The problem of converting dates to days of the week.

laberts

Enter the date of any day to get the day of the week, such as "2007-1-1" to output "Monday".
How to write an algorithm?
(Take January 1st AD as Sunday and consider leap years)

40668477

Write yourself and practice your hands first.

白色幽魂

Homework again? Oh, you can write a simple date class and add it.

laberts

Yes, I'll write first, but I can't write it

wenbinjiao

Just use time.h directly