# print vs. return
# Consider the following code, what's wrong?
# How should we improve it?


def main(num1, num2):
    show_sum(num1, num2)


def show_sum(num1, num2):
    result = num1 + num2
    accumulate += result
    print('result = ' + str(result), 'accumulate = ' + str(accumulate))


accumulate = 0
print('The sum of 12 and 45 is ', main(12, 45))
print('The sum of 21 and 45 is ', main(21, 45))
print('The sum of 21 and 54 is ', main(21, 54))