# Gradebook
#
# This program allows the user to enter grade information for a class of students and 
# calculate final grades. It reports student's names, total points, and letter grades. It
# also report s the class average and the average grade for the class.
#
# Written by Bart Simpson
# 18 November 2011

# computeGrade
# 
# this function is given a score and returns the equivalent letter grade
#
def computeGrade(score):
	
	if score >= 90:
		grade = "A"
	elif score >= 80:
		grade = "B"
	elif score >= 70:
		grade = "C"
	elif score >= 60:
		grade = "D"
	else:
		grade = "F"
	return grade
	
# end of computeGrades

# getExamPoints
#
# This function is given a student name and solicits the user to enter
# four exam scores for the student. It then computes the number 
# of points the exams earn toward a final grade.
#
def getExamPoints ( student ):
	points = 0.0
	
	for i in range (1,5):
		points = points + input ("Please enter " + student +
				 "'s score for exam " + str (i) + ">  " )
	return points*50.0 / 800
	
# end of getExamPoints

# getHomeworkPoints
#
# This function is given a student name and solicits the user to enter
# five homework scores for the student. It then computes the number 
# of points the exams earn toward a final grade.
#
def getHomeworkPoints ( student ):
	points = 0.0
	
	for i in range (1,6):
		points = points + input ("Please enter " + student +
				 "'s score for homework " + str (i) +  ">  " )
	return points / 5.0	
	
# end of getQuizPoints


# getProjectPoints
#
# This function is given a student name and solicits the user to enter
# three project scores for the student. It then computes the number 
# of points the exams earn toward a final grade.
#
def getProjectPoints ( student ):
	points = 0.0
	
	for i in range (1,4):
		points = points + input ("Please enter " + student +
				 "'s score for project " + str (i) +  ">  "  )
				
	return  points * 40.0 / 300	
	
# end of getProjectPoints


def main ( ):

	classAverage = 0.0		# initialize averages
	classAvgGrade = "C"
                
	studentScore = 0.0
	classTotal = 0.0
	studentCount = 0
	gradeReport = "\n\nStudent\tScore\tGrade\n============================\n"

	studentName = raw_input ("Enter the next student's name, 'quit' when done> ")
        
	while studentName != "quit":
        
		studentCount = studentCount + 1

		examPoints = getExamPoints (studentName)
		hwPoints = getHomeworkPoints (studentName)
		projectPoints = getProjectPoints  (studentName)
		
		studentScore = examPoints + hwPoints + projectPoints
		
		studentGrade = computeGrade (studentScore)
		
		gradeReport = gradeReport + "\n" + studentName + ":\t%6.1f"%studentScore+"\t"+studentGrade 
 
		classTotal = classTotal + studentScore
            
            	studentName = raw_input ("Enter the next student's name, 'quit' when done> ")
        
       	print gradeReport
        
	classAverage = int ( round (classTotal/studentCount) )
        
	 # call the grade computation function to determine average class grade
        
	classAvgGrade = computeGrade ( classAverage )
        
	print  "Average class score: " , classAverage, "\nAverage class grade: ", classAvgGrade 
	        
main ( ) # Launch