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Questions - ctime

Conversion of Local Time to GMT/UTC, and back GMT/UTC to Local Time in C++

The problem of conversion from GMT/UTC to local time in C++ is tricky because of daylight saving. To solve the daylight saving problem there must be a table for every country and zone, since daylight ...
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PKallback

c++

mfc

ctime

Votes: 0

Answers: 0

Expiration Date Based on Shelf_Life

I don't know what is wrong with my code. My code works if the shelf_life is over 1 year. But if the shelf_life is 6 months. It expired very short. It takes only 3 months and it is already expired. But...
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PJiwon

c++

mfc

ctime

Votes: 0

Answers: 0

ctime lib, pointer in C++

tm *ltm = localtime(&now); cout << "Year: "<< 1900 + ltm->tm_year << endl; in ctime lib why we must use ltm->tm_year but can't use *1tm.tm_year
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EllieHz

c++

pointers

ctime

Votes: 0

Answers: 1

Latest Answer

Because of the precedence of operators in c++ *1tm.tm_year means *(1tm.tm_year) you can do (*1tm).tm_year but thats a bit ugly, hence this: 1tm->tm_year
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pm100

How to get the expiration date based on week code not on current date using c++

How will I get the expiration date of an item, which is based on week code? Whenever I run the code that I made, the program reads the current date and disregards the week code. For example: Week Code...
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PJiwon

c++

visual-studio-2015

timespan

ctime

Votes: 0

Answers: 1

Latest Answer

Here's how I would do it using Howard Hinnant's free, open-source, header-only date library: #include "date/iso_week.h" #include "date/date.h" #include <chrono> #include <...
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Howard Hinnant

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