Introduction - If you have any usage issues, please Google them yourself
Printf ("three days to catch fish, two days to catch nets" \n, a person always fish on the first day of the year, three days after fishing, two days of drying nets, \n ask a certain month a day to catch fish or to net. \n ");
Int y=0, m=0, d=0;
Printf ("please enter year. Month. Day (such as 2017.8.15):");