def volume_convert():
volume = Volume()
while True:
title()
option = str(input('''
[1] centimetro cúbico a Litro
[2] Litros a centimetro cúbico
[3] Milimetros cúbicos a Litros
[s]alir
''')).lower()
if option == '1':
volume.cmAL()
elif option == '2':
volume.LAcm()
elif option == '3':
volume.mcAL()
elif option == 's':
break
else:
print('Ingreso un dato invalido')
