#
# Author:  James Tam
# Version: March 3, 2010
#
# The second version of a program that tracks the grades for a class.
# 

# Global constant to specify the size of the list.
CLASS_SIZE = 5

# Step through the list an element at a time and get the user to input the
# grades.
def read (classGrades, average):
    total = 0

    for i in range (0, CLASS_SIZE, 1):
        # Because list indices start at zero add one to the student number.
        temp = i + 1
        print "Enter grade for student no.", temp, ":",
        classGrades[i] = input ()
        total = total + classGrades[i]
        average = total / CLASS_SIZE
    return (classGrades, average)

# Traverse the list and display the grades.
def display (classGrades, average):
    print
    print "GRADES"
    print "The average grade is", average, "%"
    for i in range (0, CLASS_SIZE, 1):
        # Because array indices start at zero add one to the student number.
        temp = i + 1
        print "Student no.", temp, ":", classGrades[i], "%"


# MAIN FUNCTION
# Variable initializations
i = 0
temp = 0
average = 0


# Creates a variable that refers to the list with no elements
classGrades = []

# Create a list with 5 elements with each element initialized to zero
# Within the body of the loop create a new list element that contains 0
# and append / add it to the end of the list.
for i in range (0, CLASS_SIZE, 1):
        classGrades.append(0)

classGrades, average = read (classGrades, average)
display (classGrades, average)