"Tom" writes:
Hello, please help me, I need two write a C++ program that can
calculate the number of days between two dates.
Presuming this is a student exercise.....
Top down design is usually preferred but in this case I think it would be OK
to do bottom up. IOW, it isn't really design, it's a Topsy like growth from
the bottom up. You can surely do that for two dates in the same month,
right? Do that. Then consider adjacent months. where neither one of them
is February. Then allow for intervening months in the same year. Then
different years where neither year is a leap year. Then handle leap years
properly. Look in a good dictionary, the leap year rule might have more
rules than you know about.
After completing something like this sequence you will have learned a lot
and you can throw all that code away and write a nice pretty program that
does what you have been asked to do.
If this is not a student exercise, look up Julian day number.
