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Dealing with date

pinko (13)
Hi dudes!

i am working on a library system. If issue date is current date, the due date will be the date after 14 days of current date. i am unable to make the algorithm for calculation of due date. kindly guide me.
Last edited on
MiiNiPaa (8886)
Playing with chrono:
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#include <chrono> //Looks like chrono includes ctime as well
#include <iostream>

int main()
{
    using std::chrono::system_clock;
    
    auto issue_date(std::chrono::system_clock::now());
    auto due_date = issue_date + std::chrono::hours(24*14);
    
    std::time_t issue_date_o(system_clock::to_time_t(issue_date));
    std::time_t due_date_o(system_clock::to_time_t(due_date));
    
    char mbstr[100];
    if (std::strftime(mbstr, 100, "%d %B %Y", std::localtime(&issue_date_o)))
        std::cout << "issued on: " << mbstr << '\n';
    if (std::strftime(mbstr, 100, "%d %B %Y", std::localtime(&due_date_o)))
        std::cout << "due date: "<< mbstr;
}

EDIT: if you want to use only time_t and ctime:
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#include <ctime>
#include <iostream>

int main()
{
    std::time_t issued = std::time(NULL);
    std::tm due_tm = *std::localtime(&issued);
    due_tm.tm_mday += 14;
    std::time_t due = std::mktime(&due_tm);

    char mbstr[100];
    if (std::strftime(mbstr, 100, "%d %B %Y", std::localtime(&issued)))
        std::cout << "issued on: " << mbstr << '\n';

    if (std::strftime(mbstr, 100, "%d %B %Y", std::localtime(&due)))
        std::cout << "due to: " << mbstr << '\n';
}
Last edited on
eklavya sharma 2 (170)
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