#----------------------------------------------------------------------
# (C) Monday, January 29, 2018 -- Dr. William T. Verts
#
# This second version checks each number to enforce that it is either
# 0 or positive. The problem with this version is that the code to
# check values is essentially the same in each case. We've written
# the same code twice.
#----------------------------------------------------------------------
N1 = input("Enter Number #1 --- ")
while (N1 < 0):
print "This is not a positive number"
N1 = input("Enter Number #1 --- ")
N2 = input("Enter Number #2 --- ")
while (N2 < 0):
print "This is not a positive number"
N2 = input("Enter Number #2 --- ")
A = (N1 + N2) / 2.0
print "The average is: ", A