = [ 40.0, 50.0, 40.0, 36.0, 37.0, 38.0 ]
	hw_scores = []
	
	hw_scores = hw_weights.each_with_index.collect do |max, i|
		print "Enter hw #{i+1} score: "
		(gets.to_f / max) * 20
	end
	
	lowest_hw = hw_scores.min
	lowest_index = hw_scores.find_index(lowest_hw)
	puts "Dropping lowest hw: hw_#{lowest_index + 1} worth #{lowest_hw}/20"
	hw_scores.delete_at(lowest_index)
	hw_weights.delete_at(lowest_index)
	
	exam_weights = [100, 100, 200]
	exams = %w(midterm1 midterm2 final)
	
	# exam_scores will store percentages
	exam_scores = exam_weights.each_with_index.collect do |weight, i|
		print "Enter #{exams[i]} score: "
		(gets.to_f / weight)
	end
	
	best_score = exam_scores.max
	worst_score = exam_scores.min
	best_exam = exam_scores.find_index(best_score)
	worst_exam = exam_scores.find_index(worst_score)
	puts "Adjusting your best exam: #{exams[best_exam]} "
	puts "Adjusting your worst exam: #{exams[worst_exam]} "
	exam_weights[best_exam] = exam_weights[best_exam] == 100 ? 120 : 220
	exam_weights[worst_exam] = exam_weights[worst_exam] == 100 ? 80 : 180
	
	adjusted_exams = exam_weights.each_with_index.collect do |weight, i|
		exam_scores[i] * weight
	end
	
	hw_grade = hw_scores.inject(:+)
	exam_grade = adjusted_exams.inject(:+)

	class_total = (hw_grade + exam_grade) / 5
	puts "Class total: #{class_total}"

end