Formula to convert Calaneder Date to Julian ?

My professor is making us do a program that converts calender Date to Julian date and vice versa, I have looked online for one but it gives me the julian day I am looking for the one that continuouly counts from January 1 to December 31 so January 1 will be equal to 1 in julian date january 2 will equal to 2 in julian, November 15 will equal to 319 in julian and so forth.


I am not very good at math so if someone can help me ....



Thanks in advance

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I am not very good at math

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you do not know how to substract two numbers?

If I tell you that January has 31 days what will be the Julian date 32 correspond to?
And 45?

Julian day of year formula:

a = (nDate + 31738) mod 146097 mod 36524 mod 1461
b= a/1460

JulianDayofYear = (a-b) mod 365 + b + 1

Where nDate is equal to the Julian period and all division are integer divisions