grades = {}
classes = []
numclasses = int(input("How many classes do you have? "))
for i in range(1, numclasses + 1):
  name = input("What is the name of class " + str(i) + "?")
  classes.append(name)

def calc(classname, grade):
  grades[classname] = grade
  return grades


for i in range(0, numclasses):
  percentgrade = float(input("What is your percent grade in " + classes[i] + "? "))
  while percentgrade:
    if percentgrade > 100:
      print("Grade cannot be higher than 100.")
      percentgrade = float(input("What is your percent grade in " + classes[i] + "? "))
    elif percentgrade < 0:
      print("Grade cannot be less than 0.")
      percentgrade = float(input("What is your percent grade in " + classes[i] + "? "))
    else:
      calc(classes[i], percentgrade)
      break
total = 0
for i in classes:
  total = total + grades[i]

avg = total / numclasses
print("Your average is " + str(avg) + " .")
if avg < 65:
  print("Your GPA is 0.0")
if 65 <= avg < 67:
  print("Your GPA is 1.0")
if 67 <= avg < 70:
  print("Your GPA is 1.3")
if 70 <= avg < 73:
  print("Your GPA is 1.7")
if 73 <= avg < 77:
  print("Your GPA is 2.0")
if 77 <= avg < 80:
  print("Your GPA is 2.3")
if 80 <= avg < 83:
  print("Your GPA is 2.7")
if 83 <= avg < 87:
  print("Your GPA is 3.0")
if 87 <= avg < 90:
  print("Your GPA is 3.3")
if 90 <= avg < 93:
  print("Your GPA is 3.7")
if 93 <= avg <= 100:
  print("Your GPA is 4.0")
#Determines which GPA score the raw score should correspond to

#Code debugged by Arafat