# coding:utf-8

'''

filename: tryexceptccb.py

'''

while 1:

print("this is a division program.")

c = input("input 'c' continue, otherwise logout:")

if c == 'c':

a = input("first number:")

b = input("second number:")

try:

print(float(a)/float(b))

print("*************************")

except ZeroDivisionError:

print("The second number can't be zero!")

print("*************************")

else:

break