# Unit 3 Problem solving Homework question 2
#check barcodes
#The check digit is calculated as follows:
#assign weights of 1, 3, 1, 3, 1 to the five digits
#multiply each digit by its weight
#add the weighted numbers together
#divide the total by 10 
#the remainder is the check digit

import random

def calculateCheckDigit(code):
    x = code[0] + code[2] + code[4] + (code[1] + code[3])*3
    x = x % 10  # % is mod, gives remainder after dividing by 10
    return x
#end sub

#main program

totalCorrect = 0
for count in range (0,100):
    barcode = []
    for n in range(0,6):
        digit = int(random.randint(0,9))
        barcode.append(digit)
    checkdigit = calculateCheckDigit(barcode)
#    print ("Test barcode and check digit", barcode, checkdigit)
    if checkdigit == barcode[5]:
        totalCorrect = totalCorrect + 1
        print(barcode)
    #endif
print ("Total correct barcodes ",totalCorrect)